This unijunction programmable transistor circuit was found in the December 1968 issue of Radio Electronics magazine. The circuit is a half-wave control for incandescent lamps only.
The circuit shown uses a FET as a stabilizer, as this type of circuit usually uses lamps in this...
This circuit lights up an LED when the temperature exceeds a certain pre-set value and lights up...
This configuration, quite common and found in other sites, is from European documentation from the...