Tone Oscillator (CB22066E)

Found in old documentation, this oscillator with the LM380 produces an audio tone in a speaker. Frequency is set in VR1.

5 V x 5A Regulator (CB15033E)
This circuit was found in an old French documentation, but it is current if we use the BC547 for...
NCP1602 Power Factor Controller (COM048E)
August 2016 - It can be obtained from Mouser Electronics the power factor controller NCP1602 from...
5 and 6 V x 25 mA and 100 mA power supply (CB19246E)
This source of two voltages and two currents was found in documentation translated from Argentina. We...