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jwin

Member Since: June 7, 2007

Country: United States

  • Can anyone recommend where to get a 11-18V power supply for this?
    All I can find laying around is a 12 2.0A adapter and current range goes up to 6.0A. Will the 2.0A work?

  • total newb question - Could I drive 10 of these from an arduino pro using an external power supply (li-ion battery)?
    Here’s what I"m thinking:
    I see that the datasheet says it maxes out around 150mA. I know that the arduino maxes out at about 40mA per pin so I’m assuming I’d need an external power supply.
    Could I use a lithium ion battery http://www.sparkfun.com/products/10500 and a 5V voltage regulator and hook up the positive terminal of the battery to the voltage (VCC) pin on these boards? How many amps (mA) can the li-ion battery supply? I know how to create a voltage regulator from this tutorial: http://www.sparkfun.com/tutorials/57
    What is the best way to run these and the arduino pro at the same time with as light a battery as possible?
    I am planning to attach these to a kite.
    Thanks!

  • I am pretty sure the IO pins on the Arduion output at 40mA per pin actually. http://arduino.cc/en/Main/ArduinoBoardDuemilanove
    From the above link:
    They operate at 5 volts. Each pin can provide or receive a maximum of 40 mA and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms.
    These work off of 5V no problem from my experience and I have them setup and working on my Arduino. I built a few of the boards detailed on your Controllable power outlet tutorial here (http://www.sparkfun.com/commerce/tutorial_info.php?tutorials_id=119)
    I’ve looked at the datasheet and I’m confused by the coil data tables. The arduino can switch a few of these no problem. I’m wondering if it can switch 8 or more?

  • Looking at the spec sheet I can’t find how much power this draws. I’m trying to figure out how many of these I could turn on at once from the Arduino.

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