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  1. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    I'm really confused with all this. If I will be using the same PIC as you and using the same schematic as you, why do I need to change anything in the software to get it to work?
  2. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    Adam, I am using this driver, with the guppydrv firmware. The driver is driving these LED's in parallel. LED's will be driven with 10 watts on high. Serious heat sinking required
  3. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    Sorry, have been very busy lately. I didn't know that you had a finished version that stays alive through only the 330r resistor. If you are happy with it, give me the part numbers of the components you are using. I will get them ordered and cut a proto board. Also, can you email me the software?
  4. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    That looks more familiar. :) Everything looks great. The only thing I would like to see is wider traces going to the source and drain. Do you think 1 via is enough to handle 5 amps?
  5. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    Please help clarify... 1) I assume this is a MOSFET that is in a different case than the one I chose. If so, can you link to a datasheet? It seems odd to me that they would dedicate only 1 pin to the source and 4 to the drain. 2) Not sure what this is. Maybe a pullup/down resistor? 3)...
  6. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    Wow!. Looks amazing. Trying to visualize component placement.
  7. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    The PCB fits inside of a titanium housing that is threaded on the inside and the outside. The housing has to be small enough to fit in AA size flashlights. The other side of the PCB will have a spring soldered to it that will be the (-) battery contact. Vias will connect this to the component...
  8. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    And I completely agree, that huge diode has to go!
  9. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    Due to the design of the switch housing and actuating button, the switch must be in the center. Also, the switch must have an actuation force of at least 400 grams. I purchased the smallest switch I could find meeting this requirement. It's dimensions are below. Also, all components must be on...
  10. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    This goes WAY back to post #1. 14mm round.
  11. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    I just wanted to jump in and say thank you for everyone's continued hard work. At this point, it is difficult for me absorb everything that is going on, though I will continue trying. I won't even attempt to contribute anything right now, as it would just make me look like a babbling idiot...
  12. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    The battery being used will be 4.2v fresh off the charger and 2.8v exhausted. I can't help with the PIC.
  13. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    Actually it isn't a new. It is just buried very early in the thread, In post #47, I gave a link to the driver which explains the operation and gives instructions for changing modes and programming the turbo timer. You wouldn't have caught it unless you were closely following from the start. I...
  14. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    I don't know the exact minimum off duration required to perform a mode change, but I'm pretty sure it's in the range of 500ms also. One ms would be invisible to the driver.
  15. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    The quick press of the switch is used for mode changing of the LED driver. The switch would need to be able to be repeatedly pressed for less than 500ms up to 30 times.
  16. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    The high activation force is needed to give the operator feedback, even if they are wearing gloves. Yes, it’s quite huge. Yes. Tiny little sucker. I had fun soldering that one. I put the 220 ohm resistor there, as I didn’t have a 330 here. If you have a 330 there, please substitute. It sounds...
  17. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    The PIC on the board I sent you contains the program that Adam wrote. I obviously screwed something up when I edited it to use to GPIO 2 instead of GPIO 0 as the output. You can just throw 4 volts on the board and monitor the output across the resistor. The switch has a pretty high activation...
  18. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    That sounds like good news. I'm not familiar with how the micro's operate, so here's a stupid question. Can the PIC sleep while it is cycling the MOSFET off every 100ms? That would appear to be running to me, not sleeping.
  19. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    We have plenty of room to increase capacitor value. Very little wiggle room to decrease resistor value, as it cuts into the run time.
  20. TenderTendon

    Microcontroller controlled by pushbutton for LED flashlight

    Yes, but the original plan was to pulse the MOSFET OFF for 1ms every 100ms, to keep the capacitor charged. We do not know yet if this will work. Here is a quote from Kris explaining the theory: "So here's my suggestion. Use 1 µF for the reservoir capacitor on your switch board, and use 330Ω...
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