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.

• Short Circuits Two Countdown Timer Project Kit Project number 2 in SC2 series Short form kit with components and board Instructions not included
• PCB & all parts supplied
• Requires 9V battery