Circuit Project Electronic

This circuit will remove the transient spikes and contact bounces from a non-latching push button switch.

Using a 555 timer as a monostable circuit, it is easy to build a good switch debouncer circuit. There are many circuits for SPDT debouncing, but not many for a normally open, push-to-make press button switch (PBS). The 555 monostable gives an output pulse of around 20 msec with component values shown. The formula for determining the output pulse is:

tout = 1.1 R1 C1

Read More Source: Andy Collinson
http://www.mitedu.freeserve.co.uk/Circuits/Switching/debounce.htm
Thank you.

This entry was posted on Thursday, April 17th, 2008 at 2:02 pm and is filed under 555, Digital. You can follow any responses to this entry through the RSS 2.0 feed.