This circuit uses a 555 (according to the diagram) to generate 50 ms tone bursts at a frequency of 1.5 kHz. The circuit is from an 80's Electronic Design.
This circuit has very high input impedance and a differential input. The gain is 1,000 and the...
This circuit was found in a French magazine Toute LÉlectronique from 1978. Transistors are not...
Author: Newton C. Braga Published:Aug, 2016 Formato:Book and e-Book Pages:...