Short Circuits Two Project - Countdown Timer
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Assembly Required
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 |
| Difficulty | Simple |
| Application Field | Countdown Timer |
| Contains High Voltage Components | No |
| Device | Timer |
| Instructions Included | No |
| PCB Width | 47mm |
| PCB Length | 61mm |
| Additional required items | 9V battery |
| Project Number(s) | 2 |
| Volume Number | Volume 2 |