Solar Voltage Doubler (CB20482E)

This circuit is intended for carrying out experiments with solar cells. The circuit is from a 1991 documentation.

Band pass active filter 1 kHz (CB5196E)
The operational amplifier using this 80's circuit is a double 741 of the time. The circuit may be...
Simple TTL Power Supply (CB1161E)
We found this circuit in an English publication of 1976. It can be easily assembled by changing the...
Logarithmic generator (CB7593E)
This circuit has a 100 dB dynamic We found it in a Popular Electronics from the 90s. Equivalent...