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Electronic circuits


Computers
Devices and improvements for a computer
  • 5 volts from the port RS-232

  • Acceleration processor replacement quartz

  • Automatic restart the computer when buzzed

  • Circuit to connect the modem to the AVU

  • Connect sound card to a phone line

  • Connecting computers via the COM ports with two wires

  • Connecting sound card with the musical instrument

  • Connecting to a computer remote control

  • Connectivity at IR Rays

  • Desktop laser layout regard to 10Mbit

  • Diagnostic board "Port 80"

  • Do not hurry away outdated computer

  • Does computer need a wheel?

  • Examples of circuits for LPT

  • Fan speed regulator

  • Improved computer power supply

  • Indication cooler failure

  • Infrared for a computer

  • Infrared port

  • IR-port for pc which is connected to motherboard

  • Joystick by own hands

  • Joystick for games on the PC

  • Making gamepad for the PC

  • Making the steering wheel and pedals to the PC

  • MIDI-клавиатура

  • Modem Filter

  • Pins of all computer connectors

  • Player CDs based on CD-ROM

  • Player compact-discs from CD-ROM

  • Reading information from the LPT port

  • RS232 by radiochannel

  • Running a computer with the PRC

  • SIM card reading devices (3 versions)

  • Simple Infrared

  • Tester computer twisted pair

  • The circuit of "Easy Mouse"

  • The system connect two computers based on the JDM p JDM

  • Universal frequency modem

  • Upgrading motherboard (Appendix coefficients multiplying)

  • Virtual frequency meter

    Total 40 pages


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