diy f-stop timer

[Elias Sunset]

Hi All,

since I tried large format and the Zone System, I definitely kept missing a darkroom timer adapted to my needs.

Hence my decision to build my own (https://eliadarkroom.wordpress.com/f-stop-timer) and release all relevant info for anyone wanting to build one.



https://youtu.be/rmSGV807NaU


Comments welcome

Cheers

Elia

[Elias Sunset]

Dear All,

a User's manual is available here (https://eliadarkroom.files.wordpress.com/2017/08/monkito-users-manual.pdf) now

Cheers

[Tim Meisburger]

Is there no sound in the video?

[Elias Sunset]

Is there no sound in the video?

No sound... I was unaware of the copyright of my soundtrack....I had therefore to remove the sound.

When possible (very busy these days), I will upload a video showing the test strip with a real demo of split grade printing with test strips and dodging burning sequences.

Cheers

[Ricardo Maydana]

Felicitaciones... se puede decir en varios idioma Congratulations

[Elias Sunset]

Felicitaciones... se puede decir en varios idioma Congratulations

Aguyjevete my friend ! Thank you

[Tin Can]

Dear All,

a User's manual is available here (https://eliadarkroom.files.wordpress.com/2017/08/monkito-users-manual.pdf) now

Cheers

404 — File not found. No manual.

Looks great!

[ic-racer]

So, if I'm at f2.93 and I want to add 1/4 stop exposure, I would...get my calculator. In which case it is easier to add 1/4 stop exposure to the base time in seconds (multiply by 1.18). Maybe I need to see the manual.

[Tin Can]

So, if I'm at f2.93 and I want to add 1/4 stop exposure, I would...get my calculator. In which case it is easier to add 1/4 stop exposure to the base time in seconds (multiply by 1.18). Maybe I need to see the manual.


Agreed
I have enough trouble setting my DIY Gas Burst timer with 3 time variables and pressure. I REALLY need the manual for Elias' f=stop timer.

[Elias Sunset]

Agreed
I have enough trouble setting my DIY Gas Burst timer with 3 time variables and pressure. I REALLY need the manual for Elias' f=stop timer.

Sorry all, I reorganized the links and menu...

Here is the new location for the manual (https://eliadarkroom.files.wordpress.com/2017/08/monkito-users-manual-rev-b.pdf)

Anyway, if lost, please refer to the main page (https://eliadarkroom.wordpress.com)

Thank you all

[Elias Sunset]

Ic-racer, no, no need of any calculator.
You can set the f-stop interval anytime in 1/100, 1/10, 1/4, 1/3, 1/2 or full stop. Once done (I use 1/10 by default ) you may adjust your time whenever you want, directly by rotating the encoder, no need to confirm anything, just set the f-stop/time and start the timer.
Once you have done a test strip, no need to set your time again to make your exposure, just select the strip of your choice and expose, nothing more.
Hope to be clear enough.....

[Elias Sunset]

Dear All,
these are the links to:
the latest PCB (the gerber files are available) with an illustrated BOM (https://eliadarkroom.wordpress.com/the-new-pcb-with-gerber-files/)
The code (version 1.4) (https://eliadarkroom.wordpress.com/the-arduino-code-v-1-4-for-the-last-pcb/) has been updated to match the new pinout, and
some useful info about supplying power is provided (safety first!) (https://eliadarkroom.wordpress.com/monkito-burning/)

All the best

Cheers

[Tin Can]

Elias, an admirable effort. I read everything including the manual, the fire story, and the PCB breakout.

However, unless I get real bored in March I have no time to make one.

I have too many other projects to do by June 1, 2018 then it's vacation!


Thanks for the follow-up and it does look good!

[Cor]

Yes, thanks for the effort..if my StopClock would ever brake down..I hope not, but than there is an alternative and a learning curve..never did any tectonics myself, although I have soem understanding theoretically..perhaps a nice retirement project..so my StopClock should work about 14 years more..;-)..

best,

Cor

[Bernard_L]

Just what I was dreaming of. I have some experience in old fashioned electronics but not in microcontrollers. This detailed project description is maybe just what I needed to take the plunge.
Congratulations! There are other timers around, but this one seems to have the best thought-out interface.

[Elias Sunset]

Hi All,
thank you for all the nice comments, really appreciate.

Here is a new video showing the latest developments: a LED variable contrast enlarger head interface to ease the split grade printing process (https://youtu.be/IniWpRyZSDk)

Again, thank you All

Cheers