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  1. Replies
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    17,325

    I think skimask's point is the folks on this...

    I think skimask's point is the folks on this forum will help answer specific questions but can't do the work for you.

    If you want the work done for you some member are willing to do it but they...
  2. Please remember that multiple posts with the same...

    Please remember that multiple posts with the same question in multiple locations on the forum is discouraged. See the response here:
    http://www.picbasic.co.uk/forum/showthread.php?t=8431
  3. Replies
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    5,182

    I ran into this issue when I first used this...

    I ran into this issue when I first used this sensor. Make 100% sure you have the DS18B20 hooked up correctly. I wired up my first and second sensor wrong and fried both of them.
  4. Thread: Isolated FET

    by DynamoBen
    Replies
    2
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    2,811

    Bummy, I guess an opto is the only option for...

    Bummy, I guess an opto is the only option for isolation then. Thanks!
  5. Thread: Isolated FET

    by DynamoBen
    Replies
    2
    Views
    2,811

    Isolated FET

    I'm using a MOSFET for single direction motor speed control via PWM from a PIC. I'm thinking about isolating the power supply that is used for motor control (via the FET) from the supply used for the...
  6. Replies
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    18,632

    Try tying an incandescent lamp inline, this may...

    Try tying an incandescent lamp inline, this may correct this. If it does a 10 ohm 10 Watt resistor should fix it permanently.
  7. Replies
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    5,057

    The serial output/input on a pic is TTL so you...

    The serial output/input on a pic is TTL so you will have perfect communication in this type of setup. However a PC is RS-232 which is a 12V inverted communications signal. Normally you would use a...
  8. Replies
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    18,632

    Let me clear up some confusion. From your...

    Let me clear up some confusion. From your discussion it sounds like your are creating an all-in-one lighting and EFX controller.

    In the world of lighting there is a hard and fast rule that you...
  9. Replies
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    7,628

    I picked up a 1N5406 at Radio Shack last night. ...

    I picked up a 1N5406 at Radio Shack last night.




    I was unable to locate a low esr cap, so this one can't be done.



    done
  10. Replies
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    7,628

    This seems to be what you are describing. ...

    This seems to be what you are describing.

    http://www.kronosrobotics.com/an142/GAN142.htm
  11. Replies
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    7,628

    The schematic isn't correct in this case, the...

    The schematic isn't correct in this case, the diode seems to be drawn wrong. However I will try moving the diode up to the motor. I will try to located a different diode...


    The mosfet can't be...
  12. Replies
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    7,628

    After some thought I may just leave things as...

    After some thought I may just leave things as they are. To get it perfect will require a major redesign which I don't have time for. At this point I'm not sure that this will be a big deal. Agreed?
  13. Replies
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    7,628

    I tried a 2200K, no change. Here are some...

    I tried a 2200K, no change.

    Here are some scope shots of the 5V and 12V rails with the motor running.
    5V = motor controller2 sml
    12V = motor controller 12sml

    2ms/div, 1V/div (x10 probes)
  14. Replies
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    7,628

    Here is a working schematic. I'm sharing a...

    Here is a working schematic.

    I'm sharing a common between the 12V and 5V rail. I haven't looked at the 5V rail yet.
  15. Replies
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    7,628

    PWM - Mosfet/motor introducing noise

    I'm building a prop controller for Halloween. The circuit I've designed has two relays controlled via transistors and a PWM motor controller via a mosfet.

    The mosfet gate is tied to the pic via a...
  16. Replies
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    6,656

    Perfect, thanks I will file this this all my...

    Perfect, thanks I will file this this all my "good to have" docs. Hardest part is remembering that they are there. ;)
  17. Replies
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    6,656

    After digging around in my desk at work I have...

    After digging around in my desk at work I have located a 74LS165, which should do the job.
  18. Replies
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    6,656

    Sigh, let me make this more clear. I'm not...

    Sigh, let me make this more clear.

    I'm not interested in ordering one part and paying $7 shipping. I'm trying to make this work with what I have because I'm under a very short timeline. If the...
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    6,656

    Getting one shipped isn't the issue its the huge...

    Getting one shipped isn't the issue its the huge shipping charges. I could order a sample but it would be weeks before I see it.

    BTW this is a 9 position dipswitch not 8.
  20. Replies
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    6,656

    View Post

    While that’s a great idea, and one I had considered, I don't have any lying around. Makes you wish Radio Shack still carried electronic parts. :(
  21. Replies
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    6,656

    Dipswitch matrix

    A project I'm working on uses a 9 position dip switch to set the starting address. Normally I would dedicate 9 I/0 pins to it but I only have 7 available. I thought maybe I could create a 3x3 matrix...
  22. Replies
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    Normally PWM is used when you want to dim a DC...

    Normally PWM is used when you want to dim a DC load. In your case you are trying to dim an AC load, this is done very differently. In short AC dimming requires a zero cross sense, and an interrupt...
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    There is one user on the forum who has done this,...

    There is one user on the forum who has done this, see the following link:

    http://www.picbasic.co.uk/forum/showthread.php?t=6578
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    Based on what I'm reading if I line everything up...

    Based on what I'm reading if I line everything up on portb I should be able to to and turn everything on with the following code. In the end I think this may work for what I need.

    for counter...
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    That just might do it. Thanks!

    That just might do it. Thanks!
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