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Recent content by Crogdor

  1. C

    Regulate from 12v to 3v?

    I'm working on a little project to wire up my garage door remote to trigger when I flash the high beams on my motorcycle. My garage door remote is a small fob containing a 3v coin battery (DL2023) and a single button. I've bridged the connections of the button, so it's always on now. The...
  2. C

    Grounding Question

    Hi, I have a newbie question about grounding. I bought a 5M LED strip that uses WS2812b drivers to control the LEDs. It's for use with an Arduino UNO controller. The strip uses a 3 wire setup: VCC, GND, and Data. If I connect VCC and GND to the power supply, and Data to the Arduino...
  3. C

    Can someone help me understand parallel current draw?

    Awesome, thanks for that link! Now it makes a lot more sense. I've wired it up with a series resistor in front of each LED, and connected each pair of components in parallel. Now I'm seeing the numbers I expected. Thanks!
  4. C

    Can someone help me understand parallel current draw?

    Noob here. I'm trying to understand what's going on in these circuits, which I've drawn up to represent real-world circuits I've created: http://i.imgur.com/ZyyVPHO.png I have a 130R resistor wired to an LED. The ammeter shows 22.55mA. When I add a second LED in parallel, it goes to...
  5. C

    Is a voltage regulator always required?

    Thanks for the replies!
  6. C

    Is a voltage regulator always required?

    I'm wiring up an ATMEGA328P-PU to a breadboard. I've got a 5V 20A regulated switching power supply to provide power. Is there any argument for wanting a voltage regulator, as the supply is already regulated at 5V? I ask because looking at the circuit diagrams for this chip shows that...
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    Trying to make analogue sound to lcd?

    I understand the quote referred to human flight. My point was that if an expert says 'heavier than air flight cannot be achieved', then they're ignoring the logical conclusion that given the physically possibility of heavier-than-air flight in birds, then it is at least conceivable that humans...
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    Trying to make analogue sound to lcd?

    Pseudo-sciences like EVP, homeopathy, astrology, etc., aren't being dismissed out of hand, they're being dismissed because the evidence isn't there, even though people have looked for it. It's great that Edison looked into it - it wasn't obviously bogus at that time. But now we're here over 80...
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    How can I read and forward HDMI visual data?

    Recently, I built an Ambilight clone using an Arduino UNO, by following the Adalight tutorial from Adafruit.com. My friends love it, and a few have asked me to make them one. They don't have home theater PCs though. So, I had this idea that maybe I could build a device that has an HDMI input...
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