In the figure we have a simple thermometer with NTC, using an analog current indicator. The adjustment is made in the trimpot and the power is done by batteries.
This circuit is suggested by National Semiconductor in its Linear Applications Handbook. It makes...
This headphone amplifier was found in a 1966 documentation. The transistor is made of germanium and the...
This audio oscillator is from a 1957 Raytheon publication. The tone generated depends on C2 and C2...