Subsonic Filter (CB25143E)

We found this circuit in the June 1988 Radio Electronics magazine. The power supply must be symmetrical.

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Antenna Splitter (CB24740E)
This circuit was found in the April 1983 issue of Radio Electronics magazine. Its purpose is to...
Automotive Ignition Blocker by Cell (CB17635E)
Evidently, this is a project that still needs some improvements. For example, the ignition can be...
1.2 V voltage regulator (CB19515E)
This very low voltage regulator for 3 V input (2 batteries) was obtained in a documentation from...