首页->--dark-activated
黑暗激活LED或灯闪光电路--Dark-activated LED or Lamp FlasherSimple photo-sensitive circuit3V battery supplyParts: R1_____......
This handy little circuit can tell the difference between darkness and light, making it very useful for switch......
Touch-activated Alarm,Attach trigger wire to the latch nut/bolt Isolate this Latch from any other metal parts ......
An infra-red or wireless remote control has the disadvantage that the small, handy, remote transmitter is ofte......
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