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.
| category_l3 | Educational |
| category_map_id | 1267 |
| price_exc | 17.5 |
| lead_note | Unavailable |
| source_updated_at_snapshot | 2026-10-19T00:00:06.630690 |
