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⚡ *Never struggle with battery Charging again!*
I built a versatile Li-ion battery charger with a visual 10-LED fuel gauge! In this video, I take you through the entire process: from PCB design and assembly to troubleshooting a classic *LM3914* scaling mistake.
You'll see the full journey of creating this practical circuit, powered by *Altium Develop* the professional-grade, browser-based PCB design tool that makes complex projects accessible.
You'll learn how to:
1️⃣ How to Design a Complete Battery Management System
2️⃣ Master the LM3914 Bar Graph Display Driver
3️⃣ Professional PCB Design & Assembly Workflow
4️⃣ Critical Debugging & Troubleshooting Techniques
5️⃣ How to Perform a Circuit Rework
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🛠️ *TOOLS I USED*
*Visit Altium Develop* : Design your own PCBs → https://www.altium.com/yt/diyguychris
*JLCPCB* (Discount): Order purple PCBs for $2 → https://jlcpcb.com/?from=TIP
*Online Altium Project Files* : Access here → https://diy-guy-chris.365.altium.com/designs/8AF047DD-4327-412B-B488-0B64099ED05A#design
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📁 *PROJECT FILES*
Check full GitHub repo : https://github.com/BEEMB/Simple-Battery-Charger
Circuit Schematic : https://github.com/BEEMB/Simple-Battery-Charger/blob/main/Schematic/Simple%20Lithium%20Charger.pdf
JLCPCB-optimized Gerbers : https://github.com/BEEMB/Simple-Battery-Charger/blob/main/Fab%20Files/Gerber.rar
BOM File : https://github.com/BEEMB/Simple-Battery-Charger/blob/main/Fab%20Files/BOM.xlsx
Pick-and-Place files : https://github.com/BEEMB/Simple-Battery-Charger/blob/main/Fab%20Files/PickAndPlace.xlsx
3D Assembly aid model : https://github.com/BEEMB/Simple-Battery-Charger/blob/main/Fab%20Files/Assembly%20Aid.STL
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🔧 *BUILD ESSENTIALS*
PCB Assembly:
Purple PCB from JLCPCB
💧 Solder Paste: https://www.amazon.com/Chip-Quik-TS391SNL50-Thermally-No-Clean/dp/B096BLV4SD?crid=K7YLBV66VCDX&dib=eyJ2IjoiMSJ9.ft-uLRHGFPyOeI-ExF4zS2yCRCy8ozl4mRqfBhoOKi8JEQkzqYgcFoRLbi3EfiPLez85mV1RXBIprhVbFmQcPuL_8FIZ8W7G52DNVhST1gw.ZkbqU-ZDzAjuUPq3Ayg9n4lthTTBCPXPVcPI_DSWRsA&dib_tag=se&keywords=ChipQuik+TS391LT&qid=1748791195&sprefix=chipquik+ts391lt%2Caps%2C616&sr=8-4&linkCode=ll1&tag=megadas-20&linkId=7a8df4d8dce9dd273edcc4091691c6e7&language=en_US&ref_=as_li_ss_tl
💧 Flux cleaner : https://www.amazon.com/Chemtronics-Flux-Off-Concentrate-Remover-Aerosol/dp/B01N2KD6I9?crid=1V6TRHU30N8EQ&dib=eyJ2IjoiMSJ9.H_eVxb3YrBpHgz5xTdaekA4aD_CbaIJO2KzFD5d8Qbe-AYYlPR_uWahTUaDt6HGHon9jL-2XA6EG4Gm6bmpt2WcNtYdwT6sdC1KxJPe6H0jyXscz46rB6e-owon6B6mHu7zBEMtl_nTuizd7MbZZ1w917xmcO8qpZX0cL2EkyBOgIMibpKhosdpXUbG9jIrVxVzu-0y5zeIy2xWFPvCUzTBRNDg5BpaOUiMjw2yz1Sclrgds9yc5vwXLLM6yME95EtO-c1FVrBGAFbojnRY04ePTquezVzDOhlWHZT5eQuTXaiFGbpjPSqpRDF2LU5jjqFlUKn-AZX7jvlfB-b4oQg.mXHVx6_qewX02deBi2hnGUdERuEzzqMwN6lfdYQPnyE&dib_tag=se&keywords=Chemtronics+Flux-Off&qid=1743117209&sprefix=chipquik+smd291ax%2Caps%2C362&sr=8-1&linkCode=ll1&tag=megadas-20&linkId=00ff3d87285995a5efad8a1842266833&language=en_US&ref_=as_li_ss_tl
🔥 Hotplate MHP50 : https://amzn.to/4koSjR5
🔥 Soldering station : https://amzn.to/43He33k
🎯 Precision Tweezers : https://amzn.to/3StKe1b
Debugging Tools:
🔎 Digital microscope Camera : https://amzn.to/3ZH3En2
🔌Digital Multimeter : https://amzn.to/4dShpFp
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⏱️ *CHAPTERS*
0:00 – Project intro
0:44 – Circuit fundamentals
2:16 – Circuit Schematic Altium Develop
4:25 – PCB Ordering & Unboxing
5:31 – PCB Assembly (Bottom side)
6:54 – PCB Assembly (Top side)
7:51 – First test
8:44 – Debugging
11:22 – Final test
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🔗 *MORE PROJECTS*
Check my Battery Health Monitor video: https://youtu.be/RCJagutQ1Ck
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★☆★ 💻 FOLLOW ME BELOW 💻 ★☆★
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#diy #battery #charger