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0-20V Bargraph Voltmeter
- Rajkumar Sharma
- 21.902 Views
- moderate
- Tested
- SKU: EL44541
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0 – 20V LED Voltmeter kit displays the voltage of the source using 20 LED’s. This projects 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
Schematic
Parts List
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PCB
Please, could you tell me what kind of LED’s did you use? Thanks!
These are common low power LEDs, normally rated at 2.1V and 20mA