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Cheap and good PCB etching solution.....

Discussion in 'Electronic Projects' started by Rolf, Aug 24, 2006.

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  1. Krumlink

    Krumlink New Member

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    I used permanent marker :D (sharpie)

    It works great if you have 2:1 Mixture, but dont experiment with different values. It works best.
     
  2. electrobug

    electrobug New Member

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  3. joseph@e-tech

    joseph@e-tech New Member

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    do you use that UV lamp for presensitized pcb? i don't think a black light can develop the presensitized pcb
     
  4. dave

    Dave New Member

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  5. kasamiko

    kasamiko Member

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    What is the common commercial name for Hydrogen Peroxide?

    TIA
     
  6. mneary

    mneary New Member

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    I've never heard any other name. Wikipedia lists:

    μ-1κO,2κO’-Dioxidodihydrogen
    Dihydrogen dioxide
    Hydrogen dioxide
    Dioxidane
     
  7. kasamiko

    kasamiko Member

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    Can i used the one that is used as wound disinfectant?
     
  8. 3v0

    3v0 Coop Build Coordinator Forum Supporter

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    I know this is a reply to a rather old post.

    Instead of laser labels I use 3M blue painters tape. It is less gooey.

    Pulsar transfer paper is very good but it may be hard to find outside the US. It has a starch coating that disolves in water. If your laser printer can print it, it will end up on the PCB. Neat stuff.

     
  9. Rolf

    Rolf Member

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    I am pretty sure it is the one we are talking about. The stuff I use said on the bottle: "First Aid Antiseptic Oral Debriding Agent".
    Active ingredient: Active ingredient: Hydrogen peroxide (stabilized) 3%
     
  10. Gordz

    Gordz New Member

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    Peroxide is the 'common' name, it is a a bleach for hair and an antiseptic. It comes in different strengths, and loses strength whilst stored. The 'strength' can be measured by the volume of oxygen which is liberated from a given volume of Peroxide on an organic matter sample.

    Why are we asking this ?
     
  11. Gordz

    Gordz New Member

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    Sounds great, I don't know if it is available here in Australia, or what the price is though.
     
  12. 3v0

    3v0 Coop Build Coordinator Forum Supporter

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    It is a good product. Digikey and Mouser sell it in North America.

    If I lived in a country where Pulsar did not have a distributor I would give them a call and see if it was possible to setup a distributorship.
     
  13. Gordz

    Gordz New Member

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    That USB bit wacker looks great ! Is the xtal only for the USB ? ie the PIC can still run at 32mHz ?
     
  14. 3v0

    3v0 Coop Build Coordinator Forum Supporter

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    I think the USB and processor can run from the same clock source.
    But but you can decouple them to go into a low power mode where the processor slows down but the USB is still active.
    A quick look at the datasheet.
     
  15. Gordz

    Gordz New Member

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    Thanks for the info 3v0, when I get time I'll take a closer look. I need to migrate to USB........
     
  16. ece_jm

    ece_jm New Member

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    Another good point is the process of pouring a mixture.

    To make the mixing safer, youy should pour the the mixture through the wall of the container, sliding the liquid slowly through the wall.

    Thats the usual practice that we do in chem 1. Just an idea. Thanks!
     
  17. Space Varmint

    Space Varmint New Member

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    That is awesome!
     
  18. Gloz

    Gloz New Member

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    That is what I do most of the time to save on blue.
     
  19. Overclocked

    Overclocked Member

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    I could never get the H2O2 + HCL mix working, but Copper Oxide + HCL has worked Like a Charm For me. I just use a air bubbler from ebay to help it go a bit quicker and its worked pretty well over the years. Ive been using the same etching solution for quite some time now.

    The only problem is that my HCL is from the dollar store (toilet cleaner, 10% HCL) and bubbles, so I have to do it in the shower. Still, for $1 I cant beat it (but the copper oxide is a different story-I have to make it from copper carbonate-which I got through a pottery store)
     
  20. Mike44

    Mike44 New Member

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    I've heard (or read) from some people that standing up the board vertically in an etch tank versus laying it down flat makes it go quicker? Just a myth or reality? I could understand that when the board is vertical, maybe the dissolved copper would 'sink' to the bottom keeping the etchant more pure around the PCB. I suppose a bubbler would just fix this problem though?

    And also, I just have a question about waste disposal of muriatic acid and H2O2. I'm pretty sure that if it's toxic to breathe, it definately is not safe for a septic tank. Any suggestions? I do have access to my Chemistry lab at my University, so maybe I could bring the stuff there, since they usually have a ton of inorganic waste. Don't know how happy they would be though lol!

    Mike
     
  21. Wond3rboy

    Wond3rboy Member

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    Hi Hero999,

    i wanted to know if i get you correctly: we can use a common magazine paper to get our ckt from the printer to the PCB board?I ask this because TTP is not available in my city easily.
     
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