/challenges-projects/design-challenges/experimenting-with-current-sense-amplifier/b/challenge-blog/posts/blog-6-a-current-sensing-psu-upgrade-psu-logging-csa-fastlog-comparison-a-sound-check-an-overall-summaryWhile I had hoped to do more, unfortunately, because of time constraints arising from work commitments and the fact that the challenge is due to end, this will be the final blog in the series. It wouldn&rsquo;t be a complete challenge if I didn&amp;rsquo...en-USTelligent Community 12https://community.element14.com/challenges-projects/design-challenges/experimenting-with-current-sense-amplifier/b/challenge-blog/posts/blog-6-a-current-sensing-psu-upgrade-psu-logging-csa-fastlog-comparison-a-sound-check-an-overall-summaryThu, 09 Jun 2022 03:29:02 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:d9b90c78-3537-468c-aa7b-e29a45360f55aspork421<p>Nice write up - that was a pretty clever way to test by capturing audio [emoticon:c4563cd7d5574777a71c318021cbbcc8]</p><img src="https://community.element14.com/aggbug?PostID=23684&AppID=364&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/challenges-projects/design-challenges/experimenting-with-current-sense-amplifier/b/challenge-blog/posts/blog-6-a-current-sensing-psu-upgrade-psu-logging-csa-fastlog-comparison-a-sound-check-an-overall-summaryThu, 02 Jun 2022 12:04:31 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:d9b90c78-3537-468c-aa7b-e29a45360f55misaz1<p>I tried using sensor at higher speed than 400 kHz but at 1 MHz I started receiving bit and CRC errors frequently, so I have done all my experiments at 100 kHz or 400 kHz speeds. I do not have oscilloscope so I cant investigate how does the level shifter affect signal integrity, but I think 3.4 MHz are possible only with direct connection. Second issue is that it is very hard to find I2C driver supporting this speed. I checked datasheets of all my MCUs and all supports max speed of 1 MHz. I considering trying some overclocking of MCU which do officialy do not support this, but when I have seen many errors at 1 MHz, I decided to spend time with something less complicated and more usefull. I have prepared support for changing speed in my C library but it requires platform specific implementation and lot of testing, so I have not commited it publicly yet.</p><img src="https://community.element14.com/aggbug?PostID=23684&AppID=364&AppType=Weblog&ContentType=0" width="1" height="1">