Noob Power Supply Question

[vargoal]

Hi EEVBlog,

I am a high school student interested in becoming a computer engineer. I am thinking about making a software controlled power supply. Because I am a fan of EEVBlog I immediately recalled the uSupply video series. I also wanted to mod the design a little bit because hay i'm an engineer. I downloaded the Rev C Schematic from the forum(http://www.eevblog.com/files/uSupplyBenchRevC.pdf) I want to add a atmega328 and an IR receiver so I can adjust the supply from my phone which has a IR transmitter. I was wondering if i could drive transistor Q2 on the schematic directly from my microcontroller which is measuring the current with the INA219 chip. I realize i will gain a little noise and it probably will not react as fast but i think the 16 MHz of the atmega328 i plan to add will be enough for my needs. One reason I am trying to drive the transistor directly is that I want to reduce the number of parts. Do you think this will work?  Any advice for a future computer engineer would be appreciated. Also any ideas for other changes to the uSupply would be great.

[Christopher]

Try controlling an LM317 with a micro first. Then add bits.

Baby steps!