single digit voltmeter by IC 4028, 4029 LM311
Thursday, August 21st, 2008
First bear it in mind that it is a single digit voltmeter which is 0-9 counts only on the positive side, that is it can measure +0 to +9V DC +/- 1V error. That may not be practical for the cost of the components above. It may be used as a toy logic probe. The [...]
