Linear variable voltage and variable current limit power supply unit (PSU). Based on the following technical sources: 1) High current sensing methodology: http://www.analog.com/en/analog-dialogue/articles/high-side-current-sensing-wide-dynamic-range.html 2) Basic OpAmps - differential amplifiers https://www.electronics-tutorials.ws/opamp/opamp_5.html 3) General purpose and single supply IC LM358, LM324 datasheets 4) Projects seen described in youtube: https://www.youtube.com/watch?v=_r3_GjnwI2A https://www.youtube.com/watch?v=CIGjActDeoM Main target: implement all controlls (voltage and current) versus the ground - make possible MCU control for future upgrade Depends of the mains transfermer: - goal #1: output voltage regulated from 0 to 13V (want to include 12V output available but not as a limit for the PSU). - goal #2: output voltage regulated from 0 to 25 (want to have 24V standrd included but not asa limit for the PSU). Desing (schematics) to support 2A maximum load current - this to include matched regulating ranges both for the voltage and for the current limit. - goal #3: implement output short protection with switch-off and a need for manual reset/switch-on - goal #4: implement electronic soft-latch switch for the PSU's output to the actual load. - goal #5: implement SMPS (buck converter based?) pre-regulator to give power disipation optmization (possibly LM2576T- ADJ application?) - goal #6: use as much general purpose components as possible (example LM324 / LM358 in DIP packages for breadboard prototyping and experiments) Project timing: not clear. Depends of time I have out of the office.