| An audio drive indicator, especially with a Hi-Fi installation, can be a very handy instrument to check whether there is any overload pres...
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| A friend asked me, how he could make a Drum Light for the coming carnival, which would light up, everytime he slams the drum and therefore g...
| A friend asked me, how he could make a Drum Light for the coming carnival, which would light up, everytime he slams the drum and therefore g...
| This simple compressor circuit controls the dynamics of a speech signal so that loud sounds are controlled to produce a more intelligible...
| This distinctive variation of a Christmas tree is made from a thin printed circuit board, which is cut in the shape of a spiral. This is...
| With the help of a quad opamp, a bi-color LED and a few passive components you can quickly build a simple signal level meter which has thr...
| For a change, this simple touch-sensitive switch does not operate by detecting the resistance of the skin between two points or measuring...
| Hell! I moved my control stick left and my model veers off right! And down is up! Here’s a simple solution to the problem.
| Circuits that automatically turn off battery powered equipment after a set period are commonplace. To promote good battery life it’s imp...
| This simple circuit detects noise in a room and activates a beeper if the noise exceeds an adjustable threshold level.