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  1. BobK

    mplab libaray

    From a previous project, or find the code online. Bob
  2. BobK

    long wire to transistor base

    Actually I would expect to see a nice 60Hz signal at the output when the 6 foot wire is connected, but certainly not turning the transistor off. Bob
  3. BobK

    mplab libaray

    Actually I have never created a library myself in MPLAB. I generally copy source code and modify it for the next project. Bob
  4. BobK

    Looking for resistor value and capacitor value for passive low pass filter remove RF

    Yep. If you are going to destroy, destroy cheap! Bob
  5. BobK

    10 amp NPN Transistor switch circuit

    Steve, That is interesting. I thought the switching problems only showed up at high frequencies, no? Bob
  6. BobK

    mplab libaray

    Have you tried the help in MPLAB? Bob
  7. BobK

    Patents / Freedom

    Yep, like a rectangular shpaed phone with rounded corners. That is so non-obvious. What a genius it took to come up with that! bob
  8. BobK

    48 LED 12v panel, need to dim it a bit would a resistor work?

    It probably already has a resistor, so adding more resistance would be fine. If you can find out what it has now, that would give you a good idea of what to add, probably something like 1/4 to 1 times what is already there. Bob
  9. BobK

    5 Digit Digital stop watch using a MC14553b and TIL 311

    I think the '555 is his clock. Bob
  10. BobK

    Graphene based Supercapacitors

    Here is an article and chart showing energy densities for various battery types. http://batteryuniversity.com/learn/article/whats_the_best_battery Bob
  11. BobK

    hum suppressor guitar pedal -- scam or legit

    The circuit you show is just to clean up a bad power supply. The device you show is likely a 60Hz notch filter. Bob
  12. BobK

    Non invasively monitor AC backup generator power.

    You can get the oscilloscope software as freeware I believe. Bob
  13. BobK

    Looking for resistor value and capacitor value for passive low pass filter remove RF

    Nerves DO operatate electrically, but not by charge flowing along a conductor. They operate by ions moving through the membrane of the nerve fiber. The propagation is more like a sound wave in that what is propagating is a change in physical characteristic (ion permeability) along the fiber...
  14. BobK

    10 amp NPN Transistor switch circuit

    And you can easily find MOSFETs with Rdson of more like 10mOhms, which would lower the power to well under 1 Watt and not need any heat sink. Bob
  15. BobK

    220V voltage to digital voltage

    How much current does your combined circuit need? To up the current you will have to raise the value of the capacitor and possibly raise the power handling capability of the zener. Bob
  16. BobK

    Modifying a 5-switch sound board

    Actually, a randomizer is no more difficult than a sequencer. You just clock the sequencer clock continuously and when the button is pressed, whichever output is active at that time is selected. Edited: You would need a 4017 and a 555 as a clock. The 4017 can cycle through 5 outputs...
  17. BobK

    Graphene based Supercapacitors

    I don't find that vague at all. It is saying that researchers (not commercial products) have built supercaps that can store as much energy per gram as NiMH batteries. Which is quite an acommplishment. The Tesla, on the other hand uses Lithium Ion batteries which store about 50% more than...
  18. BobK

    5 Digit Digital stop watch using a MC14553b and TIL 311

    Then you are not going to make a stopwatch with 0.01 second accuracy, and it would be a stretch to make 1 second accuracy over 10 minutes. Bob
  19. BobK

    220V voltage to digital voltage

    I think you are right duke, the zener itself would conduct in the opposite direction. I guess I was thinking about a different circuit for off-line transformerless supplies, which did have two diodes. Bob
  20. BobK

    Bottleneck 555's 0.2A Stuck project

    Whoops, I did not see the thickness of the lines, only the color. So ignore my comments about the other wires needing to be red. Bob
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