Ripple Filter (CB6724E)

This circuit was found in a Delco 1965 publication. Transistors may be current equivalents according to the desired output voltage and current.

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Adjustable Square Wave Generator (CB13638E)
We found this circuit in a publication for radio amateurs in 1974. The bipolar transistors can be...
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Found in a 1980s American documentation, this circuit has a current consumption of only 1 mA. The...
0 to 30 V power supply with 1A (CB21853E)
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