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The author wanted a very cheap and simple alarm for some of his possessions, such as his electrically assisted bicycle. This alarm is... -
Using a mobile phone while driving is dangerous. It is also against the law. However, you can use your mobile phone as a powerful music p... -
Here is a simple circuit for monitoring the fuel level in vehicles. It gives an audiovisual indication when the fuel level drops alarmi... -
This circuit alternately flashes 2 white LEDs, on a 3v supply and produces a really bright flash. The circuit produces a voltage above... -
The use of transmitters which have a more powerful output than the ‘flea-power’ are sometimes required when there are many obstacles i...
