9V Battery Status Indicator Circuit
About the 9V Battery Status Indicator Circuit PCB
9V Battery Status Indicator Circuit is an open source PCB design by JKCadilo14-CpE, published on GitHub under the MIT license. It is a 2-layer board measuring 71.1 × 50.8 mm, with 12 components from 7 distinct parts.
By type, the board carries 5 resistors, 3 diodes, 2 transistors and 2 connectors.
It belongs with the power & battery and test & measurement designs in this gallery.
From the project
Collection of electronic circuits I designed, tested, and documented using KiCad
A beginner-friendly 9V battery indicator project using a zener diode reference, BC547 transistor stages, and red/green LED outputs.
This project demonstrates a simple 9V battery status indicator. A 9V battery is connected to the input, and the zener/resistor/transistor network steers the indication path to either the green LED or red LED.
Based on the verified prototype, the green LED illuminated when testing an approximately 8.11 V 9V battery, while the red LED illuminated when testing an approximately 2.90 V 9V battery. The exact transition voltage between these indications has not been…
9V Battery Status Indicator Circuit bill of materials (BOM)
12 components, 7 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | BC547 | TO-92_Inline | Q1, Q2 |
| 2 | input | PinSocket_1x01_P2.54mm_Horizontal | J1, J2 |
| 1 | Green_LED | LED_D5.0mm | D1 |
| 1 | Red_LED | LED_D5.0mm | D2 |
| 1 | 6.2V | D_A-405_P7.62mm_Horizontal | D3 |
| 3 | 47K ohms | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R4, R5 |
| 2 | 330 ohms | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R3 |
9V Battery Status Indicator Circuit design files
The KiCad project lives in the JKCadilo14-CpE/DIY-Circuits repository on GitHub; these links point at the commit this page was built from.
9V Battery Status Indicator Circuit: common questions
How big is the 9V Battery Status Indicator Circuit PCB?
The 9V Battery Status Indicator Circuit measures 71.1 × 50.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 9V Battery Status Indicator Circuit?
12 components, from 7 distinct parts. The full bill of materials is listed on this page.
Where can I download the 9V Battery Status Indicator Circuit design files?
From the JKCadilo14-CpE/DIY-Circuits repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the 9V Battery Status Indicator Circuit design in my own project?
Yes, under the terms of its MIT license, which JKCadilo14-CpE chose for the repository.
More boards in DIY-Circuits
Water level indicator
101.6 × 71.1 mm18 parts2LMIT0
Astable miltivibrator
71.1 × 76.2 mm12 parts2LMIT0
Clap switch circuit
61 × 40.6 mm10 parts2LMIT0
Obstacle detector
76.2 × 45.7 mm8 parts2LMIT0
Hidden Wire Detector
71.1 × 35.6 mm7 parts2LMIT0
Laser Alarm Security Circuit
50.8 × 45.7 mm7 parts2LMIT0
Fire alarm system using photodiode
50.8 × 50.8 mm6 parts2LMIT0
Light-Activated Switch
61 × 35.6 mm6 parts2LMIT0
Temperature controlled dc fan
71.1 × 30.5 mm5 parts2LMIT0
Automatic hand sanitizer
86.4 × 35.6 mm5 parts2LMIT0
Touch sensor circuit
50.8 × 50.8 mm4 parts2LMIT0
Similar boards
StackLink
gusmanb
52.3 × 10.5 mm5 parts2LGPL-3.05.0k
AnalyzerBoxPCB fork
52.7 × 47.9 mm54 parts4LGPL-3.05.0k
LevelShifter
28.3 × 39.8 mm21 parts2LGPL-3.05.0k
Stack chan
stack-chan
50 × 50 mm33 parts2LApache-2.01.7k
Display Carrier
AxxAxx
35.6 × 58.2 mm5 parts2LGPL-3.01.7k
ControllerCurrentShuntAddOn
stuartpittaway
26 × 16.9 mm9 parts2LCC-BY-NC-4.01.1k