Subwoofer Filter (CIR25262E)

This low-pass circuit was found in the December 1990 issue of Radio Electronics magazine. The circuit is part of a home theater sound system.

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Acoustic transmitter (CB8230E)
From a 90s Popular Electronics, this circuit emits pulsating signals for different types of...
35 to 5 V symmetrical converter (CB8176E)
Found in a Popular Electronics from the 90's, this circuit converts a 40 V symmetrical source to a 5...
Astable CA3030 (CB25140E)
This circuit generates frequencies determined by R3 and C1. We found it in the Radio Electronics magazine...