Audio and video switch (CB8512E)

This circuit was obtained from a 90s Radio Electronics. The integrated circuit used HAA11508 is not a common component today.

| Clique na imagem para ampliar |

Superheteredyne MW Receiver (CB962E)
This circuit, found in a 1958 magazine, is for reference only, since the components are not easy...
Darkness Monitor (CB21019E)
Found in Popular Electronics this circuit triggers an SCR and lights an LED when the location of...
International oscillator (CB9646E)
This OF-1 LO oscillator was found in a 1980s American documentation. The transistor can be any...