davedarko
There are three outputs possible
- direct output on the anode pins
- in a voltage divider as a constant current source with an 1M resistor
- with an LM358 OP amp
Notes
- The values aren't fixed at this point
- unused 4th OP amp is handled like: https://www.maximintegrated.com/en/app-notes/index.mvp/id/1957
- ordered after midnight
- LEDs as lightsource, also "shielded" by resistor
You get a "like" for "ordered after midnight" ;)