From 1807a082f3424db1e5c38dc17718fd1f1a0ac6f3 Mon Sep 17 00:00:00 2001 From: Mark van Renswoude Date: Wed, 7 Nov 2018 22:42:55 +0100 Subject: [PATCH] Updated bom (markdown) --- electronics/bom.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/electronics/bom.md b/electronics/bom.md index 1d5f652..66f486e 100644 --- a/electronics/bom.md +++ b/electronics/bom.md @@ -22,9 +22,9 @@ Use transparencies designed for your printer type. The ones I use are Esselte 57 http://www.123inkt.nl/Esselte-57161-transparanten-voor-inkjet-printers-50-bladen-57161-i22534-t33400.html ### 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. +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. Be aware that the process is different with the presensitized boards (positive vs negative exposure, different chemicals), so don't follow my guide if you want to etch those. -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. +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.