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

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

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