Circuit: Board Maps

This LCD expansion board upgrades your exisiting BW PLL exciter / transmitter so that it has an LCD readout and easier frequency adjustment.

You can program this stand alone controller via PC Serial Port. Simply connect a serial cable from your computer to the connector on relay board.

Low cost 12 channel Infrared Remote Control with relay board

You can program this stand alone controller via PC Serial Port. Simply connect a serial cable from your computer to the connector on relay board.

The company HiTechnic has recently released a new NXT Prototyping Board

Allows for connection to Personal Computers USB (Universal Serial Bus)

Both a touch and a contact switch are built on one PC board so that the builder can see how each works. A battery can power the contact switch but you'll need an AC power supply for the touch switch to work well. The circuit switches a relay with a 3 Amp

This is the Brodcast Warehouse All-in-One PCB 1 Watt FM Transmitter. This item has a built in limiter / compressor & stereo encoder!

Use an old PC as a dedicated controller to turn on or off devices lab or radio shack. The circuit includes eight relays controlled with (included) software for either DOS or Windows 3.1. The kit is a boon to the Science Fair project, laboratory experiment

Use an old PC as a "dedicated controller" to turn on or off devices lab or radio shack. The circuit includes eight relays controlled with (included) software for either DOS or Windows 3.1. The kit is a boon to the Science Fair project, laborator