| Integrated Circuit (IC) | |
| LM134 | |
| TO-92 | |
| 3 Terminal adjustable current source, 1uA to 10mA | |
| http://www.schematicsforfree.com/archive/file/Misc/Temperature%20Controls/12V%20Temperature%20Controller.pdf https://octopart.com/search?q=LM334 | |
| www.ti.com/…/lm334.pdf |