NOTE: This case study has been tested and functions as specified and is provided free at GitHub repositories through an automated email response below the case study on this page. ER is a professional design house and monetary compensation is required for additional work toward this design enabling your monetary success, but conversation is welcome and appreciated toward improving this design and or its repository.
WARNING: Think critically while operating and or redesigning this system. Open electronic circuitry can be dangerous due to easily shorting circuits which can generate immediate and intense heat resulting in fire. This is only one example of ill advised use.
PURPOSE: This is a hardware design capable of charging 4 Li ion cells. The design employs four different circuits and charge currents: 100mA, 200mA, 400mA, and 800mA. The design files were created with Eagle Cadsoft v7.7 as a two layer board. Free Eagle version would be capable of viewing, and editing these files for redesign.