This circuit amplifies signals from 0.5 Hz to 300 kHz. We found it in an old documentation. Equivalent transistors may be used. The gain is 20 dB.
In the figure we have the way to connect an LED on the output of a power source to indicate the...
The UM3562 integrated circuit is a dedicated circuit found in many toys because it generates three types...
This amplifier for public address was found in English documentation from 1967. The transistors are from...