Organize and Share your Electronics the way you want. Sign-Up for a free account now. It takes only 30 seconds!

Serial mouse interface for Commodore 64

Serial mouse interface for Commodore 64

The interface described in this article is based on a Microchip PIC16c84 microcontroller.
A lot of different PC mouse designs were created and also a lot of them are still present. In short, you’ll find three main types of PC mice: serial, PS/2 and USB mice, connecting to the RS-232, a dedicated PS/2 mouse and the USB port, respectively. Some mice are ‘combo’, thus they can be connected to both serial / PS/2 or PS/2 / USB ports (usually, with a small adapter which is shipped with the mouse). The latters are clear designs, but the serial one is not so much obvious. The serial port was in general designed for communication and not for connecting a standalone external device. The mouse needs some current for its operation. Since there is no dedicated PS voltage on the serial port, the current is drawn from some unused signal outputs (that are set to the appropriate level by the mouse driver software on the PC). This is a bit suspectible, but since these mice are usually manufactured with low power technology, the supply current is relatively small, about some 10-15 milliampers.

Visit Here for more.







 

More Articles to Read

Blinking Christmas Lights
Blinking Christmas Lights
Wrist thrusters let you fly through the water effortlessly
Wrist thrusters let you fly through the water effortlessly
Bertan/Spellman 225-20R HV power supply teardown
Bertan/Spellman 225-20R HV power supply teardown
Blinking Christmas Lights
Blinking Christmas Lights
Adjusting clock with alarm, hygrometer & thermometer on 1.8″ ST7735 display
Adjusting clock with alarm, hygrometer & thermometer on 1.8″ ST7735 display
Adding an “extra sense” with rangefinders
Adding an “extra sense” with rangefinders
This wireless game controller looks like a rug
This wireless game controller looks like a rug
How to run your ESP8266 for years on a battery
How to run your ESP8266 for years on a battery
Calibration of a 3-Phase Energy Meter Board on the ADE7754
Calibration of a 3-Phase Energy Meter Board on the ADE7754
Making beats on a tiny Arduino DJ controller
Making beats on a tiny Arduino DJ controller
Qinsi-QS5100 Sn63Pb37 solder profile
Qinsi-QS5100 Sn63Pb37 solder profile
Water Detection System
Water Detection System
Professional Hi-Fi 15W Tube Amplifier circuit
Professional Hi-Fi 15W Tube Amplifier circuit
This Arduino machine will judge how sick your ollies are
This Arduino machine will judge how sick your ollies are
Turn an old payphone into a boombox for ’90s hits
Turn an old payphone into a boombox for ’90s hits
Big F’n 3D printer build
Big F’n 3D printer build
Temperature alarm for boiling milk
Temperature alarm for boiling milk
QuadBot is a 3D-printable walking robot for everyone
QuadBot is a 3D-printable walking robot for everyone
MicroConverter I2C Compatible Interface
MicroConverter I2C Compatible Interface
An Arduino tachometer for your older vehicle
An Arduino tachometer for your older vehicle

Top


Shares