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  1. chopnhack

    Designing a Time Delayed Relay

    Kris, how do you post your code snippet complete with its own dialog box, like in your fan run on project? I had to reformat for space in my previous post and it still didn't come out correctly. Thanks!
  2. chopnhack

    Help/suggestion soldering flex cable

    I edited my previous post, click on "reflow". There is an inexpensive solder paste that has microscopic spheres of solder in a flux paste, you apply it to the areas to be soldered and then "bake". The author of that video went so far as to have a computer controlled heating sequence (presumably...
  3. chopnhack

    Designing a Time Delayed Relay

    Black magic :D Cool, some confusion dispelled :). It's hard writing a spec when you don't know what your talking about!! :D:eek::D:D
  4. chopnhack

    Help/suggestion soldering flex cable

    Hand soldering will most likely melt the cable assembly. Do you have the ability to use an oven to low heat solder like they do for smt components? I will try to find a video to explain this better. Most tips of soldering irons are 550-700+ deg F. Reflow.
  5. chopnhack

    Designing a Time Delayed Relay

    Ok, so the onboard oscillator is some type of algorithm run by the software that determines time? No, I don't want to complicate matters!! Hahaha, I just thought I remember somewhere in this post that mains frequency was being used for time keeping. Its probably my misunderstanding of what we...
  6. chopnhack

    Designing a Time Delayed Relay

    Oh? I was under the impression from earlier in the thread that the mains was being used for timekeeping, I just didn't understand how. So the on board crystal will be used for timekeeping and the mains cycle for the program to compare and correct against? Aren't the oscillations of the crystal...
  7. chopnhack

    Designing a Time Delayed Relay

    In further writing of the specs, I tried to figure out clock usage of the PIC. It should be rather simple, but I haven't found any examples on the web that explicitly explain it.... If I use mains frequency as my oscillator - in this case it would be on pin 2, OSC1, would another pin now have to...
  8. chopnhack

    PIC emulator software

    A graphical app would make it easier for novices like me to understand quickly what is going on. I'm a visual learner ;-)
  9. chopnhack

    Wanted: TE connectivity 90273-5 hand crimp tool

    :( I am sorry Almut, that's a tough spot. The tool you are looking for is used for flat ribbon cable assemblies and like you said - pricey!! Have you tried TE's online chat? You could ask them if they make an alternate tool for crimping. http://www.te.com/support-center/ Good luck!
  10. chopnhack

    Designing a Time Delayed Relay

    Thanks Kris, I needed to get the ball rolling and I started with what I knew ;)
  11. chopnhack

    Designing a Time Delayed Relay

    Ok, some preliminary stuff: /* * Dust Collector Delay Circuit * Chopnhack * 2015 * * Purpose: This circuit has been designed to automatically turn on a dust collector when another tool is running. The criteria for turning on the DC (dust collector) * will be at least 5 amps at...
  12. chopnhack

    Capacitors

    @Jeanguypataterubberboot Nice setup by the way!! And you said you were new in electronics :eek: If you look up reactance it may help you understand AC in a capacitor, very interesting stuff.
  13. chopnhack

    Capacitors

    The article mentions how "electrostatic fields are electric fields that do not change with time" - I didn't understand how that statement could stand when we have AC across/through (whatever we are using) a capacitor where the field is indeed changing and doing so frequently. It makes perfect...
  14. chopnhack

    Capacitors

    Excellent Ratch! That other guy was quite animated.... imagine that electrons going down wires, LOL I found the section in bold interesting (from http://en.wikipedia.org/wiki/Electric_field#Electric_potential ) Care to comment how that applies to capacitors with DC/AC power? Electrostatic...
  15. chopnhack

    Capacitors

    If "energy" is passing through the dielectric, but its not an electron, what is it? A dielectric is an insulator that can be polarized, right? So then the charge on the other plate is "induced" is it by an electromagnetic field?
  16. chopnhack

    Capacitors

    Yes, I didn't watch it all because I remember that a capacitor is two plates separated by an insulating dielectric material. Therefore direct current can not pass, but alternating current can "induce" a current on the far plate since it is time varying.
  17. chopnhack

    Exercise Bike "approving" power to TV???

    LOL Ah, yes good point, you are looking at the "edges", not just a simple on/off. I guess then the OP could even create a point system for how fast he was pedaling - i.e. if the edges were coming in faster they might be worth more time as he exerted himself more! :D
  18. chopnhack

    Exercise Bike "approving" power to TV???

    Outstanding @Gryd3 :D You might want to consider mechanically transferring the spin from the bike to that locked box as well - there could be a potential for someone to just shine a flash light at the sensor :eek:
  19. chopnhack

    Capacitors

    Displacement current flows, but there is no direct current flow across the capacitor. In other words the electrons you put in on one plate of the capacitor will not be the same electrons that flow from the other plate. Dave over at EEVblog recently went on a tirade about flow across a capacitor.
  20. chopnhack

    Can someone check this layout to see if its correct plz???

    Welcome aboard Mikael! Cool project, glad you were able to make something you can use in your shop!! So there are two problems: The LCD has power, but no letters appear or ?? And the buzzer sounds off after a minute without getting the signal from the PIC. Not sure about the LCD, but did you...
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