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- Intermittent infinite loop Countdown switch relay
- Control time by STC stc15w202s MCU, fully reprogrammable.
- Lead out serial port pins, can reflash board firmware, programming guide can see here.
- Can set 0~999 seconds (16-17 minutes) after to turn on relay. (also can program to 999 minutes or maybe hours in more complex level)
- Also can set 0~999 after to turn off relay or hold on relay.
- On board segment display to show timing.
- Input voltage 7-25V via 7805 linear regulator.
- On board songle SPDT relay 10A /28VDC or 240VAC.
- One relay signal led indictor, one power indicator.
- Two config buttons.
- On board jumper, set relay active voltage to 5V. Switching jumper can support other voltage relay.
- On board optical coupler, isolate relay signal.