http://forums.leaflabs.com/topic.php?id=649 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:07:12 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=649#post-3607 Fri, 11 Feb 2011 11:56:50 +0000 poslathian 3607@http://forums.leaflabs.com/ <p>When you hit a button, usually it switches back and forth a bunch of times as the two metal plates vibrate against one another. At 72MHz, youll need to watch out for this, for example:</p> <p>int count = 0;<br /> void loop() {<br /> while(!digitalRead(BOARD_BUT_PIN)); // wait for press<br /> // delay(1) // uncomment this line for simple solution<br /> while(digitalRead(BOARD_BUT_PIN)); // wait for button up<br /> count++;<br /> }</p> <p>this could easily result in a count of more than 1 despite only pressing and releasing the button once. A simple solution is to add a delay. But you can be more clever than that!</p> <p>here is an article on the subject<br /> <a href="http://www.eetimes.com/discussion/break-point/4024944/The-secret-life-of-switches" rel="nofollow">http://www.eetimes.com/discussion/break-point/4024944/The-secret-life-of-switches</a> </p>