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  1. C

    Joule Thief Wiring

    I can't imagine this working, it's not joined like a traditional joule thief so how's it working (the torroidless version on the right)
  2. C

    TV interference from LED lamps

    Long term solution might be a snubber type circuit, i rarely venture into AC territory :)
  3. C

    TV interference from LED lamps

    Maybe the step down inverter is causing the interference due to a lighter load? Attach 1 old halogen bulb in with the LED bulbs see if that helps reduce interference due to a heavier load
  4. C

    Opamp vs Comparator

    Dorke, yup thanks for tip all is good though as is...
  5. C

    Opamp vs Comparator

    Schematic? What's a comparator that sources instead of sinks got to do with a schematic? (Not needed) The pull up i used on the pnp to keep it at 5v from the opamp, not that i had an issue with the circuit, but a pull up helps the snap on/off side of things...
  6. C

    IR Switch Trigger in Specific Setup

    10 - 50w is a lot, i mean a LOT, 10w is about as much light as you need before you start blinding people.. If you can find out how much current draw will be, you can pick a mosfet best suited for the job, a 50amp mosfet might be over kill if all you need is 1amp at 12v (10w) So yeah, arduino...
  7. C

    Opamp vs Comparator

    Good idea, i'll use that for this circuit, thanks!
  8. C

    IR Switch Trigger in Specific Setup

    The problem with pir/infra red is that 1. It will trigger when it senses motion not really distance there is an adjust but even low it might be too sensitive as it has a wide view field (so neighbors might trigger it) 2. Regardless of how close you are it will turn off until you move again...
  9. C

    PLEASE HELP ID THIS!!

    P.s that spring could be an attena :o
  10. C

    PLEASE HELP ID THIS!!

    Well, that speaker could be a microphone, it's odd I suggest pulling the batteries out and sticking it back under the bed! :)
  11. C

    Opamp vs Comparator

    I just built mysf a little charger circuit for a super cap, even a 2w 22ohm resistor is getting hot delivering under 300ma (taking forever for a 400f cap lol) but, the question is.. i used a comparator vs an opamp, and when the voltage is reached the output pin drops to gnd voltage, most opamps...
  12. C

    PLEASE HELP ID THIS!!

    I'm suspicious of this device lol
  13. C

    PLEASE HELP ID THIS!!

    I'm 80% sure it's a toy and when the spring hits a metal contact it makes noise... 20% thinks it's made to look like a toy and it's a voice transmitter / spy bug! Have you got a jealous bf/husband? :P
  14. C

    simple Calculator

    It's called a microcontroller, ironically that's essentially what the first computer (modern definition) was used for
  15. C

    Question about Li-ion batteries

    Although in my defense lol ...... if you're traveling 80mph, are you not traveling at 80mph if you only have enough fuel for a mile? :)
  16. C

    Question about Li-ion batteries

    Fair enough; i'll drop the h :)
  17. C

    I want to replace a noisy capacitor in a TV

    It's odd a resistor would make noise, usually an inductor would You able to measure the resistance value with a multimeter?
  18. C

    Question about Li-ion batteries

    Look you're confusing capacity with current draw Capacity, 9000mah from a cheap lithium is bs from ebay, it's more like 800 - 1200mah capacity Brief moments of current draw can be 20Ah but it will only supply that for a few seconds maybe a minute It sounds like you're confusing current draw...
  19. C

    Question about Li-ion batteries

    What? Where did i say 9/ 100Ah is bs? A good 18650 battery will pull up to 100Ah (i never said it will give 100Ah for 1 hour, it will pull that much for a brief moment, a few seconds/minute? I never actually tested for that) Not sure what you think i said....
  20. C

    Question about Li-ion batteries

    Amp hours
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