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  1. CDRIVE

    Anyone made a sound card oscilloscope?

    I'm glad you're enjoying your journey but I'm clueless as to what ILED is. Chris
  2. CDRIVE

    Hall effect sensor help

    What schematic? I watched the vid but I don't remember seeing any schematic. Chris
  3. CDRIVE

    Anyone made a sound card oscilloscope?

    Make a mental note of the day you found EP. Consider it to be most fortuitous. We have quite a cadre of very knowledgeable, helpful and friendly members. It's sad that you will never know our most shining star (Kris Blue) who was taken from us way to early in life. He had the patience of a Saint...
  4. CDRIVE

    Anyone made a sound card oscilloscope?

    Robert, I've never seen it described quite like that but yeah you're spot on! Good job! Chris
  5. CDRIVE

    Anyone made a sound card oscilloscope?

    Adam, I wouldn't loose sleep over it. He who never errs most assuredly never commits to anything. :p Chris
  6. CDRIVE

    Anyone made a sound card oscilloscope?

    Adam, I don't think that's going to help. The DC blocking cap in the PC is still a major (LF) limiting factor. After all, you can't increase capacitance by adding a cap in series with another cap. It does the inverse and reduces the total capacitance. EG two 1uF caps in series = .5uF. ;) Chris
  7. CDRIVE

    Hall effect sensor help

    The author did a stellar job there but I'm lost over his copper vs aluminum wire comment. Regarding rotation direction: Listen to what the author said about the slight mechanical offset he accidentally built into his design. He states that it turned out to his advantage, as it enables the...
  8. CDRIVE

    Replacing a 9Vdc relay with a transistor switch

    Here are some SSR's http://www.mpja.com/Solid-State-Relays/products/133/ Chris
  9. CDRIVE

    Replacing a 9Vdc relay with a transistor switch

    You're correct in assuming that this is not what you want. I think the SSR that Alec mentioned is the rout you should be taking. Chris
  10. CDRIVE

    Anyone made a sound card oscilloscope?

    Robert, take a look at the spice simulation I provided for you. It's comprised of a square wave signal source and an RC coupling network that will look much like the coupling network (but not exactly) on the MIC input circuit of your PC. The first plot is generated using a 1Hz square wave, 0...
  11. CDRIVE

    Anyone made a sound card oscilloscope?

    Exactly Adam. Looking at the scope trace it appears his Aduino freq is 1Hz. This freq is far too low to faithfully AC couple a square wave signal to the sound card. It might be prudent to explain the limitations of a Sound Card Scope because they are many. This is an entry level (home...
  12. CDRIVE

    rewire vsr drill for home project

    The forward/reverse switch is most likely a DPDT (Double Pole Double Throw) switch. Also less commonly known (in the US) as a Changeover Switch. The speed control is simply a Potentiometer but the slider type instead of the round (turn knob) type your familiar with. Since you said the drill...
  13. CDRIVE

    need a switch that will deactivate with man overboard

    My guess is that you meant to say "Some reasonable distance from the throttle". I'm not sure if that's a good idea either but In any case we had good fun! :p BTW: You can ask anyone here on EP and they will assure you that I NEVER make missteaks!! ... EVER!!!! :D Chris
  14. CDRIVE

    need a switch that will deactivate with man overboard

    Well, "unreasonable distance from the boat" implies the pilot is not on board. If the pilot is not on board then any distance is unreasonable. Or is hanging off the gunnels OK? After all, he's not that far from being on board. :D Here's hoping you take this with the humor that was intended. I...
  15. CDRIVE

    need a switch that will deactivate with man overboard

    Actually, if one dissects parts this post it's quite funny. I like the bold sentence the best! o_O Chris
  16. CDRIVE

    biasing this op amp

    The TLC2274 has the same max Vdd of +8V. Take a look at the TS942. It's single supply with a Vdd max of +12V. Chris
  17. CDRIVE

    need a switch that will deactivate with man overboard

    Uh, yeah. That makes more sense. Chris
  18. CDRIVE

    need a switch that will deactivate with man overboard

    I bought this Electronic Bike Horn for my bike. While I don't consider the horn itself to be water proof the horn's thumb switch is. You can see the details of the thumb switch in the photos. It's completely molded in rubber on the end of the coiled cable. It would probably mount to your...
  19. CDRIVE

    Protection diode melted and burnt

    Guys, I want to thank you all for your input on this. I guess the guesses will have to suffice. Actually, since we're a scientific forum I think that I should restate that as an educated hypothesis. :) Dave, I'm very sorry to hear that. I hate being bugged when I'm ill. Get well soon. Chris
  20. CDRIVE

    Protection diode melted and burnt

    Thanks but still not clear how "E" equates to "R". Chris
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