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  1. Hero999

    IR Thermometer

    No. A remote contains an infra-red LED not a receiver. The wavelength used for infra-red remote controls is too short for monitoring the temperature of items near room temperature. You're better off buying an IR thermometer than making one.
  2. Hero999

    0-30V Stabilized Power Supply

    Electrolytic capacitors are normally only made in E6 values, i.e. 10, 15, 22, 33 and 68 but some manufacturers only make E3 values i.e. 10, 22 and 47 which is why you're having problems finding 12,000
  3. Hero999

    0-30V Stabilized Power Supply

    1200
  4. Hero999

    Polarity Switch

    How do you know it's cheaper than what I was going to suggest? I just gave you a worst case scenario of what it might cost. Care to redeem yourself by posting a link to it?
  5. Hero999

    Making PCB's

    I think that the English spellings of some words is stupid, but if I suddenly started spelling every word phonetically, I'd get accused of being mentally challenged.
  6. Hero999

    Polarity Switch

  7. Hero999

    Making PCB's

  8. Hero999

    Making PCB's

  9. Hero999

    Making PCB's

    I don't buy any paper, I use old magazines for toner transfer, it doesn't matter whether it's printed on or not. Once you've mastered the process it's pretty reliable. Some people also have their own CNC machines. I imagine that if you have a laminator and a CNC machine then making your own...
  10. Hero999

    Making PCB's

    I haven't seen any manufacturer that can make a custom board in quantities of one or two for less than I can. You mention iron-and-peel sheets; are you aware that you don't need and special paper? Many people swear by expensive proprietary papers or particular brand of photo paper but many...
  11. Hero999

    Polarity Switch

    I'm not going to go trough all your flamebait, I'll give you one last chance. I've only made a load of assumptions in the absence of any concrete information. I still don't know what your end goal is. Why haven't you told us? Is it a secret? You'll get more help if you had just provided this...
  12. Hero999

    Brightest LEDs on the planet?

    In my opinion a Peltier cooler is not an option due to the excessive power required. Rather than a fan, is it possible to rely on the fact that the car is moving through the aire anyway? I imagine that using the car's chassis as a heatsink is probably the best option. You could probably dump...
  13. Hero999

    Polarity Switch

  14. Hero999

    Polarity Switch

    Be patient, I don't sit at the computer 24/7! If it's one of those rediculas run your car from water schemes then you've probably been told that it won't work many times before on other forums. In case you've not been told before: electrolysis can't be used for perpetual motion because, burning...
  15. Hero999

    0-30V Stabilized Power Supply

    There doesn't appear to be anything insulating the components from the heatsink which will need to be isolated from the metal chassis when it is cased unless the case is going to be non-conductive.
  16. Hero999

    Polarity Switch

    You still haven't said why. Is it a secret? There is no application I can think of. A DC motor will just vibrate and overheat. A resistive load such as a light bulb or heater will consume the same amount of power regardless of the duty cycle. It's possible you're trying to do something the...
  17. Hero999

    Making PCB's

    In my experience, toner doesn't stick to the board that well and can be easily scratched off so it needs a protective layer i.e. a conformal coating. Conformal coating is just a tough transparent lacquer which can be bought from RS Components and other similar shops...
  18. Hero999

    Polarity Switch

    So now you want to do PWM? Why didn't you say so before? What do you want this is for? If all you're looking for is a motor controller you're probably better off buying one...
  19. Hero999

    Polarity Switch

    It's the high frequency requirement that's going to make it difficult for you. What on earth do you need 15MHz for? If it's just to drive a DC motor, it's far too high.
  20. Hero999

    0-30V Stabilized Power Supply

    No offence intended but it's not very neatly assembled. If you put a bit more time into getting the PCB right you wouldn't have to solder some of those components so crookedly. If you made more of an effort to form the components properly then it would have made it easier to test and get...
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