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Soft and Silent Keys
and 13mm lens with 28° angle of view
Surf the internet and check emails on the longer-range 2
1x RS232/422/485)
Short Circuits Two Project - Countdown Timer Surge Protection Soft and Silent KeysThis neat project enables you to dial a time you want to elapse before you want something to happen, say the exposure of a camera shutter or an electrically operated door to stay open. At the end of the timed period (seconds to many minutes) a relay is energized which can switch something on or off. PCB and all parts supplied, including relay. Requires 9V battery. Instructions sold separately or withing the Short Circuits book range, Short Circuits
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