Short Circuits Two Project - Countdown Timer Surge Protection 1x RS232/422/485)

1x RS232/422/485)

- Warranty: Textiles & Mesh – 5 years of single shift use

NOTE: This unit only measures over the range 50-90dBuV

Indoor 10/100 Base-T Shielded CAT5 High Power Lightning Surge Protector

Short Circuits Two Project - Countdown Timer Surge Protection 1x RS232/422/485)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, Short Circuits