We found this passive circuit in the February 1995 Electronics Now magazine. The circuit is passive, presenting only attenuation that must be compensated by an amplification stage.
The unijunction transistor for this circuit, found in a 1976 publication, may be 2N2646. The...
This sensitive circuit uses an LM324 operational amplifier that can be replaced by an equivalent. The...
This circuit is designed to trigger a xenon lamp from a switch. The circuit was found in the May...