This General Electric circuit produces pulses of light only when light stops shining on the sensor. Equivalent SCRs can be used and the trigger adjustment is done in a trimpot. The maximum load is 40W.
Found in a 1970 EEE, this circuit can be applied to TTL ports. The supply is 5 V and the...
This circuit is from a 90s Popular Electronics. The integrated circuit is from that time. The...
This automation control circuit uses two relays to control 4 loads using just one switch. The...