20 LEDs 0 To 20V Bar-Graph Voltage Meter Using LM3914
0 – 20V LED Voltmeter project displays the voltage of the source using 20 LED’s. This project is based on the famous LM3914 IC from National Semiconductor.
Power Supply Input: 5 VDC Max @ 30 mA in DOT mode and 300 mA in BAR mode
Specifications
- Output: 20 LED’s
- Range selectable with onboard preset
- 2 Types of display Bar and Dot selectable by a jumper
- Berg connector for connecting power & voltage in
- Four mounting holes of 3.2 mm each
- PCB dimensions 40 mm x 145 mm