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.
The coil consists of 100 turns of wire 28 in a wooden or PVC tube from 2 cm to 2.5 cm in diameter with...
This circuit is based on the Texas Instruments LMC662 and has the function of monitoring the audio...
This circuit, which uses only common transistors, was obtained from a 1988 publication, but can be...