This circuit uses an impact sensor transistor called Pitran rare today. The circuit is from 1969 American documentation.
March 2017 - Mouser Electronics announces its new TPSA89 voltage regulator from Texas Instruments with...
This Harris circuit from the 90's is intended for recording old EPROM memories. The circuit uses...
We found this circuit in an old Radio Electronics. The transistors can be the BC548. The circuit...