Search results

Search Forums New Posts
  1. chopnhack

    8-Pin Development Board

    Yes, free is the best! The paper is thin and slick. Not overly glossy in appearance - I put it through the printer with a standard sheet of paper as a carrier, tape across the leading edge folded over to the back of the carrier to prevent jamming. My first attempt was to run it straight through...
  2. chopnhack

    8-Pin Development Board

    Yes, this one worked really well. I happened upon a designer catalog of various furniture that was being thrown away - a little larger than 8.5x11 size so I now have literally hundreds of pages for toner transfer. The nice thing was after ironing it on, I sprayed some soapy water on it, hit it...
  3. chopnhack

    8-Pin Development Board

    Not in the existing circuit, but I do intend to use this board to power other peripheral boards - for instance, an 8x8 LED matrix, etc. I wanted to make sure I would have enough power available without frying the chip. It remains to be seen. True enough, the circuit in its existing form does not...
  4. chopnhack

    8-Pin Development Board

    It's all good - I appreciate the ideas and thoughts of others. Even if they are contrary to what I was thinking, we are not the same and thus we all have different methods, what works for you may not for others. That is how innovation is spurred on. You go Hop! What 8 pin μcu are you working...
  5. chopnhack

    8-Pin Development Board

    You are misquoting me - I didn't say it was going to have an overlay - I stated that it did. Here is what the corrected image actually looked like: Are these single turn or partial turn? True only in its existing form. I made this to be a building block - a starting point - that is why the...
  6. chopnhack

    8-Pin Development Board

    Thanks for the input Colin. The circuit does indeed look jumbled, what you see is my second draft of it, from the brain to the schematic capture software. The reason the IC is facing the wrong way is because the original had everything in a linear fashion flowing from left to right, but it...
  7. chopnhack

    how do I make pulse oximeter

    Is the purpose of the assignment to work out the solution in analog devices?
  8. chopnhack

    CircuitStudio by Altium

    Thanks for clarifying that Hop. I don't want to mislead - from my perspective, the free version of Eagle is quite capable. I would love to unload the cost of slick software, however, I am no where near the point of selling my wares, LOL. Good on you though ;-)
  9. chopnhack

    What is the diode going to?

    Thanks for confirming this Gorgon. To clarify, as shown, is the pushbutton not pulled up to Vdd via R3 and R2? From what I understood of the above schematic, MCLR stays high until pushbutton is depressed which then brings everything to ground potential. Sorry, I am still learning a lot of...
  10. chopnhack

    CircuitStudio by Altium

    I got an email from Element14 giving a free 30 day trial of CircuitStudio. Thought it was cool and wanted to share. Be warned though, the program is big bucks!! Eagle may have a steep learning curve as CircuitStudio literature points out, but the price is right :-)...
  11. chopnhack

    8-Pin Development Board

    The ground plane would have been made the same way, its just not connected. Really? Do you order any parts from China? E-Bay has many vendors that deal directly with the factories there so you can get super deals. For instance I paid $1.85 shipped for #200 3mm red LED's. There are lots of...
  12. chopnhack

    Cleaning a PCB

    Brilliant!!
  13. chopnhack

    Cleaning a PCB

    True, I wasn't thinking of motherboards - that would benefit from such a huge scrubber :oops: Point of reference I guess, I haven't produced anything over 4x4 :p I have used denatured alcohol and acid brush with metal handle as well. It works pretty well, but the hairs are a little to flexible...
  14. chopnhack

    Cleaning a PCB

    Yikes! Look at the size of this one - 2.8"x1.3" that is one large PCB. We use this for cleaning tub and showers!!
  15. chopnhack

    74HC393 Binary Counter

    Sorry about that I was posting from the mobile and its not easy to search/copy/links - or at least I haven't learned how to do so easily yet. I am glad you figured out your problem! I updated my schematic with some labels to show you where the MCLR is in the circuit. See post #15 That's good...
  16. chopnhack

    8-Pin Development Board

    Here is an updated schematic:
  17. chopnhack

    74HC393 Binary Counter

    What are you using to bring mclr high? A momentary switch? Are you buffering it with a resistor? I don't believe you can directly connect Vdd to the pin, overcurrent would occur and the μcu shuts down to prevent damage. I have a recent post that shows a schematic with circuitry for mclr pin on a...
  18. chopnhack

    8-Pin Development Board

    Its an HP laserjet - 1200 dpi. I actually didnt create a ground plane and I'm glad i didnt! I would have had more shorts to trace down!! I didnt want to have undercutting of the thin traces - so I left those large pads unetched. Less copper to remove = shorter etch time.
  19. chopnhack

    74HC393 Binary Counter

    Post the schematic - it will enable quick troubleshooting. Your question is clear, but we can't see what you are working on without it!
  20. chopnhack

    8-Pin Development Board

    Not as good as yours! But its only my second toner transfer, hopefully I can improve ;-) It's a simple circuit to help me learn how to program the PIC microcontrollers. The pic is set up to operate the 3 leds and take input from a tactile switch and pot. When I outgrow this limited hardwired...
Top