/members-area/personalblogs/b/blog/posts/air-quality-mini-station-2---system-overviewI gave this project a bit of thought. I want it to be portable and to have swappable ubiquitous power source. That is why it will be supplied from a power bank (micro USB). Most of the electronic parts that I want to use operate at 3.3V, so LDO (5V -en-USTelligent Community 12https://community.element14.com/members-area/personalblogs/b/blog/posts/air-quality-mini-station-2---system-overviewMon, 10 Apr 2017 15:31:58 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:b08caf2c-30ec-4b93-86df-4a2c14ca10a3DAB0<p>Good idea.</p><p>&nbsp;</p><p>Sometimes a line controlled power supply can introduce unwanted EM noise on the circuits.</p><p>&nbsp;</p><p>Going to a battery pack adds a little complication on monitoring charge, but it provides you with a clean power rail and should help you identify external EM issues easier.</p><p>&nbsp;</p><p>DAB</p><img src="https://community.element14.com/aggbug?PostID=2852&AppID=293&AppType=Weblog&ContentType=0" width="1" height="1">