Chapter 270

Pushbutton on/off controller with failsafe voltage monitoring

Victor Fleury


A pushbutton on/off controller with failsafe voltage monitoring is described.


Pushbutton on/off controller

voltage monitoring



Have you had the exasperating experience of a laptop or PDA defiantly not responding to your commands? You frantically press key after key, but to no avail. As hope turns to anger (but just before you throw the company’s laptop through the window) you slam your finger against the on/off power button. Ten seconds later, your laptop finally surrenders and the screen goes black in a high pitched whimper.

The unresponsive pushbutton was likely the result of an unresponsive μP or system ...

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