We found this circuit in the October 1996 Electronics Now magazine. The circuit uses LDRs as sensors and drives relays. The relays must have voltages according to the power supply.
Short square pulses trigger this damped oscillator. The frequency of the damped oscillations is...
Based on common components, this circuit was found in an English publication. The circuit is...
This circuit is from a 1977 publication for radio amateurs presenting a crowbar protection. The...