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ke4ukz
Member Since: June 18, 2012
Country: United States
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Is the example picture with one LED or all five?
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You guys are awesome for tearing one apart so we can see the guts.
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I'm not sure how much one would need an Internet-controlled blanket, but controlling things from the Internet is awesome!
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I don't think anyone has mentioned it here, but the SparkFun Logic Level Converter does this with practically no pain. It's good for two channels, and it's pretty cheap. I've used one to connect my Arduino UNO (5V) to an iPod (3.3V).
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The datasheet mentions a checksum but doesn't tell you anything about it. Wikipedia has a bit of code that calculates a checksum for a given string.
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The 1 means it can't get a position fix (because it can't see enough satellites). All of those commas are telling you that it isn't seeing any satellites. Are you in a basement or near a bunch of interference? Have you tried putting the receiver near a window or outside? Are you getting any other messages?
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Mine was 9600. Haven't tried to change it since that's fast enough (for now, at least).
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Check out http://www.robotroom.com/PWM4.html, scroll down to the section on dimming 7-segment displays: he shows you how to hook a PWM signal to an NPN transistor to vary the brightness of several common-cathode LEDs at the same time.
