My LED enlarger lightsource instructions / Complete parts list and build

[elgatosuizo]

Hi Will. I'm so glad you were able to put it together so nicely. Everything looks very clean and tidy. Just out of curiosity, what are the power resistors on the back of the LED's for?

[willwilson]

Marco, those are heaters that were used for the old florescent lamp to help stabilize it during printing. They are riveted to the panel and I decided to leave them instead of cutting them loose.

I also used the existing wiring block, switch and light to wire up the power supply, so you get a red power light and on/off switch on the light box.

[Tin Can]

The heaters used a Thermistor

I should show you guys the Made by General Motors for Howard Bond as 'Govt Work'. A 12X12 Aristo enlarger head Stabilizer which means in a factory, something custom made for a big wig.

Rocket Science for sure

[Kodak]

Hi,
This looks amazing!
Maybe I overlooked it, but does the timer also have f-stop sequence abilities?

[Ethan]

If it doesn't, F-Stop printing isn't very difficult to add to this type of program. For the enlarger timer/head I built, I programmed in an F-Stop mode, and making it work with these LEDs should be fairly simple. If you want, I can send you the code I wrote for mine, and if you know some basic arduino programming adding in the f-stop function to this timer should be mostly copying and pasting

[Kodak]

That would be great, Ethan.
I can manage to add your script than into the original code.
This is a very nice new years project :-)

Thank you in advance.