Mk125 When it gets dark it turns on and after 10 seconds it tuns off
it keeps clicking on and off every 10 seconds
You hear the relay clicking even with no lamp (so that is not the problem)
(when it is dark it stays on)
power from Velleman switching power supply PSSE1205 (12V, 500 mA, 6W)
when it turns on the relay cliks and then the voltage drops a bit but is still higher than 12 v
The voltage over the LDR drops from 1,7 to 1,3 V
The voltage at I2 of the LM 324 drops from 1,35 to 1,05 V
I measured between GND and pin 13: it is adjustable between 0 and the power supply voltage .
I measured between GND and pin 12: voltage varies only 0,3 volts between dark and light.
I ccheched R1, LDR, R6, D2, R5, R4, C3 all look ok
only the voltage over LDR is low (1, 7V) and varies only 0,4v from from 1,7 to 1,3 V
is the LDR not ok?