Timer Circuits Relay Switches

Timer Circuits Relay Switches

A series of 3 kits each with a unique approach to timing a relay. 1st. uses a 555 as a stable oscilator & 14 stage ripple counter & a Pot to set osc. frequency. Select outputs of 8,16,32,64,128, 256,512,1024, 4096, or 8192 counts. When count is reached SPDT relay is energized. Contacts remain closed until power is removed. 2nd. kit uses 555 as a monostable timer & pot to set time. Header socket allows you to change the timing cap. Relay is energized as soon as "Start" switch is pressed & remain closed until time-out or "Reset" is pressed. 3rd. kit is a timer based on R/C discharge to control a relay. Pot & Cap set the time. Relay is energized when "Start" switch is pressed &remain closed until time-out. LED shows relay status.Relaycontacts rated 12V 10A. Kits are 12VDC powered.


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