PC related schematics

Posted by Author makecircuits

160 Baud ALDL Hardware Interface
24-line PC digital interface (PDF)
3-axis stepper motor controller for PC parallel port
9-pin null modem cable
A Serial Infrared Remote Controller
Analog to Digital Conversion (ADC) and Communicating with a PC
Apple II/II+/IIe IDE Drive Interface
Commodore 64 24-bit parallel port interface with 8255
Compter microphone
Convert Atari-style joystick to PC joystick port
Digital Signals Decoding Interfaces
Dive computer interface
Ericsson phone to PC serial port interface
Get power out of PC RS-232 port
How to construct Garmin GPS receiver interface cables
iLINK Interface
Interfacing 16x2 character :LCD to parallel port
Interfacing PC sound card to SSB rig
Parallel port relay interface
Parallel port servo controller
PC based thermometer based on Dallas DS1621
PC electrically isolated RS422 interface using SN75176B or MAX485
PC electrically isolated RS485 interface using MAX487 or SN75176B
PC interface for point controller
PC serial port receiver
PC thermometer
Relay interface add-on board for PC
RS232 - Lowe HF-225 interface
RS232 DB-9 switch to flip betw1een tw1o serial ports
RS-232 line monitor and loopback cables
RS-232 Protocol Analyser
RS-232 surge protection
RS232 to IrDA convertor using Vishay TOIM3232
RS232C Level Converter
Schematic of a standard PC joystick
Sega 3D glass interfacing circuits
Short circuit protected power supply from PC 12V supply
Simple RS-232 serial port buffer circuit
SmartCard PC Emulator
Sound Blaster Microphone Preamplifier
Sound Card Interface with Tone Keyer
Stepper motor controller for PC parallel port
Supply Derives Power From 3-Wire RS-232 Port
Temperature sensor for PC
The KD2BD Pacsat Modem
Using the joystick port as general purpose input