Project Logs

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• Up and running

  marcellothearcane • 08/24/2020 at 12:00 • 0 comments

  I had to order some cheap red LED strips from Amazon, and it's surprisingly hard to find plain and simple 5v ones.  These arrived, and I added 2N3904 NPN transistor to drive them.

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• To neopixel, or not?

  marcellothearcane • 08/14/2020 at 15:01 • 0 comments

  The tone() library says not. Well, the Neopixel library says no to the tone() library.

  A shame really, since I had some spare Neopixels kicking around. Originally I planned to use them, but it looks like I'll have to find some cheap red LEDs instead, and drive them with a transistor.
  

• Assembly done

  marcellothearcane • 08/14/2020 at 11:06 • 0 comments

  So, I finished my (rat's nest) wiring, and there doesn't appear to be any short circuits when I turn it on.

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• Faulty display!

  marcellothearcane • 08/14/2020 at 10:26 • 0 comments

  It turns out the display from The Pi Hut was faulty, so I returned it for a new one. I also screwed up the illuminated red push switch by blowing the LED inside (idiot!), so I needed a new one of those too.

  I'm soldering wires to various buttons and switches, and the main issue at the moment is making sure I don't glue or fix anything too soon.

• First look at components

  marcellothearcane • 07/25/2020 at 22:02 • 0 comments

  I bought this seven segment display from The Pi Hut. There is a reason, as well as just being cheap.

  It's red, which is good for B&W paper (there will be an option for zero display output however). It also has four decimal point lights, rather than a clock-style colon. I'm going to use this as an indicator for which timer is currently active (there will be four), so I can preset enlarger, dev, stop, and fix timers.

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• Hello world!

  marcellothearcane • 07/22/2020 at 17:27 • 0 comments

  I am making an integrated safelight/timer console, which will have a countdown timer with three preset timer options, and an enlarger switch for controlling that when I need to.

  Neopixels? Overkill? Mais oui! But I have some left over from an old project, so I may as well use them for something.
  

  I'm envisaging quite a custom light setup, with some lights underneath the worktop as well as along the back edge. You generally need to keep them low and dim around paper, despite its orthocromaticity.

  I've bought bits from The Pi Hut, so hopefully that's all I need. So far the total is around £30.

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