Inside a Washing Machine Motor: Explanation, Pinout, Teardown AND Experiments

Summary

This video explores the inner workings of a washing machine motor, demonstrating how to identify pinouts, power it with AC or DC, and differentiate it from a standard DC motor. The host also discusses motor speed control, field coils, and potential applications in robotics and electric vehicles.

Takeaways

• 🔧 The video demonstrates a teardown of a Zeman's washing machine motor to salvage an electric motor and fitting belt.
• 🔍 The presenter explores the motor's internals to understand its pinout, enabling repurposing for various projects.
• 🔌 The motor's pinout is crucial for its functionality, and the video provides a detailed guide on identifying and utilizing it.
• 🏗️ The motor has a tacho coil for speed regulation, which is an important aspect of its operation.
• ⚙️ The video explains the differences between universal motors and ordinary DC motors, focusing on their construction and operation.
• 🔥 A safety feature, the thermal switch, is highlighted to protect the motor from overheating.
• 🔄 The video shows how to power the motor using both AC and DC, discussing the implications of each method on motor performance.
• 🔋 The presenter discusses the concept of self-excited motors and how they differ from separately excited DC motors.
• 📉 The importance of controlling motor speed and torque is emphasized, with demonstrations of how to achieve this.
• 🧲 The role of field coils in generating the magnetic field is explained, and their impact on motor speed and torque is demonstrated.
• 🛠️ The video concludes with experiments showing the effects of remnant magnetism in the stator pack and the possibility of using permanent magnets instead of field coils.

Q & A

What was the main purpose of the video?

The main purpose of the video was to demonstrate how to salvage an electric motor from a washing machine, explore its internal components, and show how to power it with both AC and DC sources.

Why did the presenter choose to examine a Milliband washing machine motor instead of the Zeman's motor?

The presenter chose to examine a Milliband washing machine motor because it was bulkier, more rugged, and he had a couple of them available for future projects, unlike the Zeman's motor which was precious due to its own transmission.

What is a universal motor and how does it differ from an ordinary DC motor?

A universal motor is a type of electric motor that can be powered by both AC and DC sources. It differs from an ordinary DC motor, which typically uses permanent magnets, by having field coils or field windings that generate the magnetic field when powered by AC or DC.

What is the significance of the tacho coil in the motor?

The tacho coil is used in conjunction with a small permanent magnet and a coil to read out the motor speed and control it. It is an important component for motor regulation.

What safety feature is the thermal switch in the motor?

The thermal switch is a safety feature that protects the motor from overheating. It is conductive at normal temperatures but switches off when heated, preventing current flow until it cools down.

What does the term 'series wound' mean in the context of motors?

In the context of motors, 'series wound' refers to a configuration where the field coils and the armature are connected in series, meaning the same current flows through both, affecting the motor's speed and torque.

How can the motor speed and torque be controlled when using a universal motor?

The motor speed and torque can be controlled by adjusting the voltage across the armature and the current through the field windings. Using independent voltage or current sources for each allows for precise control.

What is a 'self-excited' motor and how does it differ from a 'separately excited' DC motor?

A 'self-excited' motor is one where the field coils and the armature share the same current, meaning the voltage across them is not independent. This differs from a 'separately excited' DC motor, where the armature and field coils are powered by independent sources, allowing for separate control of speed and torque.

Why are iron filings used in the experiment with the motor's stator pack?

Iron filings are used to visualize the magnetic field lines within the stator pack of the motor. They align themselves along the magnetic field lines, providing a visual representation of the field's structure.

What is the remnant magnetic field and why does it cause the motor to continue rotating even when the field coil current is shut off?

The remnant magnetic field is the weak magnetic field that remains after the current through the field coils is shut off. It is caused by some magnetic domains in the stator pack retaining their alignment from when the current was flowing. This remnant field can cause the motor to continue rotating, albeit with reduced torque.

How can a universal motor be powered by DC using permanent magnets instead of field coils?

A universal motor can be powered by DC using permanent magnets by placing them in a stationary position to create a constant magnetic field. The motor's armature can then interact with this field to produce rotation, eliminating the need for field coils.

Outlines

00:00

🔧 Salvaging Motors from Washing Machines

The video begins with a recap of the previous episode, where the presenter salvaged an electric motor and a belt transmission from a Siemens washing machine. The current episode focuses on examining the motor's pinout and demonstrating how to power it with AC or DC. The presenter introduces the motor salvaged from the Siemens washing machine and a similar motor from a Miele washing machine. They highlight the motor's components, including the pulley, stator pack, and ten-pin connector. The aim is to understand the pinout for practical use.

05:02

⚙️ Disassembling the Motor

The presenter starts disassembling the Miele washing machine motor by removing its plastic shield and metal arm, noting the presence of Torx screws. They reveal the internal components, including a ten-pin connector and a tacho coil. The video focuses on understanding the pinout by examining the connectors and identifying a thermal switch that protects the motor from overheating. The pinout diagram includes crucial safety and control aspects.

10:05

🔌 Powering the Universal Motor

The presenter explains the significance of the motor's brushes and commutator, identifying the motor as a universal motor rather than a simple DC motor. They detail the process of connecting the motor's field coils and armature in series, powering it with AC using an isolation transformer. The presenter addresses the issue of uncontrolled motor speed and proposes controlling the motor with two independently regulated DC voltages for precision control.

15:08

🔋 Controlling Motor Speed and Torque

The presenter demonstrates controlling the motor speed and torque using a lab power supply with independently regulated DC voltages for the armature and field coils. They explain the concept of series wound, shunt wound, and separately excited DC motors, illustrating the differences with practical experiments. The focus is on achieving precise control over motor speed and torque by adjusting the voltage and current through the field coils.

20:09

🧲 Exploring Magnetic Fields in Motors

The presenter explores the role of field coils in creating magnetic fields within the motor's stator. They conduct experiments with a compass and iron filings to visualize the magnetic field lines. The video explains how reversing the current through the field coils reverses the magnetic field, enabling the motor to run on AC. The presenter also demonstrates the concept of remanent magnetism and the possibility of using permanent magnets instead of field coils for DC operation.

25:09

🛠️ Practical Applications and Future Projects

The video concludes with a summary of the experiments and their implications for repurposing washing machine motors. The presenter discusses potential applications, such as using the motor for robots or electric vehicles, and mentions ongoing projects involving Arduino motor control and mechanical drivetrains. They encourage viewers to provide feedback, support the channel on Patreon, and look forward to future episodes focusing on motor control and applications.

Keywords

💡Teardown

A teardown refers to the process of disassembling a device to examine its components and understand its construction. In the video, the host performs a teardown of a washing machine motor to demonstrate how to salvage parts such as the electric motor and fitting belt, which is central to the theme of repurposing and understanding the inner workings of machinery.

💡Electric Motor

An electric motor is a device that converts electrical energy into mechanical energy. The video focuses on the electric motor salvaged from a washing machine, discussing how to power it with both AC and DC, and exploring its internal components, which is essential for the educational purpose of the video.

💡Pinout

Pinout refers to the function of each pin on a connector. The script describes the process of determining the pinout of a motor's connector, which is crucial for understanding how to interface with and power the motor, a key aspect of the video's exploration of motor internals.

💡Universal Motor

A universal motor is a type of electric motor that can be powered by both AC and DC power sources. The video script discusses the differences between universal motors and ordinary DC motors, highlighting the versatility and unique characteristics of universal motors in the context of repurposing them for various projects.

💡Stator Pack

The stator pack, also known as the stator, is the stationary part of an electric motor that provides a path for the magnetic field. In the script, the stator pack is described as being made from laminations and having field coils, which is important for understanding the motor's construction and function.

💡Commutator

A commutator is a component in an electric motor that periodically reverses the current direction in the coils. The script mentions the commutator in the context of the motor's armature, illustrating its role in the motor's operation and how it differs between universal and permanent magnet DC motors.

💡Field Coils

Field coils are components in an electric motor that generate a magnetic field when energized. The video script explains how field coils are used in universal motors to create a variable magnetic field, allowing for control over the motor's speed and torque.

💡Tacho Coil

A tacho coil is a sensor used to measure the speed of a motor. The script describes the tacho coil's function in conjunction with a small permanent magnet to read out the motor speed, which is important for understanding motor control and regulation.

💡Thyristor Circuit

A thyristor circuit is an electronic device used to control the flow of electricity, often for motor speed regulation. The script refers to a simple thyristor circuit as a solution for maintaining constant motor speeds, showcasing an application of electronics in motor control.

💡Isolation Transformer

An isolation transformer is used to electrically isolate a device from the power source, providing safety and flexibility in electrical systems. The script mentions using an isolation transformer when powering the motor, which is relevant for safe experimentation and motor operation.

💡Magnetic Field

A magnetic field is a region around a magnetic material or a moving electric charge within which the force of magnetism acts. The video script discusses the magnetic field in the context of the stator pack and field coils, demonstrating how it affects the motor's operation and can be manipulated for different motor behaviors.

Highlights

Teardown of Zeman's washing machine motor to salvage electric motor and fitting belt.

Exploration of motor internals to determine pin out and powering options with AC or DC.

Differences between universal motors and ordinary DC motors discussed.

Salvaged Miele washing machine motor used for demonstration, noted for its transmission.

Brief examination of the motor's nameplate for specifications and regulation details.

Removal of plastic shield to access the motor's internal components safely.

Identification of the tacho coil and thermal switch within the motor for safety.

Demonstration of the temperature switch's function as an overheating protection.

Pin out diagram creation for the ten-pin connector of the motor.

Explanation of the motor's brushes and their connection to the commutator.

Discovery of unused center tabs of the field coils indicating series connection.

Simple powering of the motor by connecting field coils and armature in series.

Challenges of controlling motor speed without active speed control.

Experiment with self-made lab power supply to control motor with independently regulated DC voltages.

Observation of motor behavior with field coils current shut down and implications on torque.

Experiment with iron filings to visualize the magnetic field inside the stator pack.

Demonstration of motor operation with only permanent magnets and no field coils.

Discussion on the potential for using Arduino to control motor speed with sensor readouts.

Upcoming projects involving motor control circuits, Arduino motor shields, and mechanical drivetrains.

Transcripts

hello friends in my last episode I've

shown you a teardown of a Zeman's

washing machine and I did that in order

to show you how you can salvage an

electric motor and a fitting belt

transmission in this video I'm now going

to go a step further and take a look

inside one of these motors in order to

show you how to find out their pin out

and how to in principle power them with

both AC and or a DC and after that we're

going to explore some of the things

happening inside the motor and talk

about the differences between this type

of motor and an ordinary DC motor

so here is the Zeman's washing machine

motor that i salvaged in my last episode

but it is kind of precious to me because

it came with its own transmission and

that is why I don't want to take it

apart instead we will take a look inside

one of these Milliband washing machine

motors here that I happen to have a

couple of and that I also want to use

for future projects it's a little

bulkier a little more rugged but very

similar in build and works on the same

principles so let's take a closer look

at this motor and then take it apart we

have again a pretty small pulley for a

ribbed belt sitting on the pretty

massive motor shaft and then we have

this bulky rectangular stator pack or

package made from transform illumination

that was also welded together on the

backside of the motor we have a plastic

cover and we find a tenpin connector and

one of the main reasons for this video

is to show you how to take a look inside

of one of your motors and find out the

pin out of the connector on your motor

because without that a motor like this

is pretty much useless to you but let's

take a brief look at the nameplate first

and this motor by the way is salvaged

from a 25 to 30 year old miele washing

machine and those are just as easily

available now as the Siemens washing

machines in the last video it also says

moto fu jager but weep on here and that

means that this motor must be regulated

and that is between 300 and 11,500

revolutions per minute which it states

down here and we're going to talk a

little bit more about that later in this

video so I begin to tear down by

removing this plastic shield here and it

seems to serve a double purpose for one

maybe it protects the inside of the

washing machine a little bit from the

dust coming from the brushes inside the

motor but it also makes the motor a

little quieter I think and that is why

we have some insulation material in here

and in the next step I remove this metal

arm here and I do that by unscrewing a

bunch of rather thick Torx screws and

that is something that you didn't see

too often in Germany

thirty years ago but in these older

Miele washing machines you can already

find torques all over the place and on

the backside of the motor we can now see

a plastic shield connected to the motor

by four screws and we remove those as

well but we can see that it's actually

not one piece but two pieces of plastic

that are connected together and by

unhooking the top cover here I can take

it off and we can take a closer look

inside and we see traces leading to our

ten pin connector and we can see that

two of the connectors are pretty charred

we'll take a closer look at that in just

a second and then we can try to wiggle

off this entire plastic shield but you

have to be very careful because you

don't want to damage the motor brushes

that are connected to this plastic part

and here on the backside of the motor

shaft we can also find a small permanent

magnet and that is used in conjunction

with a coil sitting in an plastic shield

in order to read out the motor speed and

control that but we're going to talk

about that in another video but we can

now start to determine and write down

the pin out of that ten pin connector

and for that I have taken this picture

here of another well optically is

slightly different but electrically

identical shield I took this from

another motor of the same type now we

have seen that these two traces here

just lead to this tacho coil and we can

write that down

so let's take a look at those two pins

that are a little burned or charred and

we can see that this is actually a

component that we can pull out here and

what this is is a temperature or a

thermal switch and let me demonstrate

how that works so as you can hear the

continuity tester of the DMM shows us

that this temperature switch is

conductive now I'm heating it up

and as you can see now it has switched

off and we wait for a while until it has

cooled down again and now it's

conductive again so this is just a

safety measure used to protect the motor

from overheating and let's write that

down

our little pin out diagram here as well

the outermost pin on the left side

simply connects to a resistor at 10 mega

ohm resistor that just ends in the air

right now normally this would be

connected via one of the screws that I

removed to the housing or enclosure of

the motor and this is where PE the

protective earth connector would be

connected with that you can also see on

this connector cable for the washing

machine motor but well when you operate

this motor on your desk for example it

might be smarter to connect the

protective earth directly to the housing

and remove that 10 mega ohm resistor but

I don't want to give any conclusive

advice about this yet we'll have to talk

about these safety issues once we are

really running it via the line voltage

in this video I'm kind of doing that but

I'm using an isolation transformer and

when you have an isolation transformer a

connection to protective earth wouldn't

make any sense if you don't know what

I'm talking about watch my video about

the power grid which I linked in the

video description so the 5 pins that we

have determined so far are important for

safety and control aspects of the motor

but they are not crucial if you just

want to power up the motor so let's get

to the really crucial parts and among

those are these two brushes here which

connect to the commutator and power the

armature of the motor and the brushes

are connected to these 2 pins here and

let's write that down in our little

diagram here as well and the symbol that

I use here for the commutator for the

armature is the same one that you use

for ordinary DC motors with permanent

magnets the little black things touching

the circle in the middle reading em are

supposed to be the brushes but this

motor is not a DC motor at least not a

DC motor with permanent magnets it's a

universal motor

and what that actually means well we'll

have to talk more about that but one

thing that it means is that this motor

has field coils or field windings and

they are connected to the remaining pins

so let's explore that a little further

so if we take a closer look at the Stata

pack and the field coils themselves we

can see for actual connectors leading to

the coils and the plastic shield has

four blade connectors but only two of

those connectors actually connect to the

field coils while two of them just go

into these plastic indentations here

connecting to nothing and that is

because two of the connectors on the

field coils are just two ends of the

coils being connected together by this

little piece of metal here and that

simply means that a few coils are

soldered together in series and that

only it's two ends are effectively used

and let out of the motor so we have two

Center tabs or taps of the field coils

if you want that were never used with

this motor though so now we have the

complete pin out and well one of the ten

pins is actually not connected that's

why it says NC you know that pin just

leads to those two blade connectors that

just go into the plastic indentations

and lead nowhere but with a pin out

we're now able for the first time to

power up the motor and I'm now going to

do that in the most simple way possible

and that is by simply connecting the two

field coils and the armature in series

and that is the standard configuration

for the universal motor and well

typically Universal motors are powered

by AC and that is what I'm going to try

now and I'm using my adjustable

isolation transformer here and I will

step up the supply voltage to around

half what it's rated for that is 115

volts out of 230

[Music]

[Music]

so here again we encounter a problem

that I have tried to describe and solve

before in my earlier videos about

washing machine motors and that is if

you have a series wound DC motor or a

universal motor and you power that up

without actively controlling the motor

speed then it will just go through the

roof and the motor will turn faster and

faster and faster and even with only

half the supply voltage and no

mechanical load on the motor shaft

11,500 rpms is left behind very quickly

and this can be harmful for the motor

and is also not very useful for most

applications now I have used a motor

like this successfully before without

speed control and that is when I build

my ducted fan in the ducted fan project

the thing is that you have a constant or

at least a constantly present load and

represented by the air and the air

resistance so that the motor will settle

down at some kind of maximum speed but

well I still operated it at only I think

80 volts or something if you want to

have something like a robot or a vehicle

or anything where you need more

precision control and more torque and

less motor speed then you will have to

control the motor more sufficiently and

it is not enough to just connect it to

the line voltage but I have presented

one solution for that in my video about

how to reuse washing machine motors and

that was in the form of a very simple

thyristors circuit that kept the motor

at constant speeds but it had its

limitations maybe I can still improve it

but right now I'm working on a

completely different approach to solving

this problem so let me show you what I'm

talking about so you can already see me

connecting the motor to my self-made lab

power supply here and I'm doing that

because I want to use two independently

regulated DC voltages to control the

motor let's take a look at the simple

circuit diagram again and let me explain

to you the different options that we

have we had connect

the field coils and the armature in

series and used AC to power the motor I

would call this the universal motor mode

of operation now if we were to use DC

instead of AC then we could call and see

this motor as a series wound self

excited DC motor series wound because

field coils and armature are connected

in series and self excited because the

external field in this data is not

generated by permanent magnets but by

field coils but also self excited

because the current flowing through the

armature is the same current flowing

also through the field coils meaning

that the current through the field coils

or the voltage across the few coils is

not independent of that across or

through the armature and that's why

that's called self excited now if we

were to connect the field coils in

parallel or in shunt with the armature

we'd call that a shunt wound DC motor

and it's again self excited because the

voltage across the two things here the

armature in the field coils are not

independent from each other but if you

separate both and then have two

independent voltage or current sources

powering the armature on the one and the

field call on the other side we're

talking about a separately excited DC

motor it's neither

series nor shunt wound because the two

elements are not connected together

and using this motor as a series wound

DC motor is basically what I did back

with the thyristors circuit because that

actually used DC as well but well the

field coil and the armature were still

connected in series connecting the two

in parallel doesn't really make any

sense

because the field coil has a very low

resistance and it is just not built to

handle the large voltages that we can

put across the armature the few coil

were just overheat and well the

insulation would melt at some point

doesn't really make much sense so the

other option here really is to control

the two separately and let's just try

this in a little experiment the analog

voltmeter shows the voltage across the

armature and the analog ammeter shows

the current flowing through the armature

the reading on this read seven segment

display here is the voltage across the

field coils and the DMM displays the

current flowing through the field coils

we are now applying a voltage across the

commutator and the motor starts spinning

yet other than in the example before it

now will not run away but stay at a

constant speed or at a maximum speed

we're stepping up the voltage across the

commutator and of course the motor

speeds up but again it keeps its speed

and let's go through 30 volts and we can

see the same result

now we can adjust the motor speed and

torque by adjusting the voltage across

or the current through the field winding

let's step up that current and as you

can hear the motor speed goes down and

when we decrease the voltage across the

field winding or into the current

through it the motor speed goes up

thirds of course best if you control

both the voltage across the commutator

and the current flowing through the

field winding but in theory you can have

a fixed supply voltage for the motor and

then a variable voltage or current for

the field winding in order to control

the motor let's make an additional

observation here I now shut down the

current through the field coils

completely zero and pair and I keep a

voltage across the armature and as you

can see the motor is still spinning and

even speeds up but I can now very easily

just grab the shaft and stop the

rotation because there's almost no

torque here so why does that happen

well we'll hopefully understand it later

in this video but in order to make that

happen it's maybe time to learn a little

more about the field coils themselves

why are they even there here we have a

windshield wiper motor just an ordinary

DC motor like it would be used in

automotive applications we open it up

and inside we find an armature that

looks not exactly like the one from the

washing machine motor but it has a lot

of similarities there is a commutator

here for example and commutator brushes

but when we take a look inside

the housing of this DC motor we find

permanent magnets it's what in German is

called a permanent a zig-zag leash to a

motor a permanently excited DC motor may

be not a very usual English word so most

people just call it a permanent magnet

DC motor or something like that but here

for example we have a Brett cutting

machine that I found on the trash the

other day and let's

take that apart and inside we find a

universal motor and this universal motor

again has an armature a commutator

brushes but then this weird state a pack

and a coil sitting on it and the

difference here really is that this

motor is not powered by DC but by AC by

the line voltage and for some reason it

is necessary to have a field coil rather

than permanent magnets if you want such

a motor to be powered by AC well why is

that

well let's take a look at another little

experiment so here we have our state a

pack with the two field coils in series

and that are now going to be hooked up

to our lab power supply right in the

middle I have now placed in ordinary

compass and that is sitting on just a

piece of rubber that puts some distance

between the surface and the compass

itself I will now apply a voltage to of

the field coil and you can see a

rearrangement of the needle and the

rough direction or orientation of the

flux lines inside the stator pack is

like this but when I now reverse the

polarity of the voltage across the field

coils you also see a 180-degree

rearrangement of the magnetic needle so

by reversing the voltage across the

field coils the direction of the current

flowing through these coils is also

reversed resulting in a reversal a

180-degree reversal of the flux lines

inside the stator and this can also be

used for example to reverse the

rotational direction of the armature in

such a motor it is also the reason why

it is possible to use such a motor

rather than an ordinary DC motor with

permanent magnets with AC because when

you connect an alternating voltage an

alternating current with periodically

changing direction will flow through the

field coils also creating a magnetic

field inside that will likewise change

its direction periodically and the same

thing happens at the same time in the

armature

so these two 180 degree reversals are

synchronous and they can't should cancel

each other out

while when you apply an alternating

current to a DC motor with permanent

magnets only the field in the armature

reverses while this field here stays

stationary and therefore no rotation

comes to be so when repurposing a

universal motor as a DC motor like what

I'm doing here it would actually not be

necessary to have field coils you could

just have permanent magnets but one

thing that is good about field coils as

well is that you can strengthen or

weaken the field in the stator which

then results for example in more speed

or otherwise more torque in the rotation

of the shaft as we have seen in the

experiment before so since the washing

machine motors come with field coils we

might as well use them to our benefit

but I wanted to explore the magnetic

field inside a little more so I took now

this very small compass here to see how

the field lines within the stator are

arranged and it seems that they are

pretty much parallel and in order to get

a better picture I also got myself some

iron filings and let's see what that

will look like

well of course it's a little more

complex than just straight lines that

are in parallel to each other but I

think it's pretty close but when we shut

off the current

of course the iron filings collapse but

still if you now insert a compass into

the stator pack there is still a

rearrangement of the needle well and why

is that I mean if I try to stick the

iron filings to this data they just fall

through it well the answer is that there

is still a weak magnetic field here a

remnant magnetic field because some of

the magnetic domains are still pointing

in the direction that was once forced by

one of the few coils when a current was

flowing through them and that is also

the reason why the motor still rotates

and even speeds up when I shut down the

current through the field coils entirely

the remanent magnetism of the state

effect and here I have now completely

removed the field coils themselves so

that you can see what the pack or

package actually looks like and here

again you can witness the reaction of

the needle to the remnant field but

there is one more little thing that I

wanted to do because I said that you

could use a motor like this also with

permanent magnets and I just wanted to

prove that to you so I have now put the

motor back together missing only one

very crucial piece and that is the

stator itself or the stator pack with

the field coils and when I now step up

the supply voltage across the commutator

or armature the current goes up but the

motor doesn't rotate now let's try

something a little different here the

demonstration here we have an ordinary

iron file and on that is sitting a

strong neodymium magnet and I'm just

placing this you're roughly on top of

the motor now let's step up the voltage

again

and it's give up you see that let's give

them what a little momentum with my hand

it's struggling but you can't see that

there is a rotation and that should

suffice to show you that you really only

need a stationary magnetic field when

powering such a motor with DC and you

could add permanent magnets this type of

motor if you wanted to and use it with

DC and not use the field calls at all so

that was today's episode and I hope it

helped you a little bit in maybe

figuring out the pin out of a washing

machine motor that you have lying around

somewhere and that it gives you an idea

what kinds of modes of operation there

are for these types of motors and maybe

also you learn something about the

differences between Universal motors and

permanent magnet DC motors now I'm using

my experimental setup here with the lab

power supply to determine just the right

values to build a much simpler circuit

that I then hopefully will present to

you guys as a simpler solution to this

problem on the other hand I have also

started to work with the Arduino and

build something like a motor shield for

the Arduino so that we can for example

control the speed of these motors by

having sensor readouts for example of

the tacho coil or other sensors like

magnetic sensors that I have used before

and then I'm also working on a

mechanical drivetrain so that I can use

maybe two of these motors as a drive for

a robot or some kind of small electric

vehicle so those are at least three

extremely interesting projects in my

opinion and the next couple of videos

will revolve around this topic again so

if you like these ideas if you like the

little experiments that I've shown you

or other things please let me know in

the comment section and if you can spare

a buck or two well then maybe think

about supporting my channel on

patreon.com /tpa I sure could use it and

it was

helped out a lot so I hope you like this

and to see you soon