Lenovo Power Plug to USB-C

Simple adapter to convert proprietary yellow square Lenovo power connectors to USB-C PD.

Requires a 20v USB-C PD adapter like this one:

https://www.aliexpress.us/item/3256802974608811.html?spm=a2g0o.order_list.order_list_main.30.54371802793lIg&gatewayAdapt=glo2usa

Use the following schematic to wire it up, use continuity tester to figure out which cable is which following this schematic:

source: https://superuser.com/a/1246834

Unsolder the wires from original connector, connect all negative wires to (-) terminal, all positive wires to (+) terminal. Solder the proper resistor (depending on your source max wattage) between (-) and the Signal wire (center).

Worked fine with an old Lenovo Yoga 2 11"