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  1. chopnhack

    PCB Cleaning after Soldering

    How do you clean your PCB's after soldering? If you were preparing to spray a conformal coating? I was thinking of using the coating to prevent oxidation for one of my projects that will be in a harsh environment. To prepare for the coating, the substrate needs to be clean and free of residue...
  2. chopnhack

    Resistor Question

    Cool, I can understand why you need to build your own now. I am guessing that you are using more LED's on the first level than the top. Do you have the arrangement fixed already? It would make it easier to understand how many LED's could be grouped together, use less wiring.
  3. chopnhack

    Resistor Question

    As much as I love making my own things, why are you making your own string of lights? Are the premade string of leds too long, or heavy for the existing project? Check out the LED resource that *steve* contributed - there are some variation of wiring schemes you can use to meet your needs. 1A...
  4. chopnhack

    Hello all!

    Welcome Sunim, down the rabbit hole you go :D No worries, there, you will have great company to help you along the way!
  5. chopnhack

    Designing a Time Delayed Relay

    Thanks Kris :) Thanks Adam! I read up a bit on PCB construction and relied heavily on Kris for the things I didn't understand or did wrong. Agreed, I am concerned with some of these copper pours, despite having thermals on them will I be able to saturate them with enough heat quick enough to...
  6. chopnhack

    Airsoft project : bb counter

    Very cool Evans! I am glad you found the LDO, I was going to recommend this one from TI TI - You may even be able to order a sample I understand why you need the other mcu's. Keep us posted, this should be awesome :)
  7. chopnhack

    555 monostable help

    Cool project! Do you have the wiring schematic of that circuit for your auto? I am curious to see if bypassing the relay (heated car seat) bypasses the thermostat that resets the relay to off... I guess it would depend on where you wire it, just curious. Some auto manufacturers integrate their...
  8. chopnhack

    Airsoft project : bb counter

    Welcome Evans, you are off to a really good start with your project! I am not sure what you meant that you couldn't find a three pin component for your voltage regulator? Three pin voltage regulators are fairly common, for 5v look for LM7805 this will give you a 5v regulated output. Do you...
  9. chopnhack

    Designing a Time Delayed Relay

    Perhaps the last layout pic we will see? I am sure it can't be soon enough for many! LOL Changes: Perforated board with vias (0.019 drill size, 0.035 via size) Moved Q2 to allow 5v trace to pass between diode and transistor Verified no clearance under 70 thou between high potential areas...
  10. chopnhack

    Anyone else waiting on Christmas?

    I don't know about you, but I got my Dr. Who fix this year - I watched all of the current Dr. Who going back to Chris Eccelston! Eagerly anticipating the Christmas special, although, the new doctor is a bit of wanker. I think the feel of this entire series was one of youthful energy and...
  11. chopnhack

    My socratic homework

    I must say that this is a very valid point being made - I am willing, however, I am still not able to figure out systems with a voltage source and a current source. Certainly not true for technical items, but most definitely more so of theoretical issues. As for the three philosophical...
  12. chopnhack

    Designing a Time Delayed Relay

    Good to know. Its probably not likely, but good practice anyway! (re: crossing of traces/potentially grounding through board) And again, I really appreciate your patience and consistent, nearly instant replies! It has made learning and actually making something so much easier. Thanks for...
  13. chopnhack

    Designing a Time Delayed Relay

    Done, I don't understand why though? Was the clearance not sufficient? I figured the distance and the board between traces should have been isolation enough. Excellent suggestion, I will add that to the silkscreen once layout is done. Thanks! :) Not completely sure - if we consider them to be...
  14. chopnhack

    Designing a Time Delayed Relay

    Correct, I saw that they pre tin the individual strands (something like 29 30ga strands) and then insulate them making them far less likely to corrode. It is probably overkill, the garage is closed most of the times, its humid, but I have learned that even if ambient humidity is high, the...
  15. chopnhack

    Designing a Time Delayed Relay

    Hey Adam! Yes, its quite relevant and helpful - thanks for digging that up! There are some traces on board that are at 0.45mm spacing, but they are very low power traces, mostly signaling to pic. And I agree, more people should be aware of the correct wire to terminate under the appropriate...
  16. chopnhack

    Designing a Time Delayed Relay

    Just realized that I didn't need to include a separate connector for the switch! I just need to wire the switch inline with phase coming into the three pin power connector! Yea, more space :) The board now measures 2.7x2.7 in - a large reduction from original size (-40%). I think its as small as...
  17. chopnhack

    PCB Design Considerations

    Some small updates to the resource. Feel free to comment with anything you find you would like to add!
  18. chopnhack

    Designing a Time Delayed Relay

    :eek:Damn, I forgot where I left off!!! I was supposed to draw up the new component! Thanks for the input and optimization, I will redo this as soon as I layout the connector.
  19. chopnhack

    Christmas mini light voltage

    Good for you Jim! The bulbs I have seen on E-bay are mostly 2.5v and some 3.5v - look up: replacement christmas light bulbs as the search phrase.
  20. chopnhack

    Dryer not spinning

    LOL, no hamsters where injured in the making of this thread! Plus one less white appliance in a landfill, what an environmentally friendly day :p:D
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