Relays, Remotes, Switches & Timers

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.
4 Channel RF Remote Control Relay Board with Auto Roll
4 Channel RF Remote Control Relay Board with Auto Roll
4 Channel RF Remote Control Relay Board with Auto Roll
Timer kits are an ever popular item with the hobbyist. This uses a 555 timer IC and goes from 8 seconds to 8192 seconds.
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...
This kit uses an infrared beam to monitor door & passage-ways or any other area.
Power on/off almost anything with this infrared controlled electronic switch. Some spell it Infared!
Low cost 12 channel Infrared Remote Control with relay board
Three relay-based electronic switching circuits that switch according to light levels.
This timer kit contains seven different timing modes using only ONE IC and some support components on a single-sided PCB.
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 Window...
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 D...
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.
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.
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 primary function of this Relay Board is to turn devices on or off. It's simple!
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. Tur...
This mini-VOX - voice operated relay - is based on a circuit published in Silicon Chip, 9/1994, p31.
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...
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 fo...
Set this relay-based timer for anywhere from a few seconds to about 15 minutes so that you can time on/off almost anything.
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).