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.
Wired to the output of any amplifier this circuit makes an incandescent lamp flash according the...
Great sensitivity for the circuit can be obtained with a Darlington amplification step for the...
This Philips circuit of the 70's makes use of components of the time. The DZD40 is an uncommon...