Blown fuse alarm (CB8967E)

We found this circuit in a 1980s documentation. The circuit uses general purpose transistors, triggering an LED indicator.

| Clique na imagem para ampliar |

Timer for Showcases and Signs (CB16791E)
We found this circuit in a 1994 documentation. The circuit enables timing at dusk by keeping the...
Regenerative superheterodyne (CB23730E)
This interesting circuit of a one-transistor receiver was found ina march 1961 Radio Electronics...
1 minute linear ramp generator (CB8924E)
Found in a 1969 Ferranti documentation, this circuit uses only bipolar transistors from that time....