Part I - Build a F-STOP Darkroom Timer
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- Опубликовано: 25 июн 2024
- The goal of the darkroom timer build is to make it without much fuss, it’s inexpensive and accessible to anyone with basic knowledge.
Chapters:
0:00 Introduction
2:37 Darkroom Timers
4:00 Features of the F-Stop Timer
5:13 Strip Test Demo
6:59 Build the F-Stop
7:45 Arduino Uno Build
9:05 Download the Code
9:22 In part two
Darkroom timer are simple but don’t work the way they should. At least time based ones they are linear. Photography isn’t linear. F-Stops are logarithmic, i.e twice the light or half the light through the lens aperture. The enlarger is essential a camera in reserve. This easy to build darkroom timer will not only show exposure in time but it also display in F-Stops.
F- stop printing was originally made popular by the award winning printer Gene Nocon in 1987. If you want the full explanation, you can find it in his book Photographic Printing (now out of print, but available on the second hand market), or you could take a look at this interview with him.
PURCHASE ON ETSY - DARKROOM TIMER KIT
gavinlyonsart.etsy.com/
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Blog POST: gavinlyons.photography/fstop-...
Github : github.com/glyons/Darkroom-Timer
INSTAGRAM / glyons
TWITTER / gavinlyons
PART TO BUILD THE DARKROOM TIMER
TM1638 - amzn.to/3PXTJW6
ARDUINO - amzn.to/3PXTJW6
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#darkroom #filmphotography 
Хобби
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An interesting build Gavin, very useful! I've designed one somewhat similar like yours a while ago and it makes printing so much easier. Kudos for documenting your build and making it available to others!
Thanks Sebastian, I'm working on the second part, which uses a relay and ESP 12 board, so basically with 5 wires and soldering a few pins and uploading the code - you've got the timer. Just need some help on the 3D print for the case to fit both boards.
@@GavinLyonsCreates sounds promising and simple! 3D printing is way out of my skillset, so I can't be of any help there. But I'm sure there must be someone nearby you who can help you out. Did you also consider adding an extra relay to switch off the safelight during exposure? That makes dodging and burning so much easier in my setup. Looking forward to your next video.
@@sebkanters Yes but that would make extra soldering and require additional power supply. The board I'll be using in part II is the ESP 12 1R MV which has the power supply, relay and controller all on one board. But of course I'll mention in part III 🙂
@@GavinLyonsCreates that makes sense!
Amazing idea and work! Unfortunately the link on Etsy doesn't work. Is there any chance to find this kit to buy online? Thank you
Hi Mitya,
Sorry for delay, I've updated the link to the store, however currently I don't have any enclosures made up at the moment. As I wish to make an improved to the code and add some new features.
Gavin
Thank you for your answer. Can’t wait when you finish the new version and put it up for sale. I’m definitely going to buy it. Good luck!
Hi Gavin,
Very interesting project.
I have a question regarding the test strips, you are kind of "building up" the times by adding the next exposure time with the previous one.
is there also an option so you can expose every next step with the actual time?
I hope you can follow what I mean.
In the Fadu timer you have these options and the way I find my correct exposure is by exposing every time the same part of the print by moving the the paper under a window.
Hi, Thank you for your question. It wouldn't be difficult to add that as an option 'Strip Test Window' feature. Basically just add the base time to each step? .
@@GavinLyonsCreates
Yes that is what I mean, so first expose is let’s say 1 seconds, next exposure is 1.4 seconds and so on.
Hi Gavin, such a great thing you've done! I use fadu timer since a while and was always looking for such a hardware stuff. I'll check it out and come back with comments later on.
A question I have now is about strips, fadu timer app gives me a second between the next steps to move the cardboard, I couldn't see it in your video how you have done this.
Hi Martin,
Thanks for your kind comments. There's of course a beep and a second between each exposure, to allow you to move the card. In the next video currently working using a board which has both the relay and controller on it. So a tiny bit of soldering and you've got a darkroom timer. Of course a 3D printed case is the next step...