Solar timer (CB20498E)

This very low consumption circuit can be powered by a solar cell. The time indication is given by a microammeter.

Positive Voltage Regulator (CB5461E)
The integrated circuit used in this regulator is not very common today. The circuit is from old...
5 mA Constant Current Source (CB25615E)
This constant current circuit was found in the October 1993 Electronics Now magazine. The current can...
Complementary Output Operational Amplifier (CB19329E)
This operational amplifier circuit with power output using complementary transistors was found in a...