I had a few needs to for a simple voltage display that can handle the range of +5v to +12v. There’s a few different applications like displaying the state of a battery, a state of a power supply and so on. I was fairly interested to know how accurate these displays are considering they are only a few dollars each. I ordered these from Amazon.
I attached my Rigol DP832 bench power supply up it, set a particular value, then at the same attachment to the display attached my B&K DMM 2709B. The chart below shows the accuracy, which I find really amazing considering the low price.
|Value Set||Rigol DP832 Power Supply||B&K 2790B||Display||Diff from B&K||Diff from Value Set||Diff from value in percentage|