In this project I will show you how we can use the classic LM3914 IC to create an LED Battery Level Indicator. Along the way I will show you how the IC works and explain why it is not the most precise circuit for a Li-Ion battery pack. And at the end I will show you how I created my own, more precise Battery Level Indicator circuit with a couple of simple components. Let's get started!
Step 1: Watch the Video!
The video gives you all the information you need to create your own Battery Level Indicator. During the next steps though I will present you some additional information.
Step 2: Order Your Components!
Here you can find a parts list with example seller:
2x LM324: https://amzn.to/2IZA0zb
6x 10k Trimmer: https://amzn.to/2Nzt8fJ
6x 2k Resistor: https://amzn.to/2m1GG6M
6x 5mm LED: https://amzn.to/2KW3kbT
1x Boost Converter: https://amzn.to/2NzYhPV
6x 10k Trimmer: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...
6x 2k Resistor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...
1x Boost Converter: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...
2x LM324: https://amzn.to/2KO65iu
6x 10k Trimmer: https://amzn.to/2u3udnH
6x 2k Resistor: https://amzn.to/2KE0DPY
6x 5mm LED: https://amzn.to/2u9Cbeg
1x Boost Converter: https://amzn.to/2u2Htcb
Step 3: Create the Circuit!
Here you can find the schematic as well as pictures of my finished perfboard circuit. Feel free to use them as a reference to create your own circuit.
Step 4: Success!
You did it! You just created your own LED Battery Level Indicator!
Feel free to check out my YouTube channel for more awesome projects: http://www.youtube.com/user/greatscottlab
You can also follow me on Facebook, Twitter and Google+ for news about upcoming projects and behind the scenes information: