2 layers83.3 × 65.3 mm
SimonShield
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46 parts14kMIT
2 layers45.5 × 34.5 mm
Battery level indicator
2987darshan/battery_level_indicatorsimple battery level indicator circuit
- Size
- 45.5 × 34.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 8
- Nets
- 6
- Pads
- 17
- Tracks, vias
- 24, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 24 Mar 2026
- Updated
- 24 Mar 2026
Overview
Battery level indicator is an open-source printed circuit board by 2987darshan, from the 2987darshan/battery_level_indicator repository on GitHub. It is a 2-layer board of 45.5 × 34.5 mm with 8 parts on 6 nets, routed with 24 tracks and 0 vias.
It is built around the BC547. Its parts include 3 resistors, 3 diodes, 1 transistor and 1 connector. It belongs with the power boards of this library.
Main components
1README
README.mdBATTERY LEVEL INDICATOR
Overview
-A simple PCB design for battery level indicator circuit using LED's
Tools used
-KiCad
Features
-It gives a battery level indication. -The LED named FULL glows when the battery is charged -The LOW glows when the battery is discharged.
Limitations
-This is my frist step towards PCB designing and it works well for 9V battery but when the voltage of battery changes or the battery changes,it might not work as expected especially for low voltage cells like a AA battery of 1.5V and for higher voltages like 12V.
Future refinements
-improving the circuit so that even batteries of different voltages (0-25V) can be tested with the same circuit.(not very accurate).
Status
Designed and tested on a breadboard
3D View
PCB Layout
Parts
8| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 1 | 1n4007 | Diode_THT:D_DO-41_SOD81_P7.62mm_Horizontal | D3 |
| 1 | 220R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 1 | BC547 | Package_TO_SOT_THT:TO-92_Inline | Q1 |
| 1 | FULL | LED_THT:LED_D5.0mm | D2 |
| 1 | LOW | LED_THT:LED_D5.0mm | D1 |
| 1 | battery | TerminalBlock:TerminalBlock_MaiXu_MX126-5.0-02P_1x02_P5.00mm | J1 |
Questions
How big is the Battery level indicator PCB?
It measures 45.5 × 34.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Battery level indicator use?
8 parts, built around the BC547. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Battery level indicator KiCad files?
From the 2987darshan/battery_level_indicator repository on GitHub, at the commit this page was made from: the board is battery_level_indicator.kicad_pcb and its schematic battery_level_indicator.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Battery level indicator design in my own project?
Its repository states no licence, so its author keeps all rights: ask 2987darshan before reusing the design.
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