We found this circuit in a 1963 Radio Electronics. It can be used for remote control. The frequency depends on the coil and the power is supplied by a single battery.
) This circuit is from a 1967 RCA SCR manual. The circuit uses components from the era that can be...
Using an LDR as a sensor and an operational amplifier this circuit was found in the Encyclopedia of...
This increased voltage regulator is from a 1980 publication, but it can be mounted using a BD136...