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.
This circuit turns on and off from pulses applied to the CLK input. The output 0 goes to the “’1"...
Using the 555 this circuit was found in a Popular Electronics from the 90's. The circuit directly...
We found this circuit in a 1982 documentation. Its outputs must be applied to the input of an...