Experimenting with a Raspberry Pi GPIO Pin/products/raspberry-pi/b/blog/posts/experimenting-with-a-raspberry-pi-gpio-pinIt&#39;s Pi Day [well, almost: news travels slowly where I am] and I thought I&#39;d add a simple electronic experiment to all the other good stuff that people are doing. Not all experimenting has to be complicated or requires the use of lots of...en-USTelligent Community 12RE: Experimenting with a Raspberry Pi GPIO Pinhttps://community.element14.com/products/raspberry-pi/b/blog/posts/experimenting-with-a-raspberry-pi-gpio-pinMon, 16 Mar 2020 02:09:48 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:ff5364c6-7110-4a61-aab1-bcfe7e670771dougw1<p>I&#39;m impressed that it could source and sink 20 mA. That is good to know.</p><img src="https://community.element14.com/aggbug?PostID=8867&AppID=86&AppType=Weblog&ContentType=0" width="1" height="1">RE: Experimenting with a Raspberry Pi GPIO Pinhttps://community.element14.com/products/raspberry-pi/b/blog/posts/experimenting-with-a-raspberry-pi-gpio-pinSun, 15 Mar 2020 21:07:28 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:ff5364c6-7110-4a61-aab1-bcfe7e670771genebren1<p>Nice test.&nbsp; When in doubt, measure it!</p><img src="https://community.element14.com/aggbug?PostID=8867&AppID=86&AppType=Weblog&ContentType=0" width="1" height="1">RE: Experimenting with a Raspberry Pi GPIO Pinhttps://community.element14.com/products/raspberry-pi/b/blog/posts/experimenting-with-a-raspberry-pi-gpio-pinSun, 15 Mar 2020 18:11:52 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:ff5364c6-7110-4a61-aab1-bcfe7e670771DAB0<p>Good test.</p><p>&nbsp;</p><p>When I ran some tests on the RPi output I found they tend to float, so sometimes you do not get clean transitions unless you use external termination resistors.</p><p>&nbsp;</p><p>DAB</p><img src="https://community.element14.com/aggbug?PostID=8867&AppID=86&AppType=Weblog&ContentType=0" width="1" height="1">RE: Experimenting with a Raspberry Pi GPIO Pinhttps://community.element14.com/products/raspberry-pi/b/blog/posts/experimenting-with-a-raspberry-pi-gpio-pinSun, 15 Mar 2020 17:54:04 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:ff5364c6-7110-4a61-aab1-bcfe7e670771clem571<p>Good test. What some forget, that the led provides small resistance as well hence your graph. </p><img src="https://community.element14.com/aggbug?PostID=8867&AppID=86&AppType=Weblog&ContentType=0" width="1" height="1">