qoistoochee128

Keyboard puppet system-Laser310 computer keyboard simulation controller

Overview

At first, the original plan was to use it for Laser310. The way to achieve it was to use such a set of designs that could realize electronic switches without electromagnetic induction between the pins.

In this way, simulated keyboard input can be achieved, and theoretically there is no risk.

Its schematic diagram is as follows (original and new version)

As you can see, the keyboard part is a set of 8*6 pins. So I also used the combination of CD4066 and CH423S to realize a design that only requires 4 pins to control 40+ pins, and controls the line switch very well.

However, it should be noted that CD4066 has an internal resistance of 70 ohms, which is neither high nor low, but it may still cause interference to the signal. This is why it was not successfully applied to the Laser310 in the end.

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2025-06-24 09:53:39

Wave Soldering Defect Analysis
1.POOR WETTING: 　　This is an unacceptable defect, only part of the solder joint is wetted. The reasons and improvement methods are as follows: 　　1-1. External pollutants such as oil, grease, wax, etc.
12864 shows large numbers
In addition to image modulo, is there any way to make 12864 display larger characters and numbers, such as 16*32?
Example Code for CCS4
Does anyone have examples for CCS4? After installing CCS4, some tutorials say there are examples in "C:\Program Files\Texas Instruments\ccsv4\C6000\examples", but there are none in the installation di
FPGA division implementation?
In digital signal processing, FPGA often needs to implement division. We know that there is a division function in the FPGA library function, but it is still not as convenient as designing it by ourse
Please ask the moderator, how to use assembly to write interrupt service in IARSTM8
I would like to ask the moderator, how to point to the corresponding interrupt vector in the interrupt service routine written in assembly in IAR STM8?
Wince Bluetooth file sending problem
{ WSACleanup(); return FALSE;

Datasheet More

Circuits More