Hi everyone,
Just wanted to share my first functional prototype of a design that wasn't just some blinking LEDs, which I think are really awesome at any rate.
I am starting with electronics design a bit late in life, I come from a software design background and now have the freedom to branch out to my other childhood interests.
I decided to take on a constant current load in part due to need, pointless frugality, general interest and not to mention the sheer wealth of information that has been generated by Dave and this community.
There are many thing I know are missing and things I want to add, first and foremost input protection for reverse voltage followed by a rudimentary voltmeter and ammeter for live display.
My hope is to eventually get the specs handling up to 100V at 1.5A or up to 150W at lower voltages. I'm currently using two Bourns power resistors (1ohm each, in parallel) being switched by an IRL540NPBF power mosfet. The opamp is an LM358n from an Amazon lot, getting an offset voltage (I think that's the term) that leads to a minimum 22mA draw so I feel like opamps and their tuning are going to be my next deep focus.
I am attaching some photos of the current prototype, initial schematic, as well as some bonus of the amazing equipment I am lucky to have on loan right (see if you can guess which devices I actually own
)
Any kind of feedback would be great. Thanks, and greetings.
P.S. Hi-Res in case anyone cares:
https://imgur.com/a/4mI6JpJ