Source for LASER (CB7843E)

This power supply for gas laser (HeNe) was found in a 90’s Popular Electronics. It generates from 1300 to 1500 V using common components.

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Scratch Filter (CB6655E)
We found this circuit in a Radio Electronics. The circuit can be seen elsewhere on this site. The...
Active low pass filter (CB20938E)
Found in old American documentation, this filter has a 8 dB per octave attenuation. The formulas for...
3 Volt Switched Regulator LM2577 (CB15410E)
The circuit presented is from the Linear Applications Handbook of the National Semiconductor of...