I don't know about replicating the same ages-old beginner project everyone else has done and proudly shown to their potential employers. It's like having a kid,
you are very proud of it (as you should be!), but everyone else has them as well and yours don't look that special to them.
Well, maybe if you are applying to a really "low-level" job, like in manufacturing? Otherwise, it doesn't show much passion nor expertise IMHO. Just an opinion, I'm entitled to one as well!
I mean, at the time you start moving from a hobby to profession (if that ever happens), the chances are you are already a few steps ahead of that power supply project, and could bring a more recent, more ambitious project that shows off your latest skills better.
The first project I brought with me to a job interview was a microcontroller controlled (before the Arduino era) 10-channel temperature sensor / regulator / heater control (for chemical process control) bare DIY etched PCB hotmelt glued to a plastic plate, and I showed off the UI, menus, temperature measurements... The interviewer wanted to measure his body temperature and it showed some 36.6 degC, success
. Made a better show than a 7805 power supply.
A guy I knew, an avid fresh hobbyist, made amazing progress in little time and I think he brought his IoT smart coffeemaker thingie (which automatically weighed the amount of leftover coffee in the pan, its age, reported it to the social media, and so on) in some job interviews IIRC. I'm 100% positive it's a better show about his skillset (ESP8266, strain gauge amplification, AVR, ADC, internet protocols, product design and prototyping), than being able to neatly route wires to a 7805 and buy expensive-looking connectors from a distributor. This was something he built in less than a year after starting from scratch!
Note, no offense intended. Just wondering your assertiveness on this. Clearly it's an important project
for you, and I appreciate that. Building a
bench (sorry) power supply is not a bad beginner project. But it's overrated, IMHO, and the functional end result tends to be disappointing. The remaining effect is psychological, and this means it's very much
personal with no ground truth. Whether others (such as employers) find the power supply project interesting, is up to a debate. Having done a few interviews, I would prefer the bench supply builder over someone who's done
nothing, but would prefer a hotmelt glue IoT coffeemaker crazy scientist over the power supply builder if the job requires innovation and design experience on modern fields. For a production work position involving tying cables, I would pick the one who showed a neat power supply, any day - he/she is probably a very reliable and dependable person.