Mini Lab Bench Power Supply (DPS3003) Powered by Einhell Batteries or DC Source

This is my mini lab bench power supply with a DPS3003 (or compatible DPSs) as main component.

It features two modes: powered by battery or powered by an external DC source. This way it is very flexible to use.

You'll need:

• 3 position switch https://www.banggood.com/Forward-Reverse-Switch-3-Positions-6-Pin-Switch-p-1167146.html?cur\_warehouse=CN
• DC power jack https://www.banggood.com/1Pc-DC-Power-Jack-Socket-Power-Outlet-Power-Socket-Female-Panel-Mount-Connector-p-1177643.html?cur\_warehouse=CN
• Banana jacks https://www.banggood.com/2Pcs-4mm-Nickel-Plated-Binding-Post-Banana-Jack-Socket-Plug-p-953213.html?cur\_warehouse=CN
• Spade connectors https://www.aliexpress.com/item/32800318960.html
• DPS3003 or similar https://www.aliexpress.com/item/32685187020.html
• Cables
• 4 M3 screws

(optional) Banana-alligator cable https://www.banggood.com/P1041B-6-in-1-1M-4mm-Banana-to-Banana-Plug-Test-Lead-kits-Alligator-Clip-Clamp-p-1254539.html?cur\_warehouse=CN 

Connections should be self explanatory.

Fusion360 project file is attached.

Reference for how to build the battery connection: https://media.printables.com/media/prints/243613/images/2196871_1afc2ff9-1001-4b8f-866d-bbf65b848e61/thumbs/inside/1920x1440/jpg/img_20220717_150359.webp