Hughes suggests this circuit in a 1968 documentation. The circuit uses old transistors that can be replaced with equivalents. MOSFET is the critical component of the circuit.
The FET of this circuit of a 1971 publication may be the BF245. The circuit serves as a voltage...
July 2017 - Texas Instruments' new bidirectional current controllers LM5170-Q1 for power...
When a small air current reaches the piezoelectric sensor, a small audio signal is generated and...