I made a very big mistake on the choice of the footprint in Kicad for
relays.
This sort of thing is a good argument for homemade circuit boards. I used to do it with pcb-express. I downloaded their software but did not order their boards. I would print out the copper layers mirror image on a laser printer.
Then iron the paper onto my copperclad board with a clothes
iron. The paper would be stuck to the board. Then dunk it all in water and peel the paper off, hopefully leaving the
toner on the board.
Then dunk the board in ferric chloride etchant. When it's etched, pull it out and scrub off the laser toner. I use a Dremel mounted on a drill press fixture and little tiny drill bits ( used to be available in boxes really cheap at Harbor Freight, but no apparently longer alas ) to drill the through holes.
The devil is in the details with this thing - lots of experimentation with different papers. But I have successfully done 25-grid parts with it.
The boards don't turn out nearly as nice as something from a board house, but you can design a board in the morning and have it in your hands the same afternoon.
- Jerry KF6VB
On 2021-04-26 10:18, Gerard wrote:
Hello,
I made a very big mistake on the choice of the footprint in Kicad for
relays. Therefore, it cannot necessarily work. So I desoldered the
relays and so I¡¯m going to make an adapter to fix it. This is the
cleanest solution than cutting the tracks on the PCB
The relay will be offset by 2.54 mm and the connection of the shot
will be corrected.
Only drawback we will see the support on 2.54mm, but it is the best
solution.
I read that we can add a protective diode on K1, can you tell me where
exactly
cdt
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