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 ...

CNET’s expert staff reviews and rates dozens of new products and services each month, building on more than a quarter century of expertise. Editors' note, Dec 14: You can find all of our coverage ...

Here is the circuit diagram of a simple steam sensor, wired around a handful of inexpensive components. This steam sensor can be connected to a microcontroller’s I/O port directly. The steam sensor ...