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.

Phototransistor triggering a Reed Relay (CB11213E)
The circuit we showed was obtained from our publication on relays and makes use of any...
Wideband 4046 VCO (CB25247E)
This VCO with the 4046 PLL generates signals from 0 to 1.5 kHz. The circuit is from a Radio...
Tone control (CB15548E)
The base of this circuit is 1/4 of an integrated circuit 4136 which consists of a quadruple 741....