This 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,
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|Kit Form||Short Form (circuit only)|
|Kit Group||Short Circuit Series|
|Contains High Voltage Components|
|Application Field||Countdown Timer|
|Additional required items||9V battery|
|Volume Number||Volume 2|