Digital volume control DD1 К555ИЕ7

The Digital volume control circuit has been designed to work with external wired remote has 16 levels of volume-driven volume up button and reset button. DD1 - counter displays 16-bit binary code to control the T shaped voltage divider. DD2 is used as a clock. DD3 inverts the signal from the counter. The regulatory element is made on resistors R6/R7, R8/R9 and transistor switches that are connected certain resistance to ground formed a T shaped voltage divider.

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Simple Audio Digital Volume Control

This Simple Audio Digital Volume Control scheme for all its simplicity allows you to adjust the volume with two buttons! Chip - DS1669 0.1 uF capacitor.

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Digital volume control MAX5440

Digital volume control MAX5440 makes this circuit does not require any special programming knowledge to work, because it works on the principle of "plug and play".

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USB sound card based PCM2702

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Make a USB sound card is easy if you use a chip from the PCM2702 IC BURR BROWN / Texas Instruments in it, you can create a fully functional USB sound card. Sound Card gets power from the USB port and has one stereo output. You do not need to install any drivers for Windows XP and Vista, because they are already inside. It remains only to connect and listen.

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Audio detector

This scheme for the reception of audio signals with an adjustable noise compensator. It can be used to generate a weak radio signal, for example, PDA (Pocket PC)

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