This simple Morse Code oscillator was found in a 1980s American documentation. The power supply should be powered with 5V and the integrated can be the 7400.
We found this version of the automotive tachometer in a 1980s publication. Variations from other...
This simple circuit uses a 200 µA galvanometer to measure voltages in three ranges. The circuit...
The purpose of this circuit is to amplify the signal of a phone pickup and to be able to reproduce the...