Difference between revisions of "Talking Darkroom Timer"

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(Created page with "I got tired of having to mess with darkroom timers in the dark while processing colour prints in trays, so designed and built a timer that understands entire processes and wal...")
 
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I got tired of having to mess with darkroom timers in the dark while processing colour prints in trays, so designed and built a timer that understands entire processes and walks you through them step-by-step with speech. The timer reads process information from paper instruction sheets using Aztec 2D barcodes and then times each required step.
 
I got tired of having to mess with darkroom timers in the dark while processing colour prints in trays, so designed and built a timer that understands entire processes and walks you through them step-by-step with speech. The timer reads process information from paper instruction sheets using Aztec 2D barcodes and then times each required step.
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* [https://hacklab.to/archives/talking-darkroom-timer/ Full project writeup]
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* [https://github.com/sarahemm/darkroomtimer/ Source code]
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* [https://docs.google.com/presentation/d/1hkUpVpjMMZi7exzNPtztDyM-nqk0NCPd7pgnEAlnKl0/edit?usp=sharing Slide deck from Hello, Con! 2017]
  
 
== Components ==
 
== Components ==
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== Other Information ==
 
== Other Information ==
* To generate new barcodes, you can use the [http://htmlpreview.github.io/?https://github.com/hacklabto/darkroomtimer/blob/master/generator/timergen.html Darkroom Timer Barcode Generator]
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* To generate new barcodes, you can use the [http://htmlpreview.github.io/?https://github.com/sarahemm/darkroomtimer/blob/master/generator/timergen.html Darkroom Timer Barcode Generator]
 
* There's a writeup of this project at [https://hacklab.to/archives/talking-darkroom-timer/ the HackLab.TO blog]
 
* There's a writeup of this project at [https://hacklab.to/archives/talking-darkroom-timer/ the HackLab.TO blog]
  
 
[[Category:Completed Projects]]
 
[[Category:Completed Projects]]

Latest revision as of 00:14, 26 February 2017

I got tired of having to mess with darkroom timers in the dark while processing colour prints in trays, so designed and built a timer that understands entire processes and walks you through them step-by-step with speech. The timer reads process information from paper instruction sheets using Aztec 2D barcodes and then times each required step.

Components

  • Timer itself, located above the left side of the sink near the ceiling
    • Raspberry Pi 2
    • Adafruit LCD Plate
    • Proto Plate with RS232 level shifter for barcode reader
  • Speaker above the timer
  • 2D barcode reader mounted on the shelf aimed at the wall
  • Control panel below the sink with the following controls:
    • Large green SELECT button
    • Navigation left/right control
    • Active/Standby toggle switch
  • Aztec Code barcodes on each process sheet, which contain all timing information

Usage Procedure

  • Set the Active/Standby switch on the timer control panel to Active
  • Scan the barcode for the process you want under the crosshairs that appear on the wall
    • Barcodes can be found on instruction sheets for each process that are hung up behind the door.
  • Double check that the timer is displaying the process you want to run, and press the big green SELECT button
  • The timer may ask if you want to adjust the time for specific steps.
    • If you don't, just press SELECT.
    • If you do, use the navigation buttons to change to Yes and press SELECT.
  • The timer will show and read out each step as it's ready.
  • Press SELECT to start each step.
    • If you want to run a different step instead, use the navigation buttons to scroll through.
  • To abort a step in progress, hold the SELECT button until you hear a buzzer.

Other Information