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OVER 10.000 SCHEMATICS & DIAGRAMS
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1 Second Time Base From Crystal Osc. 16 Bit PC Serial Port Receiver (CMOS) 160 Baud ALDL Hardware Interface
24 Line Parallel Interface for the PC (540k) Based on the older 8255A, this simple parallel interface provides 24 I/O lines. 24-bit parallel port interface with 8255 (Commodore projects) 24-line PC digital interface (PDF)
32 Bit Serial Receiver (57.6 K Baud TTL & CMOS) 32 Bit Serial Receiver (57.6 K Baud TTL & CMOS) 4-channel 8-bit analog-to-digital converter for PC
9-pin null modem cable
A PC-Based LowFER Frequency Synthesizer
A Serial Infrared Remote Controller
Alternative PC-Mouse
Analog Signal Acquisition for PC Printer Port
Analog Signal Acquisition for PC Printer Port Analogue to digital converter for PC serial port
Apple II/II+/IIe IDE Drive Interface
Assorted computer interface circuits
AT PC Power Supply 1
AT PC Power Supply 2
AT PC Power Supply 3
AT PC Power Supply 4
AT PC Power Supply 5
Audio-video switch. This is an 8-input x-output audio/video switch module to be controlled from a computer, for example from the parallel port. Barcode scanner
Basic PIC 16C84 programmer for PC parallel port by David Tait Basic Stamp I & PC Relay Controller
Baycom Terminal Diagram (modem) BIPOLAR STEPPER MOTOR CONTROL CIRCUIT. In this circuit, a potentiometer controls both the speed and direction of a small bipolar stepping motor like those found in many 5 1/4" floppy disk drives. Note that the bipolar motors are distinguished from "unipolar" types, in that bipolar units have two coils instead of four, and four wires instead of five. Build logic gates using discrete parts Build your own iRDA SIR Transceiver (Dongle) using MCP2120
Commodore 64 24-bit parallel port interface with 8255
Compter microphone
Computer controlled IR device (hardware/software) Computer power supply 1 Computer power supply 2 Computer Speaker Amplifier (12k) This three-transistor amplifier delivers about 2 watts to an 8 ohm speaker. Computerised Morse code generator/transmitter Computerize Your Room/Home Connect other circuits to PC joystick port
Connect two CD-ROM drives to one soundcard
Connect two CD-ROM drives to one soundcard
Control 120VAC relay with TTL Convert Atari-style joystick to PC joystick port
DB-9 Connector to DB-25 (both RS-232)
Digital Signals Decoding Interfaces
Digital to analogue converters for PC parallel port
Digital to analogue converters for PC parallel port Dive computer interface
Drawing power from a PC Serial port Driving a relay with a CPU EEPROM programmer
Ericsson phone to PC serial port interface
Ethernet Chips Fake Joystick circuit
Fax to modem interface
Filtering PC bus POWER Frequency Measurements Using PC Genius Mouse schematics
Get power out of PC parallel port
Get power out of PC parallel port
Get power out of PC parallel port Get power out of PC RS-232 port
Get power out of PC RS-232 port
Get power out of PC RS-232 port Getting power from RS-232 interface
GPS receiver (Gamin, Eagle etc) to PC interface cables
HamComm Interface
HammComm 3.0 (Comparator) Receive Circuit also for use with JVFAX and PKTMON- WB5NBQ Headphone driving circuit for soundcards
Headphone driving circuit for soundcards
Hi-Fi PC Speaker System
Homebuilt RS232 LCD Interface
How to construct Garmin GPS receiver interface cables
How to get power from PC to your circuits
How to get power from PC to your circuits HWB (Hardware Book) by (C) Joakim Ogren (Connectors, Cables, Adapters, Circuits) I2C printer port adaptor
IBM PC joystick IDE IDE hard-disk interface for Amiga 500
iLINK Interface
Interface cable for Casio QV-200 digital camera
Interfacing 16x2 character :LCD to parallel port
Interfacing PC sound card to SSB rig
IRDA iRDA printer adapter
IRPR/CENTRONICS Convertor ISA 48 I/O digital card
Isolated Full Duplex RS232C Interface
Joystick Interface Projects Joystick Interfaces Joystick port interface projects Jupiter card programmer
K7SZL'S BASIC+ HAMCOMM Interface LapLink/InterLink Parallel Cable Laptop Computer Serial Port Power Booster
Light show. Computer parallel port can be used for many purposes. One of them could be user circuit control, for example light effect. Linux Infra-red Remote Control (LIRC)
Lpt to lpt Mac Serial Port (RS-422 DIN-8) to RS-232 DB-25
Midi adapter for soundcard, with indicators. by george shepelev 2:461/124@fidonet MIDI Interface for Soundblaster compatible cards Midi-keybord Midibox 64
Midikeyb Modem AT Command Set Modem Rockwell model 4A144IM int Modem Rockwell RCV336/ACF model V1433VQR ext.
Modem Rockwell RCV336/ACF model V1433VQR ext. More accurate PC/AT clock
More accurate PC/AT clock Null Printer Adapter
NullModem 25-25pin (COM-COM) NullModem 9-25pin (COM-COM) NullModem 9-9pin (COM-COM) Parallel (Printer) Port Interface
Parallel (Printer) Port Interface Parallel port ADC based on MAX147
Parallel port dongle (12C508A) By using the PIC 12C508 MCU from Microchip, we can make a cheap and simple hardware protection key (dongle). Parallel port interfacing made easy
Parallel port interfacing made easy Parallel port relay interface
Parallel Port Relay Interface Circuit Parallel port servo controller
PC infrared iRDA interface using TFDS 4500
PC interface for point controller
PC Serial and Parallel Port Software and Interfaces
PC serial port receiver
PC speaker volume control circuit
PC speaker volume control circuit
PC thermometer
PcGenerator. Turn your PC into a low frequency signal generator. Frequency range from 0.5-25000 Hz PCI to ISA converter
PIC 16C84 Serial mode programmer. PIP Programmer (PROCheap) Power from RS-232 port
Power supply unit Scheme XT/AT (scheme and description) (variant 2) Printer port ADC
ProFLASH. (Atmel Flash Micro Programmer) by Peter Dannegger Programmer. BiDiPro. version 1.2a. Produced by Eduard Panchenko. Design & PCB routing by P.E.co. (part1) schematics (160k) Programmer. BiDiPro. version 1.2a. Produced by Eduard Panchenko. Design & PCB routing by P.E.co. (part2) (277k) Programmer. BiDiPro. version 1.2a. Produced by Eduard Panchenko. Design & PCB routing by P.E.co. (part3) soft (15k) Programmer. BiDiPro. version 1.2a. Produced by Eduard Panchenko. Design & PCB routing by P.E.co. (part4) (194k) Programmer. ByteBlaster. For Alter chips. Schematics (3.5k) Programmer. ByteBlasterMV. For Alter chips. (3.5k) Programmer. ComPIC. 16C61/62x/71x/8x/64/65/74, 14000. Schematics. part 1 Programmer. ComPIC. 16C61/62x/71x/8x/64/65/74, 14000. Schematics. part 2 Programmer. ComPIC. 16C61/62x/71x/8x/64/65/74, 14000. Software. part 3 Programmer. PICProg by Bryan J. Rentoul. Version 3.0. Schematics+documentation. (50k) Programmer. ProPIC. version 3.0. Schematics Programmer. ProPIC. version 3.0. Soft Programmer. Turbo 6. adapter K. Programmer. Turbo 6. adapter M. Programmer. Turbo 6. schematics (390k) Programmer. Turbo 6. soft version 6.67 (180k) Programmer. Turbo 6. soft version 6.67 (190k) PS/2 to Serial (COM) Mouse Adapter RGB oo Monochrome converter - Matches impedance of PC to CCTV monitor
RS-232 line monitor and loopback cables
RS-232 Protocol Analyser
RS-232 serial line surge protectors RS-232 surge protection
RS-232 surge protection
RS232 - Lowe HF-225 interface
RS232 to IrDA convertor using Vishay TOIM3232
RS232C Level Converter
Schematic of a standard PC joystick
Scheme and power supply unit description XT/AT (variant 1) SDSL Chip Set. xDSL- chip set's Sega 3D glass interfacing circuits
Sega 3D glass interfacing circuits
Seiko EPSON - Scanners - Users' Manual in PDF format: GT - 5000, GT - 8500, GT - 9500, GT - 10000, GT - 12000, Perfection 610, Perfection 640u, Perfection 1200u, Perfection 1240u, Perfection 1640u, Expression 1600, FilmScan 200. Serial (COM) to PS/2 Mouse Adapter Service manual printer EPSON COLOR INKJET PRINTER Stylus-500 Service manual printer EPSON COLOR INKJET PRINTER Stylus-600 Service manual printer EPSON DFX 8000 Service manual printer EPSON EPL- 5700L/ 5700i Service manual printer EPSON LQ-1050 Service manual printer EPSON LQ-300 Service manual printer EPSON LQ-570+1070 Service manual printer EPSON LQ-570, LQ-580 Service manual printer EPSON LQ-670 Service manual printer EPSON LX-300 Service manual printer EPSON LX-300+ Service manual printer EPSON Stylus Color 300 Service manual printer EPSON Stylus Color 400 Service manual printer EPSON Stylus Color 440 Service manual printer EPSON Stylus Color 700 EPSON Stylus Color EX Service manual printer EPSON TERMINAL PRINTER Stylus 1000 Service manual printer HP LJ 1100 Service manual printer Panasonic kx-p1150 Service manual printer Panasonic kx-p6500 Service manual printer SAMSUNG ML-5000 Service manual printer SCR2438E Service manual printer SCR3232E Service manual printer STAR LC-1511 Service manual printer STAR NX-1500 (STAR LC-15) Service manual printer STAR NX-2415II Service manual printer STAR XR-1000 Service Manuals printers Star Micronics in PDF format: AR1000, ASF, LC100P, LC1511, LC240, LC4511, LC7211, LC8021, LC8211PT, LC8211, LC8521, LC90, LS04, LS05, LS08PL, NX1000, NX1001, NX1020, NX1040, NX1500, NX2400, NX2415, NX2415PL, NX2420, NX2430, NX2440, NX2450, NX2480, PR811P, SJ144, SJ48, VS12PL, WIN4, WIN800, XB2410PL, XB2410PL, XB2410PL, XB2420, XB24252T, XR1000PL, XR1020. Simple MIDI tester
Simple MIDI tester Simple PC SmartCard reader
Simple printer emulator adapter
Simple printer emulator adapter Simple Programmer. AVRProg. for 1200 series (23k) Simple RS-232 serial port buffer circuit
Simple RS-232 serial port buffer circuit Sound Blaster Microphone Preamplifier
Sound Blaster Microphone Preamplifier
Sound Blaster Preamp - Fixes that well known problem and needs no batteries Sound Card Interface with Tone Keyer
Sound Card Interfacing for RTTY, PSK31, and SSTV SSTV modems Stepping Motor Driver - Minimalist circuit uses one CMOS gate and is reversible Stereo Audio mini MIXER MIC-LINE for PC Audio Card The KD2BD Pacsat Modem
Understanding Computer Technology (Joke) Unilogic v1.42- "realtime" oscilloscope, frequency meter (LPT) UNIPOLAR STEPPER MOTOR CONTROL CIRCUIT. This circuit controls a small, four-phase, five-wire, unipolar stepper motor, commonly designated the "KP4M4-001." This type of motor was used in many 5 1/4" floppy disk drives in older computers. Now obsolete, such disk drives are often available on the surplus market for a small fraction of the motor's original cost. Upgrade cga/ega monitors to vga/svga USB to RS232 Dongle
Use disk drive motors in our projects Users' Manual printers Seiko EPSON in PDF and MS Word formats: EPL-5700, DFX-8500, FX-2180, FX - 880 \ FX - 1180, Stylus PHOTO 700, Stylus PHOTO EX, Stylus COLOR 850, Stylus COLOR 850 (in Russian), DFX - 8000, EPL - 3000, EPL - 5000, EPL - 9000, LQ - 570, LX - 300, Stylus 1000, Stylus - 800, Stylus COLOR, Stylus COLOR 400, Stylus COLOR 600, Stylus COLOR 800, TM - 290II, TM - 300, TM - 930II, TM U-370. Using the joystick port as general purpose input
VGA converter for video projectors and fixed frequency monitors
VGA converter for video projectors and fixed frequency monitors VGA to TV converter
VGA to TV converter Virtual Frequency Meter WatchDog for ISA Bus
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