ANTI-THEFT SECURITY FOR CAR AUDIOS

This small circuit, based on popular CMOS NAND chip CD4093, can be effectively used for protecting
your expensive car audio system against theft.

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Add on stereo channel selector

The add-on circuit presented here is useful for stereo systems. This circuit has provision for connecting stereo outputs from four different sources/channels as inputs and only one of them is selected/ connected to the output at any one time.

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CIRCUIT || Stereo Headphone Amplifier

Here’s a top-class headphone amplifier that can drive high or low-impedance phones to full power levels, with very low noise and distortion. For best performance, it can be teamed with the Stereo Preamplifier described last month. Alternatively, it can be used as a standalone unit, requiring only a power supply and a volume control potentiometer for use with any line-level signal source (CD/MP3 player). It even includes dual outputs, so you can listen with a friend!

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