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LM3914 Battery Level Meter
1 year agoProfile：LM3914 Li-Ion Battery Level Meter
Open source license: GPL 3.0
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
BOM
| ID | Name | Designator | Footprint | Quantity | BOM_Supplier | BOM_Supplier Part |
|---|---|---|---|---|---|---|
| 1 | SW_PUSH_DPDT | BATT1-2,BATT3-4 | SW_PUSH_BUTTON_MINI | 2 | LCSC | C318861 |
| 2 | PH-2AK | BATT1,BATT2,BATT3,BATT4 | CONN-TH_PH-2A | 4 | LCSC | C8886 |
| 3 | 10-segment led bar display | BATTERY1,BATTERY2,BATTERY3,BATTERY4 | DIP20 | 4 | AliExpress | https://www.aliexpress.com/item/32877938733.html |
| 4 | 10u | C1,C2,C3,C4 | CAP-D5.0×F2.0 | 4 | Mouser | 647-UMW1E100MDD |
| 5 | 3k | R1_1,R1_2,R1_3,R1_4 | R0805 | 4 | LCSC | C126350 |
| 6 | LM3914N | U1,U2,U3,U4 | DIP-18_L23.0-W6.5-P2.54-LS7.6-BL | 4 | LCSC | C9408 |
| 7 | 5K | VR1_1,VR1_2,VR1_3,VR1_4 | RES-ADJ-TH_3296X | 4 | LCSC | C111778 |
| 8 | 50K | VR2_1,VR2_2,VR2_3,VR2_4 | RES-ADJ-TH_3296X | 4 | LCSC | C111780 |
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