Found these two LED voltmeters on eBay for less than £5 including postage. They measure from 0v to 3.3v. Bought two so that I could see whether they were calibrated exactly the same - inevitably they weren't. The difference is small, but not consistent across the entire range of measurement. They are also affected by changes in temperature - perhaps not surprisingly.
By Julian
Youtuber, shed dweller, solar charge controller aficionado
Please give an ebay link, aliexpress link or a model. I am interested in getting one myself
Accuracy has nothing to do with how many digits are on the display. What you're referring to is resolution. Resolution has absolutely nothing to do with accuracy.
Can you please give the link to ebay? I didn't find it in the video.
Not very scientific to be frank. No stated accuracy of the meters and no independent measurement via a known source such as a wien bridge or quality DVM.
Astonishingly accurate – I was really impressed, particularly at that price.
Interesting. Going by your recent video. The Chinese got a little more accurate.
Comparing Two Cheap LED voltmeters with 3 Decimal Places Accuracy