This wide-range radiation monitor was found in a 1980s documentation. The circuit uses a diode as a sensor and is quite critical requiring shielding shown in dashes to prevent snoring due to gain.
The circuit presented emulates an OR gate with the LM3900, operational transconductance amplifier....
This circuit was obtained from an English magazine from 1977. The magazine no longer exists, but...
This low power audio amplifier was found at 1992s Popular Electronics. Transistors are general...