OngoingP002E: LM3914 Battery Level Meter
STDP002E: LM3914 Battery Level Meter
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License
：GPL 3.0
Creation time:2020-09-13 18:25:29Update time:2020-12-07 08:24:35
Description
A Quad LM3914N Adjustable Li-Ion Battery Level Meter. Note the LED segment is not your usual type, it was reversed so you cannot use normal LED segments without redesigning. Link in BOM for LED segments I used.
Video of project:
https://youtu.be/u_-uY8or-Cc
Blog:
https://ratti3.blogspot.co.uk
Gerber files and BOM list:
https://github.com/Ratti3/LM3914N-Li-Ion-Battery-Meter
Design Drawing
schematic diagram
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LM3914N Battery Level MeterOpen in Editor
PCB
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LM3914N Battery Level MeterOpen in Editor
BOM
| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | 3k | R1_4,R1_1,R1_2,R1_3 | R0805 | 4 |
| 2 | 10u | C1,C2,C4,C3 | CAP-D5.0×F2.0 | 4 |
| 3 | 5K | VR1_1,VR1_4,VR1_2,VR1_3 | RES-ADJ-TH_3296X | 4 |
| 4 | SW_PUSH_DPDT | BATT1-2,BATT3-4 | SW_PUSH_BUTTON_MINI | 2 |
| 5 | 10-segment led bar display | BATTERY3,BATTERY1,BATTERY4,BATTERY2 | DIP20 | 4 |
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