This circuit produces a pulse when the voltage in the regulator exceeds a certain value depending on the components. PUT is not a common component today. The circuit is from a 1970 EEE.
Wired to the output of any amplifier this circuit makes an incandescent lamp flash according the...
Great sensitivity for the circuit can be obtained with a Darlington amplification step for the...
This Philips circuit of the 70's makes use of components of the time. The DZD40 is an uncommon...