DIY Powerbank

thingiverse

This DIY Powerbank was designed and built at the lab using readily available components and a custom-designed, 3D-printable case. The necessary components can be found at www.deltakit.net and other local vendors. They include: 1. USB DC-DC Converter: deltakit.net/product/usb-dc-dc-converter/, which converts the battery voltage to a regulated 5V USB power supply. 2. TP4046 Li-Po Battery Charger: https://www.deltakit.net/product/lipo-battery-charger-module-tp4056-1a-micro-usb/, used for safely charging and utilizing the Li-Po cell in the circuit. 3. 3.7V 1600mAh Li-Po Cell: https://www.deltakit.net/product/3-7v-1600mah-lipo-rechargeable-battery/, which serves as the primary power source of the circuit. 4. Toggle Switch: Any toggle switch with a 6mm diameter neck will suffice. 5. 5mm Clear Epoxy LEDs: One Green and one Red to indicate power on and charging respectively. The connections are straightforward: 1. Connect the Li-Po battery to the B+ and B- connections of the TP4056. 2. Link the OUT+ and OUT- to the IN+ and IN- of the 5V Boost converter circuit. 3. Install a toggle switch in the path of the TP4056 OUT+ and the 5V Boost converter's IN+. 4. Desolder SMD LEDs from the 5V Boost Converter and the TP4056, then solder the 5mm LEDs to their respective boards. Once everything is connected and tested, assemble all components inside the case using thin double-sided tape, securing it with M3 nuts and bolts. The holes may need enlargement via a drill.