Voltlog #67 - Precision Current Reference Using REF200

I don’t have any precision current source in my lab, and these are useful for testing multimeters for example. I was looking on ebay for a current reference but I wasn’t able to find an affordable one so I’ve decided to build one using the REF200 integrated circuit from Texas Instruments.

Scullcom Hobby Electronics #40 - Design & Build a Low Current Reference https://www.youtube.com/watch?v=VrnVMnwlQXk

Schematic/Wiring Diagram http://voltlog.com/pub/ref200-schematic.pdf

REF200 Datasheet http://www.ti.com/lit/ds/symlink/ref200.pdf

Plastic Enclosure http://voltlog.com/y/jp146

4mm Banana Jack http://voltlog.com/y/e71g0

Lithium Battery Charging Protection Module http://voltlog.com/y/oy7b1

3P4T Rotary Selection Switch http://voltlog.com/y/a3wzk

18650 Lithium Battery Cell on Banggood http://voltlog.com/y/0rbhv

18650 Lithium Battery Cell With Tabs on Ebay http://voltlog.com/y/dpa3k

SO-8 Adapter PCB http://voltlog.com/y/6m4xh ... https://www.youtube.com/watch?v=_j4FrCxBqvE