More about Alarm (134)

3-04-2014 | My neighbor from across the street is close to 90 years old and he is partly disabled. He still lives alone, but every day someone drops by...

10-03-2014 | This project achieves a measuring instrument with the following functions:

1-07-2013 | This little project was inspired by a tilt sensor circuit which first appeared in our 2010 Special Projects Edition. The idea was to build a...

1-03-2013 | In this second and final part of the article we discuss the operation of the circuitry, and the building of the clock.

1-01-2013 | Although the main objective of the 7-uP project was to create a digital alarm-clock with enhanced functionality, a key feature is the abilit...

1-09-2012 | The principle is a very simple one: once the bike has been set on its stand, three carefully-positioned mercury switches give position infor...

1-08-2012 | There are a number of systems around used to locate lost R/C models. I considered that I could build a system that was a little bit better.

1-08-2012 | There are a number of systems around used to locate lost R/C models. I considered that I could build a system that was a little bit better.

1-07-2012 | Smoke alarms are extremely useful devices, but they suffer from one significant disadvantage, which is that they’re battery powered. This ci...

1-07-2010 | For car alarms, emphasis should be put on hearing the audible alert and identifying it as belonging to your ‘wheels’. Unfortunately, modern...