/challenges-projects/design-challenges/pi-iot/b/blog/posts/pi-iot-alarm-clock-11-clock-displayEnabling I2C Connecting Hardware 3.3V vs 5V ? Python Library 7-Segment Display 8x8 LED Matrix Demo This post will be about the display of the actual alarm clock. It will consist of two components, visualising different informationen-USTelligent Community 12https://community.element14.com/challenges-projects/design-challenges/pi-iot/b/blog/posts/pi-iot-alarm-clock-11-clock-displaySat, 30 Jul 2016 18:15:59 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:7e252006-c27a-431d-8a09-4e66f86fe01abalearicdynamics0<p>Great post. It includes a good quick-start guide to manage I2C.</p><p>&nbsp;</p><p>Thank you!</p><p>&nbsp;</p><p>Enrico</p><img src="https://community.element14.com/aggbug?PostID=1754&AppID=138&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/challenges-projects/design-challenges/pi-iot/b/blog/posts/pi-iot-alarm-clock-11-clock-displaySat, 30 Jul 2016 18:12:39 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:7e252006-c27a-431d-8a09-4e66f86fe01aDAB0<p>Very nice detailed post.</p><p>&nbsp;</p><p>DAB</p><img src="https://community.element14.com/aggbug?PostID=1754&AppID=138&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/challenges-projects/design-challenges/pi-iot/b/blog/posts/pi-iot-alarm-clock-11-clock-displaySat, 30 Jul 2016 00:01:15 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:7e252006-c27a-431d-8a09-4e66f86fe01amcb11<blockquote class="jive-quote"><p>power the displays using 5V instead of 3.3V and not damage my Pi&#39;s I2C pins</p></blockquote><p>I had the same issue with a wireless receiver using the 3v3 RFM69 devices and an I2C LCD display.</p><p>Luckily the I2C is pulled up on the sender end, hence it remained at 3v3 ...</p><p>&nbsp;</p><p>Very useful post.</p><p>Cheers</p><img src="https://community.element14.com/aggbug?PostID=1754&AppID=138&AppType=Weblog&ContentType=0" width="1" height="1">