I finally built a permanent-solution current source, albeit from my junkbox, but at least now I have something to pull off the shelf as I need it. There need to be some refinements, however hopefully it inspires you to make your own out of an LM317 adjustable regulator IC. I’ll show you roughly how I made it and why such a device is useful. We’ll use it in future videos to analyze band theory of semiconductor devices - what fun! So stay tuned!!!
**sorry the audio is kind of messed up - the gain on my recorder automatically changed to max.. couldn't really reshoot this one.

More links to excellent videos on current sources... they explain it much better than I can. If you haven't subscribed to these guys, come on now!!! :
W2AEW -    • #190: Back to Basics: Transistor Curr...  
Afrotechmods -    • Constant current power supply and las...  

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