Bagaimana Cara Kerja Keyboard pada Komputer?⌨️ Perbedaan Keyboard Basic & Mekanikal

Summary

This video explores the engineering behind different types of keyboards, from a cheap, mass-produced model to a high-end mechanical keyboard. It details the simple yet effective components of the budget keyboard, including rubber sheets and a small microprocessor, which enable it to function at a low cost. In contrast, the mechanical keyboard features more complex components like mechanical switches, LEDs, and detailed circuitry, explaining its higher price. The video highlights the trade-offs between cost and functionality, providing insights into the design and mechanisms of these commonly used devices.

Takeaways

• 😀 Keyboards are engineered to be cost-effective, with minimal components that allow for mass production at a low price.
• 😀 A basic, low-cost keyboard contains just 148 parts, including a rubber membrane, plastic sheets, a circuit board, and a microprocessor.
• 😀 The microprocessor in the cheap keyboard sends 3 volts to the bottom layer of the plastic sheet, while monitoring input from the top sheet's rows.
• 😀 The keyboard works through a matrix of rows and columns where each key's input is determined by the interaction of the top and bottom layers.
• 😀 A major issue with the matrix design is the inability to distinguish key presses when multiple columns are active simultaneously. This is solved by rapidly cycling through the columns.
• 😀 A more efficient solution for key identification involves sending a signal to one column at a time, reducing battery consumption and power usage.
• 😀 A mechanical keyboard, much more expensive than the basic model, uses a larger circuit board and mechanical switches that create a tactile feedback and a distinct clicking sound when pressed.
• 😀 Mechanical switches include a unique mechanism with a stem, slider, spring, and two metal contacts, which generate the 'click' sound when the contacts meet.
• 😀 The tactile experience in mechanical keyboards is vastly different from rubber membrane keyboards due to the movement of mechanical parts, giving it a premium feel.
• 😀 The increased cost of mechanical keyboards is attributed to the more complex PCB, the mechanical switches, and the tactile feedback provided with each key press, which can justify the higher price based on user preference.

Q & A

What is the primary focus of the video script?

The primary focus of the video is to explore the design and cost-saving engineering of two types of keyboards: a low-cost rubber dome keyboard and a more expensive mechanical keyboard.

How many parts are involved in the construction of the cheap keyboard?

The cheap keyboard is assembled from 148 parts, but only eight of those parts are critical for its function, allowing for significant cost savings.

What are the key components of the low-cost keyboard?

The key components of the low-cost keyboard include a rubber sheet with domes under each key, conductive plastic sheets, a simple microprocessor, batteries, and a small circuit board.

What is the role of the microprocessor in the cheap keyboard?

The microprocessor in the cheap keyboard is responsible for supplying a 3-volt power signal to the conductive tracks and actively monitoring the input from the keys when pressed.

How does the matrix design of the cheap keyboard work?

In the matrix design, the bottom sheets form columns and the top sheets form rows. The microprocessor sends voltage through the columns and monitors the rows to determine which key has been pressed.

What problem arises with the matrix design and how is it solved?

The problem with the matrix design is that when voltage runs through a column, it can be difficult to pinpoint which specific key in the row is being pressed. The solution involves quickly cycling through the columns to isolate the active one and using timing to determine the exact key.

Why does the cheap keyboard consume more battery with the matrix design?

The matrix design consumes more battery because the microprocessor continuously cycles the 3-volt signal through all the columns, which drains power over time.

How does the microprocessor manage power more efficiently in the improved design?

In the improved design, the microprocessor sends a signal that only activates one column at a time, reducing power consumption and extending battery life.

What is the main feature of the mechanical keyboard that increases its cost?

The main feature of the mechanical keyboard that increases its cost is the complex switch mechanism under each key, which includes individual mechanical switches, springs, and metal contacts that provide tactile feedback and audible clicks.

How do mechanical key switches work compared to the rubber dome system?

In mechanical key switches, when a key is pressed, a moving slider inside the switch makes contact between two metal contacts, completing the circuit and generating the characteristic click sound. In contrast, the rubber dome system uses a rubber sheet to push a conductive point onto a circuit, which is simpler and less expensive.