http://forums.leaflabs.com/topic.php?id=540 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:18:34 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=540#post-2847 Fri, 26 Nov 2010 19:32:58 +0000 Silntknight 2847@http://forums.leaflabs.com/ <p>The current is less than 25mA. I have a 150 ohm resistor in series. </p> http://forums.leaflabs.com/topic.php?id=540#post-2841 Fri, 26 Nov 2010 18:59:04 +0000 gbulmer 2841@http://forums.leaflabs.com/ <blockquote><p>if I have a pin configured as an output, it is safe to have current drain into it?</p></blockquote> <p>Yes, as long as the circuit obeys the current limit for a pin ... and it is configured correctly. </p> http://forums.leaflabs.com/topic.php?id=540#post-2839 Fri, 26 Nov 2010 18:01:31 +0000 Silntknight 2839@http://forums.leaflabs.com/ <p>There is one, but driving there is a pain because I have to go through a lot of construction to get there.</p> <p>I like the part about "power c(h)ords." I could see how that would get misinterpreted sometimes.</p> <p>Really quickly, if I have a pin configured as an output, it is safe to have current drain into it? I have an optoisolator LED with the anode connected to +3.3V and the cathode connected to the pin. When the pin goes low, the LED turns on. This is my way of correcting for getting an inverting MOSFET gate driver when I needed an non-inverting one. </p> http://forums.leaflabs.com/topic.php?id=540#post-2838 Fri, 26 Nov 2010 17:57:56 +0000 gbulmer 2838@http://forums.leaflabs.com/ <blockquote><p>I already ordered one wrong produce, I'd rather not make that mistake again. </p></blockquote> <p>Is there no Radio Shack, or Fry's electronics, or something, nearby? </p> <p>When I was looking, I figured out which plug I needed by going into Maplin (an overpriced UK electronics and gadget shop), and just plugged each plug on their display stand into an Arduino until I got three that fit.</p> <p>I've done a similar thing in Radio Shack for laptop power chord; we needed one with a US mains power plug (it actually took most of the time to convert the English "Power Lead" into the term "Power Chord" which the sales assistant understood, and which confusingly is a term used by 70's UK rock bands). </p> http://forums.leaflabs.com/topic.php?id=540#post-2836 Fri, 26 Nov 2010 17:28:23 +0000 Silntknight 2836@http://forums.leaflabs.com/ <p>Thanks. I'm probably going to use the pads near the power connector. I already ordered one wrong produce, I'd rather not make that mistake again. </p> http://forums.leaflabs.com/topic.php?id=540#post-2827 Thu, 25 Nov 2010 10:14:37 +0000 gbulmer 2827@http://forums.leaflabs.com/ <p>I believe those pads are connected the way you describe.</p> <p>You could also use the LIPO socket, or even the USB socket, or VIN on the header.</p> <p>I can't see my battery pack that I use, but I amm 99.9% sure it is a standard 2.5mm DC plug, I know that a 2.1mm DC plug works too (there is enough spring to mate with either plug).</p> <p>Sparkfun have the part that matches the Eagle footprint, and it is 2.1mm<br /> <a href="http://www.sparkfun.com/products/119" rel="nofollow">http://www.sparkfun.com/products/119</a></p> <p>That has a link to an engineering drawing of the part, which has all of the dimensions. </p> http://forums.leaflabs.com/topic.php?id=540#post-2822 Wed, 24 Nov 2010 22:47:17 +0000 Silntknight 2822@http://forums.leaflabs.com/ <p>What size is the barrel connector? I need inner diameter and outer diameter.</p> <p>EDIT: I just noticed that there are two small pads near the power connector on this image: <a href="http://www.flickr.com/photos/48069758@N08/4613457315/in/photostream/" rel="nofollow">http://www.flickr.com/photos/48069758@N08/4613457315/in/photostream/</a><br /> Can those be used to connect power to? It appears that the lower one is connected to a ground plane and the upper one is for +Vin. Can I simple solder to that? </p>