/products/roadtest/b/blog/posts/road-testing-the-pan1780-evaluation-kit-part-5---air-quality-dashboard-via-web-bluetoothIntroduction Parts and Software Web Browser and Javascript Libraries Particulate Matter Sensor Temperature, Humidity, TVOC, and eCO2 Sensors Display PAN1780 Firmware Build Sourcing Power from the Board&#39;s Rails Shielden-USTelligent Community 12https://community.element14.com/products/roadtest/b/blog/posts/road-testing-the-pan1780-evaluation-kit-part-5---air-quality-dashboard-via-web-bluetoothFri, 20 Nov 2020 11:34:14 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:3c3fe24a-12b5-4618-b330-486acc3f1988jeff_electron1<p>I&#39;m in awe of what you&#39;ve achieved here, and I cannot wrap my head around programming an embedded device with java script! excellent work.</p><p>&nbsp;</p><p>the only contribution I can make is that there are 2 3v3 regulators on the board. the one you&#39;ve highlighted looks to only provide the power for the USB hub, but there&#39;s another on on the J-link page which provides the rest of the schematic (sometimes through link jumpers)</p><p>this one is <a class="jive-link-external-small" href="https://www.st.com/resource/en/datasheet/ld39100.pdf" rel="nofollow ugc noopener" target="_blank" title="https://www.st.com/resource/en/datasheet/ld39100.pdf">https://www.st.com/resource/en/datasheet/ld39100.pdf</a> i think.</p><p>&nbsp;</p><p>its output is significantly higher (1A vs 150mA for the LD3985), but of course it has to power more on-board stuff.</p><p>&nbsp;</p><p>completely agree with you about text searchability - its made worse that the second regulator (IC1) part number is slightly obscured by C3, so the last character is unreadable. </p><img src="https://community.element14.com/aggbug?PostID=10234&AppID=14&AppType=Weblog&ContentType=0" width="1" height="1">