CEK KOMPONEN PART 2 , MENGUKUR TRANSISTOR BJT

Summary

This video tutorial demonstrates how to measure a BJT (Bipolar Junction Transistor) using an analog multitester. The presenter walks through the process of testing both NPN and PNP transistors, including types like TIP31, C945, A1103, and A733. The steps involve using the multitester to check for normal movement of the needle when measuring the transistor's base, collector, and emitter pins. The guide emphasizes ensuring no leakage or abnormal needle movement, offering a simple method to test transistor functionality. Viewers are encouraged to try the technique and share any alternative methods for testing transistors.

Takeaways

• 😀 The video demonstrates how to measure a BJT transistor using an analog multitester.
• 😀 The presenter has prepared various transistor types for measurement, including NPN and PNP types.
• 😀 For accurate measurements, the multitester's selector should be set to 'x1k' for better sensitivity.
• 😀 The multitester's needle should be calibrated to zero before starting measurements for accurate readings.
• 😀 To measure a transistor, the black probe should be connected to the base, and the red probe to either the collector or emitter.
• 😀 If the needle doesn’t move during measurement, the transistor may be faulty.
• 😀 A normal measurement should show the needle moving within a certain range, indicating the transistor is functioning correctly.
• 😀 After measuring the first leg, the probes should be switched to the next legs (collector and emitter), with the needle showing expected movement.
• 😀 For PNP transistors, the process is the same, but the red probe connects to the base.
• 😀 The video encourages viewers to share any better methods for measuring transistors to improve collective knowledge.

Q & A

What is the purpose of using an analog multitester in this video?

The purpose of using an analog multitester in this video is to measure and check the functionality of a BJT (Bipolar Junction Transistor), specifically the NPN and PNP types, to determine if the transistor is working properly or faulty.

Why does the presenter prefer using the x1k setting on the multitester?

The presenter prefers using the x1k setting because it offers better sensitivity compared to higher ranges like x100k. The x100k range is too sensitive and can lead to confusing readings.

What should you do before measuring the transistor with the multitester?

Before measuring, you should calibrate the multitester by zeroing the needle. This ensures accurate readings and helps in interpreting the needle's movement correctly.

What does it mean if the needle of the multitester does not move during the measurement?

If the needle does not move during the measurement, it indicates that the transistor is faulty or broken. The current cannot flow through the transistor as it should.

When measuring an NPN transistor, what is the first step to check its functionality?

The first step is to place the black probe (negative) on the base of the NPN transistor and the red probe (positive) on the collector. If the needle moves, the transistor is functioning properly.

How can you tell if an NPN transistor is damaged while measuring?

An NPN transistor is damaged if the needle does not move when measuring between the base and collector, or if the needle moves too much or too little during the measurements, indicating leakage or a short circuit.

What is the significance of not touching the probes while measuring the transistor?

Not touching the probes while measuring is important because physical contact with the probes can introduce interference or resistance, leading to inaccurate readings.

What is the proper way to test a PNP transistor using the multitester?

For a PNP transistor, place the red probe (positive) on the base, then measure between the base and the collector, and between the base and the emitter. The needle should move when measuring the base, and it should not move when measuring the collector and emitter, indicating that the transistor is healthy.

What should the needle on the multitester indicate when testing the emitter of a transistor?

When testing the emitter of a transistor, the needle should show slight movement, indicating that the transistor is functioning correctly. If the needle does not move or moves erratically, the transistor is likely faulty.

Can the method described in the video be used for all types of transistors?

The method described is specifically for BJTs (Bipolar Junction Transistors), both NPN and PNP types. It may not be suitable for other types of transistors such as Field-Effect Transistors (FETs), which require different testing methods.