This category is our most popular by far. In here you can find relays, timers, switches etc. to perform almost any electric task. Our most popular item is the Parallel Port Relay Switch Board.
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$59.95
| Auto Roll 10 Channel RF Remote Control | 4 Channel RF Remote Control Relay Board with Auto Roll
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$37.95
| Auto Roll 2 Channel RF Remote Control | 4 Channel RF Remote Control Relay Board with Auto Roll
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$39.95
| Auto Roll 4 Channel RF Remote Control | 4 Channel RF Remote Control Relay Board with Auto Roll
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$17.95
| Count Down Timer with Relay Output | Timer kits are an ever popular item with the hobbyist. One of the main methods used is the ever-popular 555 timer IC.
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$12.95
| Dual Hi/Lo Switched Relay Board | There are many applications where you need quick availability of a relay for connection to a particular piece of apparatus. We found in developing our kits that we always needed to have a relay mounte...
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$19.95
| IR Beam Sensor | This kit uses an infrared beam to monitor door & passage-ways or any other area.
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$18.95
| InfraRed Remote Control Switch | A very useful kit. Everybody has Infra Red transmitters at home - TV remote, video remote, CD remote, etc. Use ANY Infra Red remote to toggle this switch on or off.
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$42.95
| Infrared Remote Relay board and Remote 12 Channel | Low cost 12 channel Infrared Remote Control with relay board
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$22.95
| Light Activated Relay Switches | This kit has three separate circuits, including circuit boards, that allow you to control an electrical device on the amount of light that the circuit senses. For example turn on a Flood Light when it...
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$19.95
| Multi Mode Timer Circuit | This timer kit contains seven different timing modes using only ONE IC and some support components on a single-sided PCB.
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$29.95
| Parallel Port Relay Board | 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. T...
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$44.95
| Parallel Port Relay Switch Board | 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. T...
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$19.95
| Presettable Down Counter Kit | This is a low cost 4 digit presettable down counter with output and reset. The count input can be used for both low and high speed applications.
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$49.95
| Serial Port Relay Board (Serial Port I/O Module) | 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.
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$9.95
| Serial Port Relay Board Upgrade Kit | 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.
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$12.95
| Simple PCB Relay (Printed Circuit Board) | The primary function of this Relay Board is to turn devices on or off. It's simple!
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$17.95
| Sound Activated Electronic Switch | Adjust the sensitivity of this circuit to control a Relay that can turn on whatever is connected to the contacts of the relay. Very practical circuit for a variety of projects. Turn on a light when yo...
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$14.95
| Sound Voice Activated Relay Switch | This mini-VOX - voice operated relay - is based on a circuit published in Silicon Chip, 9/1994, p31.
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$24.95
| Timer Circuits Relay Switches | Timer circuits are handy for many experimenters projects, not to mention the photo lab. This kit has three separate circuits that can be used individually or together. Each circuit has a separate 5 Am...
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$12.95
| Touch Switch Relay Board | 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 t...
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$12.95
| Universal Timer Relay Switch Kit | Set timer for anywhere from a few seconds to about 15 minutes, control A.C. appliances; it will beep and trigger a relay when it has timed down. May be used for dark room or PC board exposure timer, e...
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$19.95
| Up/Down Counter Kit | This is a low cost 4 digit Up/Down Counter. Count range is from 0000 to 9999 (counting up) or 9999 to 0000 (counting down).
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