Countdown Timer Kit w/Relay Output – CK1611
Countdown Timer Kit w/Relay Output. Countdown Timer kits are an ever popular item with the hobbyist. One of the main methods used is the ever-popular 555 timer IC. In this countdown timer circuit we use a 555, a counter IC and a transistor switch to activate a relay either on-to-off or off-to-on (mode selected by a jumper) as soon as the counting period is over. The circuit consists of 3 parts: an oscillator, a ripple counter and two switching transistors. DIY K152.
- L: 2″ W: 2-1/4″ H: 5/8″
- Requires external 12 volt dc power supply
- Jumper Selectable count down times ( 8 to 8192 seconds)
- Relay has Normally Open and Normally Closed Contacts rated for voltages 28VDC @ 10A, 125VAC @ 10A, or 240VAC @ 7A.