Anchor locator (CB7884E)

This 600 kHz circuit is designed to locate a lost boat anchor. The circuit has a range of up to 10 meters. The transistor admits equivalent.

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Low noise preamplifier (CB21936E)
This circuit with the TDA3410 was found in the SGS manual from 1982. The circuit was used in car...
Voltage doublers (CB24952E)
In the figure we have two simple configurations of voltage doublers. Resistors and diodes are...
Neural Comparator (CB4831E)
This circuit, found in a 2000 documentation, is used in simple artificial intelligence and robotic...