Best deal on copper etching kit

[groovtubin]

Can anyone help with a link on this?

Thank you!

jim

[martin manning]

For what purpose? Art or electronics?

[Littlewyan]

If you mean electronics then this may be of help

http://www.ebay.co.uk/itm/131199024147? ... EBIDX%3AIT

[groovtubin]

For what purpose? Art or electronics?

Hi Martin, gotta build a HRM board ala the real thing! I`m lookin fwd to it! Anyone with a link here stateside USA? Thanks for link in UK!

jim

[martin manning]

If I were aiming to make just one HRM board I'd just get some copper clad and use a Sharpie pen for resist. If you want to get more sophisticated than that maybe check out this site: http://www.jameco.com/Jameco/PressRoom/makeoneetch.html You can get small photo resist-coated boards, and the how-to video is pretty good. I like to tin plate home-made PCB's for solderability and corrosion resistance, and you can do that easily using MG Chemicals 421 Liquid Tin.

[Smokebreak]

+1 ^^
I used the photoresist boards a while back for a IIC+ preamp and etched with vinegar,salt,peroxide. Worked great. I hacked some traces while cutting the boards, and a sharpie worked fine for fill-ins. For 1 HRM board I'd use a sharpie and skip the transfer process.

Mouser has all the non-household items-

Developer : http://www.mouser.com/ProductDetail/MG- ... eNnQ%3d%3d

Boards: http://www.mouser.com/Tools-Supplies/Pr ... ?P=1yygums

How to : http://makezine.com/projects/cheap-frie ... b-etching/

It ain't gonna be too cost effective to do 1 HRM board, though. You might as well do a bunch on 1 large board. You can put me down for one

[ToneMerc]

If I were aiming to make just one HRM board I'd just get some copper clad and use a Sharpie pen for resist. If you want to get more sophisticated than that maybe check out this site: http://www.jameco.com/Jameco/PressRoom/makeoneetch.html You can get small photo resist-coated boards, and the how-to video is pretty good. I like to tin plate home-made PCB's for solderability and corrosion resistance, and you can do that easily using MG Chemicals 421 Liquid Tin.

I agree use a sharpie and the ferric chloride. Jim, if you can't find the MG chemicals locally, shoot me an email. I can get the MG Ferric Chloride and the economy etching kit locally.

Mike

[groovtubin]

Thanks everyone for the help, ill let everyone know howgozit!

jim

[martin manning]

I don't like ferric chloride, and have switched to using one part muriatic acid (from the hardware store) into two parts 3% hydrogen peroxide (from the drugstore). Easy to get, cheap, and it works quickly. You can make up only as much as you need and then toss it. For an etching tank, nested disposable plastic food storage containers work well, with an inch or two of hot water in the lower one (to speed up the reaction) and the etchant in the upper one. Wear rubber gloves, eye protection, and do observe the order for mixing the chemicals above. A long time ago I learned this rhyme: "May his rest be long and placid. He added water to the acid."

[Cantplay]

If you laser print onto a clay glazed photo paper you can hot iron it, and the toner will fuse to the copper. soak in water to dissolve the clay and release the paper.

John

[davent]

I don't like ferric chloride, and have switched to using one part muriatic acid (from the hardware store) into two parts 3% hydrogen peroxide (from the drugstore). Easy to get, cheap, and it works quickly. You can make up only as much as you need and then toss it. For an etching tank, nested disposable plastic food storage containers work well, with an inch or two of hot water in the lower one (to speed up the reaction) and the etchant in the upper one. Wear rubber gloves, eye protection, and do observe the order for mixing the chemicals above. A long time ago I learned this rhyme: "May his rest be long and placid. He added water to the acid."

Plus one on this. Only need a couple tablespoons of each and can use the two chemicals for other things as well, may have the perixide in the med cab already.

Instead of liquid tin, which i find only effective if you solder soon after you apply it, just spray the copper side of the board with a clear or transparent lacquer, waterbased or solvent. You can solder directly through it,vaporizes on contact with the iron and will provides endless prevention of oxidation, looks better then Liquid Tin too.

What's an HRM?
dave

[ToneMerc]

I don't like ferric chloride, and have switched to using one part muriatic acid (from the hardware store) into two parts 3% hydrogen peroxide (from the drugstore). Easy to get, cheap, and it works quickly. You can make up only as much as you need and then toss it. For an etching tank, nested disposable plastic food storage containers work well, with an inch or two of hot water in the lower one (to speed up the reaction) and the etchant in the upper one. Wear rubber gloves, eye protection, and do observe the order for mixing the chemicals above. A long time ago I learned this rhyme: "May his rest be long and placid. He added water to the acid."

I will have to try this soon, brick acid and peroxide....thanks MM.

TM

[davent]

I don't like ferric chloride, and have switched to using one part muriatic acid (from the hardware store) into two parts 3% hydrogen peroxide (from the drugstore). Easy to get, cheap, and it works quickly. You can make up only as much as you need and then toss it. For an etching tank, nested disposable plastic food storage containers work well, with an inch or two of hot water in the lower one (to speed up the reaction) and the etchant in the upper one. Wear rubber gloves, eye protection, and do observe the order for mixing the chemicals above. A long time ago I learned this rhyme: "May his rest be long and placid. He added water to the acid."

I will have to try this soon, brick acid and peroxide....thanks MM.

TM

I may have read sonewhere that Sharpies don't work so well as a resist with this etchant so may want to check it out before committing to a pcb etch... or maybe i'm thinking of something else.

[drew]

What's an HRM?
dave

Hot Rubber Monkey/Hot Rod Marshall

Internal tone stack for the OD - trimmer pots on a daughterboard.

[davent]

Thanks Drew!