Suggested for the control of photographic enlargers, this 1967 General Electric circuit uses still common components. The circuit directly controls a lamp for exposing negatives.
What sets this transmitter apart, which we found in a 1990 documentation, is the modulation by the...
This General Electric circuit is from the 80's. The PUTs used in this meter are not common...
This game was found in Radio Electronics from the 90s. The components used are common except some...