OK, I think I have my little circuit all set up properly. Tried testing for continuity and got nothing but when I switched to diode test I got a reading of 1.266v so something's getting thru.
I drew it out by hand triple checking what I laid out on the breadboard and if it looks good the next step is figuring out how to get it soldered onto the PCB which has a different pattern of connections.
Hoping the professors give me a pass for my efforts and any constructive criticism is encouraged!
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Got the Arduino set up with it's drivers and using the Sketch program played around with the timing of that annoying onboard LED then set time on at 1 millisecond and time off at 100,000 so I don't even see the blink when it happens. Programs like that can just be deleted off the onboard chip right?
On my way. Looks like a bumpy road ahead. lol
Good work on getting arduino IDE installed. That's kinda meticulous but you'll not have to do again. Also, if you loaded the "blink" sketch, everytime you give power to the esp, the blink sketch will run. If you want it to stop then you'd load up a blank sketch or a new sketch. The esp runs whatever its been sent as long as it has power. If you want it to do something else then send it something else to loop, ie a blank sketch will loop nothing lol. You may need to have a few default lines, ie void setup () - void loop (), but you may not, I've never loaded a blank sketch, just loaded new sketches over old sketches.
Your LM334 is backwards. You've got the positive rail from the breadboard going into the negative terminal of the LM334. When you look at it with the flat side up, + is on the left, - on the right.
Also I could be wrong, but it looks like your left resistor is a 43.6Ω resistor, but your right most resistor looks like a 436MΩ resistor, which is 10,000,000 greater, as opposed to "10×" greater. I could be wrong though its hard to tell.
That's also a zener diode (see attached for a typical diode used, the attached has a Vf of around 0.6V). The zener can work, but depending on the avalanche voltage, or zener size (1V, 2V, 3V,...ect), your 0.134V constant to determine your set current will change. It can't be over a 5V zener.
What is your zener value and what mA are you looking to produce? 3mA? It can go up to 10mA.
Depending on your Vin, or input voltage, and your Iout, or output current, your LM334 may get warm.
EDIT:
Insert Raspi where I've said "esp" if you're using a raspi...