This circuit was found in documentation two years 80. Transistors can be modern equivalents. Or circuit can be modified to operate with lower voltage.
The sensors in this circuit, found in a 1999 documentation, are stripped wire tips at different levels...
This traditional crystal oscillator configuration can use any CMOS gate configured as an inverter. R1...
This amplification stage circuit with a germanium transistor was found in a 1980s documentation. The...