Quick Start Siren (CB25765E)

We found this circuit in the October 1994 Electronics Now magazine. The CMOS IC is uncommon these days and the output is low power.

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3.5 MHz Loop Antenna (CB4758E)
This loop antenna was found in a 1990s documentation. The circuit includes a field strength meter. The...
Protected 1 A Power Supply (CB834E)
This power supply is protected from shorts in the load. The BD135 must be mounted on a heatsink...
Very Low Frequency Generator (CB4925E)
By the components used this circuit of old English documentation can still be easily assembled. The...