http://forums.leaflabs.com/topic.php?id=1793 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:21:04 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=1793#post-10857 Thu, 24 May 2012 18:20:03 +0000 compuslave 10857@http://forums.leaflabs.com/ <p>Jeezus, I'm dense. I didn't think of switching the signals that way. Thanks, mang!</p> <p>Basically I have an LED with three leads. Mode, VCC and ground. VCC stays hot and when mode is grounded it switches colors. </p> http://forums.leaflabs.com/topic.php?id=1793#post-10856 Thu, 24 May 2012 18:02:47 +0000 crenn 10856@http://forums.leaflabs.com/ <p>Unfortunately without knowing more about the LEDs, we're not able to help much. If the LED draws more than 8mA from the signal source, then I'd say that using a transistor is a better idea. You can still use PNP transistors, just 'flip' the signal so to speak (HIGH instead of LOW, etc), however I'll admit my knowledge on transistors is rather limited.</p> <p>Can you give us a circuit diagram of how it was previously layed out? And how you're intending to lay it out? </p> http://forums.leaflabs.com/topic.php?id=1793#post-10852 Thu, 24 May 2012 16:58:19 +0000 compuslave 10852@http://forums.leaflabs.com/ <p>Forgot to say that it may also be interesting to use a potentiometer rather than serial, but both would be ideal as I would learn more.</p> <p>Thanks fellas! </p> http://forums.leaflabs.com/topic.php?id=1793#post-10850 Thu, 24 May 2012 16:31:59 +0000 compuslave 10850@http://forums.leaflabs.com/ <p>Hi guys, sorry if this is in the wrong section, but I didn't see a more appropriate place. I have one of those 7 color LEDs and wanted to write a sketch where I could enter a number, 1-7 and have the LED show the corresponding color. There is no data sheet on this device, but I did find some info for it. It cycles through the colors based on pulses from a momentary switch. I wanted to implement the switch digitally in the maple realm. I'm not sure that it will work, but I think I can give a number of quick pulses and have it go to that color. </p> <p>So I guess it needs to read from serialUSB a value, then turn that into a number of pulses on a digital pin which will activate a transistor. All I have are PNP transistors atm. Can I do this somehow without a transistor?</p> <p>Any help would be appreciated. Pointing me to a sketch I can modify would help as would any basic electronics know-how. Thanks in advance! </p>