Current to voltage converter for grounded loads (CB9338E)

Found in an Electronic Design from the 90s, this circuit uses components from that time.

Dip Meter with Germanium Transistor (CB5174E)
This circuit was found in an American 80's documentation. The transistor is of germanium of the...
The New Generation of Microwave Ovens (ART333bE)
If there is an indispensable household appliance in our kitchen these days it is the microwave...
Light Sensitive CMOS Astable 4011 (CB907E)
This circuit uses a photoransistor to control the frequency for this oscillator. Power supply...