Optical tachometer (CB9349E)

We found this circuit in a 1970 publication by General Electric. The components can be changed according to the indicator.

| Clique na imagem para ampliar |

Transistor RIAA Preamplifier (CB1372E)
We found this circuit in documentation from the 1970s; The circuit uses Japanese transistors of...
Voltage Drop Alarm (CB1530E)
This circuit goes into operation producing a sound on a small speaker when the supply voltage...
TTL interface for CMOS (CB7036E)
Suggested by Harris in documentation from the 80s, this circuit uses components from that time. It...