Not much to type here, but I completely redesigned my constant current circuit. I replaced the current sense amplifier with a programmable gain amplifier, added an ATMEGA328P microcontroller, a pinout for an LCD screen, a pinout for I2C and ICSP, a rotary encoder for controlling, a heatsink, and other necessary components.

Here is the final schematic:

And here are the circuit board designs:

Link to my files and Oshpark project:
Order from OSH Park

Github Page with KiCAD files

Mini Circuit 1: Constant Current Sink – Update
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