No design changes were made. The project still contains only the existing RP2040 component and one net; it has not yet been adapted into the requested ATmega328P-based 20 A programmable electronic load.

This design will require, at minimum: input protection, power MOSFETs with heatsinking, precision current sensing, an analog control loop, ATmega328P measurement/setpoint circuitry, temperature monitoring, fan control, controls/display, and a safe auxiliary supply. Before implementation, the key requirements still need defining: maximum load voltage, continuous versus short-duration 20 A operation, desired power dissipation, current resolution/accuracy, cooling method, and user interface.

Execution stopped because your ACUs ran out.