Now you can build your own simple door alarm security system using a tiny microcontroller chip PIC12F635! The circuit is nothing but an aural alert unit, which raises ...

Rep. Madeleine Dean's Banana Burn Against Commerce Secretary Howard Lutnick Goes Viral ...

The receiver is equally simple and also based ... the oscillator built around the 555 is enabled and starts to produce a warning tone. Finally, the test values indicated in the infrared barrier alarm ...