I know you said you don’t have access to cnc, but highly consider buying a laser diode engraver from banggood or ebay or whatever.
I have a 2.5w laser module connected to my ?desktop cnc mill.
I spray a black spraypaint on my pcb, then laser away the paint. Etch and done. I also drill my pcbs with my mill in the same operation.
For stencils I use kapton tape and the laser. Smear some solder paste onto the kapton and peel off, leaving the pads covered in solder paste. Works quite well.
If you forgo the drilling, a laser engraver will do.
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On 25 Jan 2021, at 12:28, Leon via groups.io <leon355@...> wrote:
?
Muriatic acid is hydrochloric acid, often called Spirits of Salt here. Amazon sells it, as do most hardware shops.
Leon
On 25 January 2021, at 10:06, David Slipper <softfoot@...> wrote:
Hi, I need a way to make small cheap SMT stencils at home - I do
not have a CNC or have access to one so I would prefer the toner
transfer and etching method that seems popular in some quarters.
I loved the idea of using the thin aluminium of a drinks can
but he uses a mixture of Muriatic Acid and Hydrogen Peroxide and I
have found Muriatic Acid rather hard to find in the UK.
Has anyone used this technique ?? How good is it ??
Are there alternatives to Muriatic Acid?? or where can I get it
in the UK ??
What other DIY methods work well ??
Best regards,
Dave
