View Full Version : CompnTemp Timer - Compensating Developing Timer

04-29-2008, 07:39 PM
CompnTemp Timer - Compensating Developing Timer software application
Version 1.0 of the CompnTemp Timer (CT) and it is now available from the website:
The CompnTemp Timer is a Java software application that uses a USB temperature probe to monitor developer temperature and runs the clock faster or slower to compensate for temperature fluctuations in the developer.
-Runs on Mac OS X or Windows machines
-Toggle between real and Comp Time
-Fahrenheit or Celsius temperature display
-User settable target temperature
-Keyboard or pull-down menu options to set time
-Optional remote USB 10-keypad start-stop & time input
-Programmable compensation curve
-User selected options (profiles) are savable
-Restorable default profiles
-Easily switch between profiles
-Count-down or Count-up timer modes
-Alert sound in countdown mode, at 00:05 sec. or user set interval
-Multiple print processing option in count-down mode

There is a review of the CT timer on pg 54 of the May/June 2008 View Camera Magazine: “A New Tool for the Darkroom” by Alan Ross and Eric Biggerstaff

The software costs $85 and the USB temperature probe can be purchased form Vernier Sci. for around $40. Details and more complete description of CT features and requirements are on the website. The manual and a demo version are downloadable for free from: http://curtpalm.com/Software.html. The demo version does not support use of the temperature probe, but one can set the temperature manually to demonstrate the compensation features.

You can see the timer in action at the Foto3 trade show.


Comments and/or suggestions are welcome.

08-14-2008, 05:59 PM
I have released version 1.1 of the CompnTemp compensating developing timer.
new features in version 1.1:

- Celsius slidebars are fully functional, when one switches to Celsius Temp. display for the timer, the slidebars now switch also
- Metronome feature, a checkbox in the pref. panel turns on the metronome, which sounds a beep (the system alert sound) at a user set interval
- Zone VI film compensation parameters has been added to the default profiles.

There are new three default compensation parameters. Zone VI paper, Zone VI film and Ilford film. A graph showing temperature vs time response for all three default settings is in the version 1.1 manual.
The CompnTemp Demo version 1.1 is available for free download from the website.

for more information:

08-14-2008, 07:05 PM
Now that's just wicked cool :D

Here's a link to the View Camera Magazine review by Alan Ross and Eric Biggerstaff;



09-15-2008, 04:11 PM
CompnTemp Kit Trial Offer.

I have a few items left over from my vendor booth at photo conference and have decided to package them together for a trial offer for the CompnTemp Compensating developing timer software.
It is a four-week trial of the system. The cost is $250 for the system and you would get: the CompnTemp Software version 1.1, a Vernier Go!Temp Temperature probe, Delcom USB foot switch, Ross probe clamp and either the red plastic or a Kodak safelight filter for the monitor*. Everything you need, except the computer, to run the CompnTemp compensating developing timer.

If after using for four weeks, you don’t feel it meet your needs you can send it all back (delete the software) and I would refund your money ($250). If you like the software but want to buy the hardware for yourself I’ll refund 250-85 = $ 160, once I receive all the hardware back.($100-120 is what you’d pay retail for the hardware with out shipping costs). Payment can be via paypal or other payment methods.

More details on the timer are on the web here: http://curtpalm.com/Software.html including links to the hardware venders.

Contact me if you are interested and we can arrange the details.

*As with any new light source in the darkroom, you should do your own film/paper fog test with the timer and your computer before you develop.

05-05-2009, 01:39 PM
CompnTemp 1.11 has been released. New features in this version are:

- single click to zero timer and restart in count up mode

- option for profile label in main window - shows current profile in main so you can easily tell which profile is currently active

- Start/stop beep in count down mode - option to have timer beeps at start and stop - very useful if using timer in total darkness

Details of the timer and free downloads of the pdf manual and Demo software are at: http://www.curtpalm.com/Software.html

Curt Palm