This circuit is the factory version of the LM386 low-power amplifier. The sound quality is excellent, and the power can be supplied with voltages from 6 to 16 V.
We found this Vox in a 1969 Motorola documentation. Transistors support modern equivalents and the SCR can...
This circuit isolates na áudio signal or digital signal up to 100 kHz, applying it to a gain 10...
We found this transmitter in a documentation on espionage from the 90s. The circuit is...