RE: ELEC2645 Project - Week 20

mcb1 — Mon, 14 Mar 2016 06:28:11 GMT

Jack

I fought variations for a couple of weeks, and tried various software fixes.

It turned out that power was the cause with the Neopixels generating some form of fluctuation that was enough to upset the readings.

My blog is here

Ultrasonic Reversing Monitor

Ultrasonic Reversing Monitor Part2

Despite having advised many posters in the past about the need to add large value capacitors across the supply, I fell into the same trap thinking that a neopixel doesn't draw much current.

After adding the capacitor, the readings were rock steady.

Mark

RE: ELEC2645 Project - Week 20

jw0752 — Mon, 14 Mar 2016 05:01:14 GMT

Hi Jack,

I like your project. I deleted a previous comment as I made the mistake of thinking your distance sensor was analog and when I learned other wise my advice for stabilizing the reading was no longer applicable.

John