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Updated bom (markdown)

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Mark van Renswoude 2018-11-10 12:56:29 +01:00
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@ -20,6 +20,13 @@ Many people use a laser printer, but the ones I had did not deposit enough toner
The printer I use is a Canon PIXMA iP7250, which is not all that expensive. For any Canon use the official "PGI" range or cartridges, as these are pigment based. With these I do not need to double up on transparencies to get great results.
## UV light source
I started out with a UV nail polish dryer which was ok, but the timer function could only do 120 seconds. Instead I built a little UV exposure box using an array of 5mm UV LEDs, 12 x 12 spaced about 1 cm apart. These are controlled through a MOSFET by an ATMega328, hooked up to a 16x2 character LCD and a rotary encoder. The time can be set, as well as the intensity (using PWM). I may one day post the code, schematics and 3D printable enclosure.
UV LED strips will probably make for an easier build, and you can replace the bare ATMega328 with an Arduino just as easily, but I liked the challenge. The LEDs have turned out to be very effective, reducing the exposure time significantly.
Whatever you use make sure you have enough control over the light source so that you can experiment and get good repeatable results.
# Consumables
## Transparencies