Solar power source (CB20481E)

In the figure we have a solar power source for experiments with this type of energy. The cells must be of the same type.

Pulses for data systems (CB8867E)
This circuit was found in a 1966’s American publication. What it does is to receive a pulse and...
Simple ohmmeter (CB4152E)
The idea of this circuit is a resistance meter or continuity test with a common microammeter or...
Capacitance multiplier (CB20746E)
Modern operations can be used in this circuit that multiplies a capacitance of 10,000 uF for a...