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  1. C

    proper power supply?

    As long as the centre is negative, you could use a 9v 90000000000000000ma adapter; the circuit pulls what it needs.
  2. C

    [novice] MOSFET not turning on

    An NPN would struggle in this circuit after the voltage drop Yup switch the side of the LED, but in this instance an NPN is better than a mosfet
  3. C

    Solar powered balloon?

    Regular drone with some kind of wireless power source? (blimp it is lol)
  4. C

    Solar powered balloon?

    No luck needed, just a thought i had How about a large flat disk with some kind of antenna on top which spins round looking for a carrier frequency under it the wifi signal for the crowd while it manouvers back into place?
  5. C

    Solar powered balloon?

    I'm thinking the size of a medium sized dog, low say 10 meters high, maybe a compressed gas can can inject on mc command filling the dog sized balloon to keep it balanced then? The solar panels would just run the electronics / servos, in event of high wind it can just release the gas until it...
  6. C

    Solar powered balloon?

    The tip could be pulled into the centre producing a dish shaped feature (what's the name i'm thinking parabolic? ) and coated with something to grab the transmitted waves? I don't know how it would top itself up with hydrogen though, making it is easy enough though it could fly and hover and...
  7. C

    Awww google pranked me!

    The only one of the day to get me :|
  8. C

    Lemon Fire Starter BS

    I call BS/HS/DS on this! Looking closely there's something behind the pot the wires from the real battery wires are through a drilled hole in the pot and covered up by dirt.. Videos like these need banning from youtube... And survival ??? Yeah when in the woods i come across coper and iron...
  9. C

    Running 3v and 9v at same time from 6 batteries

    Even with a flyback diode?
  10. C

    Laser driver to diode resistance.

    The ir diode could not care about frequency really only current, for example if it was on for 1ms off for 1ms in theory can drive it harder than it's rated current, pwm is merely a way of driving the diode To test it you could stick resistor on the end of the driver, but as long as the driver...
  11. C

    Laser driver to diode resistance.

    Notice how the voltage stays pretty constant? This is a poor mans way of a voltage regulator using an LED, the voltage is passed to a transistor and then regulates a component which requires that level of voltage
  12. C

    Laser driver to diode resistance.

    Diodes work on current, it should not providing max current (650ma?) Is not reached, when the driver limits the current the voltage will drop to around the foward voltage it's supposed be, if current rises then the voltage across the diode will rise as well Take a normal LED and stick a 300ohm...
  13. C

    Running 3v and 9v at same time from 6 batteries

    Wow, um why like this? I'd just use 1 voltage then split them via a regulator to power individual components, or what will happen is that you'll end up with unequal charged/uncharged cells... sounds like a headache to keep running
  14. C

    Laser driver to diode resistance.

    But it sounds like you already have a driver?
  15. C

    Laser driver to diode resistance.

    Cc of 8ma is not 0.8amps :o 2.2v 600ma sounds like what it is rated, 3-2.2/ 0.6 0.6ohm resistor to drive it at max current using (at a push) a 1/2w resistor but i'd use a 1w If you do, be careful 1 splash of IR could do serious damage to eyes
  16. C

    Solar powered balloon?

    Had a thought, would it be possible to use solar power on top of a hydrogen filled balloon?, with a couple of motors that can push it in a direction of choice... But, the catch is, the circuitry would have a way of converting say 100ml of onboard water into hydrogen to keep the balloon up and...
  17. C

    Implantiduino

    http://littlebirdelectronics.com.au/pages/introducing-implantuino Really lol I think it might be april the first lol
  18. C

    Joule Thief Wiring

    So you think it will work, i wired up 2 samm inductors that that look like resistors but after a chicken curry... Failed But i have smd 10uh and 100uh on the way to find out ... thanks!
  19. C

    TV interference from LED lamps

    Easier to use another power supply...
  20. C

    Harvesting parts from a car

    Windscreen washer pump, fuses/relays
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