Atmel ATMega MCU Flash Adapter for ATMega168/ATMega328

thingiverse

Update 1st April 2020: New design using two parts for easier assembly. This adapter lets you flash a TQFP-32 case-based ATMega MCU chip directly while it's being soldered to the board. The necessary pins are left out; check the picture for the pinout to connect the wires correctly with your programmer. Typically, this is used by the r/c community to reflash their ESCs (speed controllers) with an alternative firmware like SimonK for helis, drones, and all other kinds of models. The holes in the adapter are 0.5 x 0.5mm square - a 0.5mm wire or a 0.5mm pogo pin should fit well if your printer is calibrated well, otherwise use some drill or small brass nails to make them fit. Then solder cables to the wires and connect it to your USBasp programmer (please refer to the attached pinout which should be the same for your programmer).