Circuit Project Electronic

There are times when a little light inside the car would greatly assist one of the passengers but the
dome light is too bright for safe driving. The dimmer circuit in fig. 1 may be added to an existing
dome light or included with a new passenger spot lamp.
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another very simple audio preamp to build. all parts should be available at your very local electronics shop
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Two Microphone Preamplifier by BC109
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Source: http://www.reconnsworld.com/audio_singleicpreamp.html

Here is the schematic diagram of my regulator. You may want to print it out, and then go on reading. This regulator is designed for 12V systems employing panels of up to 7A total current, and loads of not over 20A. It can be easily modified for greater currents.
U1A compares an adjustable sample of the [...]