Time delay relay - soldering kit

EK004 is a multi-functional time-delayed relay. Each time the trigger input (IN) is grounded and each time the circuit is powered on, the relay will switch and hold for a preset time length, set by the trimmer. When the time runs out, the relay switches back again and a new cycle can be initiated. Since the relay has both a normally open and a normally closed contact, this kit can be used for either delaying turn on or turn off for a connected apparatus. This kit will always begin with a delay when powered on. To prevent an initial delay cycle, the trigger input should be tied to V+ at start-up. The delay time is adjustable from about 120ms to 12s. For longer delay times, replace capacitor (C4) with a higher capacitance value and/or the resistor (R2) with a higher resistance value.

* Supply voltage: 12VDC
* Current draw: 20mA (relay inactive) / 50mA (relay active)
* Delay time: 120ms - 12s
* Relay contact: 1-pole SPDT / 10A 250VAC, 10A 30VDC
* Dimensions: 38.1 x 38.1 x 20mm * Mounting holes: c-c 33 x 33mm, ø2.54mm