USB, Ethernet, WiFi (802.11b), 802.15.4 Wireless, and RS-232 Serial Relay Controller Boards Allow Computer Controlled Switching using many connectivity options. We have a large number of relay controllers for high-current computer controlled switching as well as low-current signal switching. Relays typically have three connections: Normally Open, Common, and Normally Closed. In most applications, you will connect external devices, such as lights and motors, between the Common and Normally Open lines. When the relay is activated via software, your device is powered. Relay controllers are ideal for activating motors, lights, solenoids, and much more...all under computer control. Click on product photos below for additional information.
Computer Control
Stand-Alone
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