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The kit switches on/off a relay at light and darkness (shadow). Usage: Whenever the light beam of a lamp on doors, windows, etc. is interrupted by a person, the relay activates. Also suitable as twilight switch. Can be used to open chicken hatch at dawn or operate a lamp at dusk etc.   ..

Switches a relay on or off depending on a preset temperature. Ideal as thermostat, ice alarm, fire detector, etc. it is possible to operate lamps, sirens or devices with loads up to 3A! Requires SolderingOperating Voltage 6-14V DCRelay Current - 3A @ 25VTemperature range: -30 to +150CDimension..

Adjustable time switch for switching operations from approx. 1 sec. to approx. 40 minutes. The device switches on after pressing the key and switches off again when the adjusted time has expired. The lapse of time may be interrupted any time with the reset key.Requires SolderingRelay operate..

Relay switch card 12 V/DC Kemo B197 is activated upon currents as low as 5mA. When the low current is detected it turns on the relay to allow up to 3A of current to flow. This is an ideal project for use with other kits that have low current outputs such as lamp or LED flashers etc. Allowing you to ..