This circuit was obtained from an 80's Radio Electronics. The circuit decodes “scrambled” or sinusoidal encoded signals by providing an audio signal at the output.
The integrated circuit used in this charger is not very common today. The circuit is from...
This 800 Hz sinusoidal oscillator was found in a 1970s American documentation. The transistor...
This circuit was suggested by Popular Elecronics from the 90's. The circuit has high input...