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PolkaDot

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  1. Like
    PolkaDot got a reaction from jpnorair in First etch & surface mount!   
    Recently had my first go at printing a board and soldering surface-mount components. It's a straight-forward breakout for an FT230XS.
     
    Technique:
    On the etching side, I used a 2:1 mixture of Hydrogen Peroxide solution and Muratic Acid. Initially clear, it turned a lovely neon green when the copper started reacting! Etch took maybe 5-6 minutes.
    I used an "ultra fine tip" Sharpie as the resist; learned the hard way that the 'Micron' brand of super fine tip pens doesn't work for this application  :-( . I was struggling to mark the pads with the sharpie, so instead I drew a dark box across an entire row of pins then used a type of dental pick to scratch a fine line between adjacent pads. Seemed to work pretty well!
     
    I had bought a syringe of solder paste for the occasion, but ultimately I couldn't make it cooperate--globs kept bridging pins. Eventually I just put down solder on all the pads, put some flux on the pins and reflowed that way.
     
    Anyhow, it was a somewhat messy learning experience, but hopefully next I'll print/mount the whole module. Will keep you posted!

  2. Like
    PolkaDot got a reaction from tripwire in First etch & surface mount!   
    Recently had my first go at printing a board and soldering surface-mount components. It's a straight-forward breakout for an FT230XS.
     
    Technique:
    On the etching side, I used a 2:1 mixture of Hydrogen Peroxide solution and Muratic Acid. Initially clear, it turned a lovely neon green when the copper started reacting! Etch took maybe 5-6 minutes.
    I used an "ultra fine tip" Sharpie as the resist; learned the hard way that the 'Micron' brand of super fine tip pens doesn't work for this application  :-( . I was struggling to mark the pads with the sharpie, so instead I drew a dark box across an entire row of pins then used a type of dental pick to scratch a fine line between adjacent pads. Seemed to work pretty well!
     
    I had bought a syringe of solder paste for the occasion, but ultimately I couldn't make it cooperate--globs kept bridging pins. Eventually I just put down solder on all the pads, put some flux on the pins and reflowed that way.
     
    Anyhow, it was a somewhat messy learning experience, but hopefully next I'll print/mount the whole module. Will keep you posted!

  3. Like
    PolkaDot got a reaction from Fred in First etch & surface mount!   
    Recently had my first go at printing a board and soldering surface-mount components. It's a straight-forward breakout for an FT230XS.
     
    Technique:
    On the etching side, I used a 2:1 mixture of Hydrogen Peroxide solution and Muratic Acid. Initially clear, it turned a lovely neon green when the copper started reacting! Etch took maybe 5-6 minutes.
    I used an "ultra fine tip" Sharpie as the resist; learned the hard way that the 'Micron' brand of super fine tip pens doesn't work for this application  :-( . I was struggling to mark the pads with the sharpie, so instead I drew a dark box across an entire row of pins then used a type of dental pick to scratch a fine line between adjacent pads. Seemed to work pretty well!
     
    I had bought a syringe of solder paste for the occasion, but ultimately I couldn't make it cooperate--globs kept bridging pins. Eventually I just put down solder on all the pads, put some flux on the pins and reflowed that way.
     
    Anyhow, it was a somewhat messy learning experience, but hopefully next I'll print/mount the whole module. Will keep you posted!

  4. Like
    PolkaDot got a reaction from Rickta59 in First etch & surface mount!   
    Recently had my first go at printing a board and soldering surface-mount components. It's a straight-forward breakout for an FT230XS.
     
    Technique:
    On the etching side, I used a 2:1 mixture of Hydrogen Peroxide solution and Muratic Acid. Initially clear, it turned a lovely neon green when the copper started reacting! Etch took maybe 5-6 minutes.
    I used an "ultra fine tip" Sharpie as the resist; learned the hard way that the 'Micron' brand of super fine tip pens doesn't work for this application  :-( . I was struggling to mark the pads with the sharpie, so instead I drew a dark box across an entire row of pins then used a type of dental pick to scratch a fine line between adjacent pads. Seemed to work pretty well!
     
    I had bought a syringe of solder paste for the occasion, but ultimately I couldn't make it cooperate--globs kept bridging pins. Eventually I just put down solder on all the pads, put some flux on the pins and reflowed that way.
     
    Anyhow, it was a somewhat messy learning experience, but hopefully next I'll print/mount the whole module. Will keep you posted!

  5. Like
    PolkaDot got a reaction from cubeberg in First etch & surface mount!   
    Recently had my first go at printing a board and soldering surface-mount components. It's a straight-forward breakout for an FT230XS.
     
    Technique:
    On the etching side, I used a 2:1 mixture of Hydrogen Peroxide solution and Muratic Acid. Initially clear, it turned a lovely neon green when the copper started reacting! Etch took maybe 5-6 minutes.
    I used an "ultra fine tip" Sharpie as the resist; learned the hard way that the 'Micron' brand of super fine tip pens doesn't work for this application  :-( . I was struggling to mark the pads with the sharpie, so instead I drew a dark box across an entire row of pins then used a type of dental pick to scratch a fine line between adjacent pads. Seemed to work pretty well!
     
    I had bought a syringe of solder paste for the occasion, but ultimately I couldn't make it cooperate--globs kept bridging pins. Eventually I just put down solder on all the pads, put some flux on the pins and reflowed that way.
     
    Anyhow, it was a somewhat messy learning experience, but hopefully next I'll print/mount the whole module. Will keep you posted!

  6. Like
    PolkaDot got a reaction from bluehash in First etch & surface mount!   
    Recently had my first go at printing a board and soldering surface-mount components. It's a straight-forward breakout for an FT230XS.
     
    Technique:
    On the etching side, I used a 2:1 mixture of Hydrogen Peroxide solution and Muratic Acid. Initially clear, it turned a lovely neon green when the copper started reacting! Etch took maybe 5-6 minutes.
    I used an "ultra fine tip" Sharpie as the resist; learned the hard way that the 'Micron' brand of super fine tip pens doesn't work for this application  :-( . I was struggling to mark the pads with the sharpie, so instead I drew a dark box across an entire row of pins then used a type of dental pick to scratch a fine line between adjacent pads. Seemed to work pretty well!
     
    I had bought a syringe of solder paste for the occasion, but ultimately I couldn't make it cooperate--globs kept bridging pins. Eventually I just put down solder on all the pads, put some flux on the pins and reflowed that way.
     
    Anyhow, it was a somewhat messy learning experience, but hopefully next I'll print/mount the whole module. Will keep you posted!

  7. Like
    PolkaDot got a reaction from GeekDoc in 43oh PCB Logo   
    I was never a huge fan of images as text, myself. I feel like good graphics and good font should coexist.
    Or maybe 43oh needs a mascot  ;-)  
  8. Like
    PolkaDot got a reaction from cubeberg in 43oh PCB Logo   
    Or a curious 'coon, because why not.
     
    https://www.dropbox.com/s/fam980m7xvn8xbs/43oh%20Racoon%20Polka.png
  9. Like
    PolkaDot got a reaction from bluehash in 43oh PCB Logo   
    Perhaps something that sleeps a lot.
  10. Like
    PolkaDot got a reaction from bluehash in 43oh PCB Logo   
    Maybe try this guy on for size?
     
    https://www.dropbox.com/s/k1t9e04y6oxvkgl/43oh%20Polka.png
     
    Sorry for the link, but couldn't put it in the post. Also ignore that weird black stuff..
  11. Like
    PolkaDot got a reaction from roadrunner84 in Hey all, from Ohio   
    Thanks guys!
     
    roadrunner, there's a HiRel version of most of their big product lines, I was working with a bunch of DACs and ADCs--catalog stuff. 
  12. Like
    PolkaDot got a reaction from roadrunner84 in Hey all, from Ohio   
    Hello forum world.
    I actually interned with TI last year, though in HiRel not anything to do with MSP.
    I'm an RF grad student by day, mainly working with antennas. But by night I'm interested in trying to simplify (and make cheaper!) wireless connectivity for simple devices. So I look forward to learning, and contributing where I can 
     
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