Laptop Power Supply (CB8171E)

This circuit was obtained in a 90s 73 magazine for radio amateurs. The power transistor must have a heat sink. The input voltage is 13.6 V.

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Continuity tester (CB9326E)
This circuit was obtained in an Electronics Now from the 90s. The circuit uses operational...
Touch switch (CB9562E)
This sensitive touch key appears on this website from other sources. This version was taken from a...
Oscillator with the 567 (CB5921E)
In the figure we have the way to implement an adjustable active cycle oscillator using PLL 567....