Updated bom (markdown)

electronics/bom.md

@@ -1,2 +1,25 @@
 # Tools and materials
 
+[[_TOC_]]
+
+
+#### Laminator
+Some household laminators will do, just be sure it supports the extra thickness of a circuit board and possibly cardboard to help it along. I got a generic A3 laminator from AliExpress which has a temperature setting and adjustable springs. It has no brand name, but if you search for "A3 laminator" it's the one that looks like this:
+
+[[laminator.png]]
+
+#### Printer
+Many people use a laser printer, but the ones I had did not deposit enough toner to work all that well. For an inkjet printer the best results are achieved with inks based on pigments instead of dyes.
+
+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.
+
+#### Transparencies
+Use transparencies designed for your printer type. The ones I use are Esselte 57161.
+
+#### Circuit board
+I don't use boards with a presensitized photoresist layer, so any plain single or double sided board will do. Don't get the cheap cardboard ones though.
+
+Adding the film yourself is a bit of extra work, but allows you to retry if the exposure fails. Replacing the film is a lot cheaper than wasting copper.
+
+#### Photosensitive film
+Search eBay for "photosensitive dry film PCB". The rolls are blue and typically come in 30cm x 5m.