Auto on-off delay circuit .more than 10 hours delay.

Power delay timer with three relays. OFF delay time and ON delay time are changeable by changing values of capacitors or resistors. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Off delay time determined by the capacitor in the right hand side that which its capacity now is 5uf . You can change it like this : CAPACITY FREQUENCY DELAY 5uf :: 80mHZ = 12.5sec 10uf :: 40mHZ = 25sec 20uf :: 20mHZ = 50sec 40uf :: 10mHZ = 100sec 80uf :: 5mHZ = 200sec 160uf :: 2.5mHZ = 400sec 320uf :: 1.25mHZ = 800sec 640uf :: ~ 0.62mHZ = 1600sec 1280uf :: ~ 0.31mHZ = 3200sec 2560uf :: ~ 0.16mHZ = 6400sec 5120uf :: ~ 0.08mHZ = 12800sec 10240uf :: ~ 0.04mHZ = 25600sec . . . ... etc ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ON delay time determined by the left hand side capacitor that which its capacity now is 4mf = 4000uf. I have build this circuit to turn on a motor for 20 seconds every 6 hours

published 8 years ago