LM3914 Battery Level Meter

1 year ago

Profile:LM3914 Li-Ion Battery Level Meter

Open source license: GPL 3.0

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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

Documents

LM3914N Battery Level Meter

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LM3914N Battery Level Meter

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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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