Quote:
Originally Posted by Wendymott
Hi David..... No pictures.... but I get what you mean....I will buy some of this film you use and give it a whirl..as you say in the film he is not doing a complex pcb and any movement will incur registration problems.
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Don't know what happened to the pictures in my earlier post Wendy!
They were there when I reviewed the post, but have since disappeared so here they are again.
Re toner transfer, forum member Tony, 'Aerodyne' recently posted a thread on his experiences with film he'd discovered and was impressed with:
https://www.vintage-radio.net/forum/...highlight=PCBs
As to the negative dry film technique that I've used for the last two or three years, there are a couple of youtube videos at the links below. The first one shows an experimental layout which includes very thin tracks, very close together to see how they turned out. He deliberately pushed it to the limits, and the results were variable, but perhaps not as bad as might have been imagined.
https://www.youtube.com/watch?v=2hQfGtSFe_0
https://www.youtube.com/watch?annota...&v=cRCFGZxmob0
To source the negative UV photoresist film, search for:
'30cm x 5M Photosensitive Dry Film For PCB Circuit Production Photoresist Sheets'.
That will find it at £6.68 post free for a 5 metre length 30cms wide.
A search for '15cm 2m Photosensitive Dry Film PCB Portable for Circuit Photoresist Sheets' will find a 2 metre length 15cms wide for £1.60 post free.
The last pic is a PCB made by the UV dry film process.
There have been numerous thread on homebrew PCBs so I won't reiterate what's already been said.