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.

Motor Starting Circuit (CB13803E)
We found this circuit in Motorola's Circuit Applications for the Triac 1971 manual. The circuit is for ½...
Current pulses (CB8936E)
Found in an American publication from 1968, this circuit generates pulses at a rate of 2,500 per...
High Q Notch Filter (CB14424E)
The filter presented is from 1994 but can be implemented with a more modern equivalent. We found...