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Audio - all subcategories
High-quality modular design. 9V Battery powered - Very low current drawing. Preamp, tone control, mixer - all in one
author: RED Free Circuit Designs visits: 433
This nifty sound level meter is a perfect one chip replacement for the standard analog meters. It is completely solid state and will never wear out. The whole circuit is based on the LM3915 audio level IC and uses only a few external components.
author: visits: 401
Simple add-on module. Switchable "Control-flat" option.
author: RED Free Circuit Designs visits: 397
Useful to listen in faint sounds. 1.5V Battery operation. Amplifies only faint and weak sounds!
author: RED Free Circuit Designs visits: 388
22w audio amplifier built of TDA1554 and some passive components. Can be used in car audio systems.
author: visits: 364
This 3 channel 15 LED spectrum analyzer is the perfect addition to any audio amp project. It produces fantastic displays on three LED bars that can be individually adjusted for any particular frequency range.
author: visits: 348
Timer circuit that turns-off your amplifier when idle for 15 minutes. Fed by amplifier tape-output.
author: RED Free Circuit Designs visits: 345
Simple circuitry suitable for moving-magnet cartridges. Passive high-frequency equalization
author: RED Free Circuit Designs visits: 344
This is a very simple, low cost, Hi-Fi quality power amplifier. You can build it 5 ways, like it’s shown in the table (from 20 W to 80 W RMS).
author: Jacint Chapo visits: 340 |
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