Our second version of the alarm project is now in beta! All we have to do now is update our design in circuit simulator, do a tiny bit of debugging and move it all over to perforated board. Over the next few weeks, there will be a series of posts describing how each module of the alarm circuit works. This design consists of 5 J-K Flip-Flops, 8 AND gates, 2 OR gates, 4 NOT gates, 1 NPN transistor, 3 555 timers, a darlington driver, a 5v relay, a 5v voltage regulator, 12 diodes, 7 LEDs, a magnet switch, a speaker, a piezo buzzer, a numeric keypad, various resistors and capacitors and lots of single core wire and time.

Alarm 2.0 Beta