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  1. chopnhack

    My Wearable Device

    Outstanding Bob! Really well done, have you considered sending if off to China to make batches and selling them for the holiday? The lighting arrangement was cleverly done. Do you have a switch or did you program it to randomly rotate through the scenes?
  2. chopnhack

    PIC16F1824 Development Board

    Looks good Xeno. When you mean development board, I take it that the board is used for chips that have already been programmed, is that correct? How are you programming them currently? I too have used the toner transfer method with variable success. As long as the trace width required doesn't...
  3. Jack-o-Lantern

    Jack-o-Lantern

    A quick lighting of our jack o lantern this year, courtesy of 9 leds :) I used three leds in series together with a resistor. I repeated this 3x to have three separate strands powered in parallel from a 9v battery. I included a switch to make it easy for the family to turn it on/off. In each...
  4. chopnhack

    Jack-o-Lantern

    chopnhack submitted a new Showcase Item: Jack-o-Lantern Read more about this showcase item here...
  5. chopnhack

    Fanrunon - delayed turn-off for bathroom extractor fan

    Well, if we are going to post commercial made items, then I would go with: Leviton I have used other products made by them and have always found them to be of great quality. They even make mechanical versions still in case you are concerned with high humidity levels in the washroom.
  6. chopnhack

    Fanrunon - delayed turn-off for bathroom extractor fan

    goto $ ; Croak - go gaga - loop forever LOL Don't forget to include: fetch current time if time == 0300 then goto $ //loop forever at 3AM :-P else return 0;
  7. chopnhack

    AC power generation and transformers

    Do they discharge through a large load resistor before grounding? @KrisBlueNZ - reminds me of the bomb squad technician ;-)
  8. chopnhack

    Project Logs

    Its a good point, but it will be incumbent on the poster to go back and prune. The nature of the project type post is iterative and therefore will seem like a blog until perhaps the endpoint is reached. That could be quite a lot of cleaning. I know of a certain post :oops: that has over 200...
  9. chopnhack

    Project Logs

    I like 4 best as it would be the easiest to follow from the viewers perspective, but I appreciate how time consuming it could be to implement. As others have echoed, is it justifiable considering the number of projects we see? This appears to be a persistent problem and 4 seems like the best...
  10. chopnhack

    Transformer? Choke? What?

    Could it just be a specialty product made for the appliance? It looks like its just two shell type transformers sharing a common wall for weight and space savings.
  11. chopnhack

    Calculating voltages help

    @Laplace - That was clever!! - shall we call it commutative property of voltage in parallel :-) Sam, I am still struggling with the math, much to everyone's chagrin around here, but this site might help you understand the calculations behind this circuit.
  12. chopnhack

    Errors with Eagle CAD

    The drill size can be a common error and easily fixed. Look in your DRC - you will see preset sizes based on either an Eagle preset or if you have loaded a board house's requirements, then their presets. Look at the "size" tab under DRC, the icon is right below the autorouter on the tool tab...
  13. chopnhack

    Circuit A Day?

    Our Apologies as ElectronicsTheory.Com was hacked, and we are in the process of reconstructing it. This will take a little time, but rest assured, all yo>> Wow, scary eh?! As Adam has said, you can buy tons of parts cheap directly from the source - factories in China. There is a good post...
  14. chopnhack

    Timer with piezo

    You might want to update your profile to include whereabouts you live - for mains frequency and references to where you can purchase the parts. I found the 74C926 but as Adam mentioned, the cost is kinda prohibitive and a PIC would be much cheaper if you are able to program it, etc. The part...
  15. chopnhack

    Rain Sensor Status

    Oh, LOL :D:D Thanks Kris!! Someone needs to fix the like button.... it only works once on this thread! What gives!!! LOL That clip is hysterical :-) I will get it, I already get some parts... I just need to break myself of some old ways of thinking of these things from my tinkering days. I am...
  16. chopnhack

    Rain Sensor Status

    Thanks guys, I appreciate your help an encouragement! And I will certainly keep on trucking :-)
  17. chopnhack

    Rain Sensor Status

    LOL, immeasurably! I think I got it. I was thinking at one point that neutral was PROVIDING the opposite phase... So, if I understand correctly your excellently detailed post - voltage is measured between points (i thought I understood that from earlier posts), current flows between these points...
  18. chopnhack

    Rain Sensor Status

    Thanks again Kris :-) Would you be able to draw some arrows on post #125 when you have time to help me visualize current flow during the cycles of the mains? If you can, it would be greatly appreciated. The sensor is working well! I was quite surprised by the dry out time - it was quite short...
  19. chopnhack

    Capacitive Reactance Circuit

    Thanks guys, you are a great lot! Kris, I highly recommend the open back trucker cap, there is a lot less material to digest - don't ask me how I know ;-) In my brief web crawl on smps I came across this chip which was pretty neat. It made me chuckle when I came across this line: "Fewer than...
  20. chopnhack

    Capacitive Reactance Circuit

    I stand corrected! In the fourth picture of the link you posted, there is a 4 legged surface mount component that probably is a SMPS. I guess I overlooked the economy of scales that are being leveraged by these companies proximity to the factories of these components.
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