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  1. KrisBlueNZ

    10 bit Parallel-in Serial-out Shift Register

    Think about Steve's question.
  2. KrisBlueNZ

    Microcontroller controlled by pushbutton for LED flashlight

    I've seen many reports of problems with clone PICkits. But then again, you only hear from the guys who have problems, not the ones who have good experiences, and I've also seen complaints about problems the genuine PICkit 3. But if you've bought it from Microchip, you have some recourse if you...
  3. KrisBlueNZ

    cap specification

    Hi there and welcome to Electronics Point :-) The capacitor is probably just to reject very low frequencies such as rumble. The value of "0.047 Mfd" means 0.047 µF (microfarads) which is also equivalent to 47 nF (nanofarads). Voltage is not an issue for this application, but the type of...
  4. KrisBlueNZ

    Microcontroller controlled by pushbutton for LED flashlight

    I ordered my PICkit 3 direct from Microchip.
  5. KrisBlueNZ

    Microcontroller controlled by pushbutton for LED flashlight

    Good luck with that. I'm not sure what the rules are these days. I think counterfeit is the wrong word. A counterfeit is supposed to be undetectable through normal examination. Although that unit looks almost identical to a genuine Microchip PICkit 3, and has the same name (which is a Microchip...
  6. KrisBlueNZ

    Microcontroller controlled by pushbutton for LED flashlight

    Yeah, chopnhack is right that the one you ordered is a counterfeit. It's best to order direct from Microchip. It might cost a bit more, but it's a lot more likely to work, and if it doesn't, you have some kind of recourse. I strongly recommend providing in-circuit programming using...
  7. KrisBlueNZ

    countdown timer

    Very cool! Nice work :-)
  8. KrisBlueNZ

    Microcontroller controlled by pushbutton for LED flashlight

    Right, that adapter isn't suitable - you would have to solder the device into the adapter, program it, desolder it, and solder it into your board. Micros are normally programmed in-circuit and Microchip have lots of documentation for how a programming header can be added as part of the design...
  9. KrisBlueNZ

    Stage Line 500W amp repair project

    OK. Most of those voltages are kind of correct for the left channel, but there's not enough bias for the output transistors. Here's the schematic for the left channel. Each diagonal red line indicates the base-emitter junction of a transistor. When you measure between the base and emitter of...
  10. KrisBlueNZ

    Constant current Source clarification

    Good. You know you need to check the guaranteed worst case specifications of the components you use, right? Confirming proper operation with a simulation, or with the particular BSS84 you have in your breadboard, doesn't guarantee it will always work, and if it won't always work, it is not...
  11. KrisBlueNZ

    [woo] Creating high voltage, high current from HV/LC and LV/HC inputs

    That's a good analogy! I suspect Mr. Combatti has disappeared forever in search of a site where the members are less educated and more credulous... I mean, more receptive and open-minded :-) Time to close this thread
  12. KrisBlueNZ

    IRF640 vs IRF640N

    Thanks Steve :-)
  13. KrisBlueNZ

    [woo] Creating high voltage, high current from HV/LC and LV/HC inputs

    I do have something to contribute. I'm telling you to clarify your claims if you want to be taken seriously. We have no patience for vague pseudoscientific claims here. There are forums that deal with that kind of junk science though.
  14. KrisBlueNZ

    [woo] Creating high voltage, high current from HV/LC and LV/HC inputs

    No, that's impossible. You can't trick the laws of physics! You can often trick people with inadequate understanding of science into "investing" in experiments into the laughably named "over-unity" pursuits, or "buying the plans" for a device that's supposed to do this, but reality is the real...
  15. KrisBlueNZ

    Microcontroller controlled by pushbutton for LED flashlight

    Both are normally programmed in C or assembly language. Microchip's free programming environment for the PIC includes a C compiler and an assembler. I think Atmel's equivalent does too. They are very resource-constrained devices and the C language implementations have a number of limitations...
  16. KrisBlueNZ

    Toshiba 32BV701B audio fault

    OK, what are the markings on the IC just below the SCART connector? It looks like the circuit reference is U158.
  17. KrisBlueNZ

    Need help on identifying a part

    Can you post a clear, in-focus picture?
  18. KrisBlueNZ

    countdown timer

    No problem :-) When you build it, try adding that diode back in. I can't see why it wouldn't work in the simulation and I would like to know whether it works in the real world.
  19. KrisBlueNZ

    Homemade starter relay sticks

    Starter motors pull hundreds of amps I believe, and they're inductive. A normal relay won't cut it. You need something called a contactor, I think, which is just a big relay with contacts that are strongly forced together and pulled apart. That's all I know (or think I know), sorry. Other...
  20. KrisBlueNZ

    Stage Line 500W amp repair project

    Right. OK, so the fault LEDs are all OK now? Can you go back to post #112 and make those measurements again, and repeat them for the other channel too.
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