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Hi! LEDs wired in series still should have a resistor, although it works for a bit it's not regarded as "correct":http://electronics.stackexchange.com/questions/283...
Hm, what did the error say? I'd love to help you get it working. Troubleshooting is a huge part of building your own circuits! =D
Awesome job, that turned out great! Can't wait to see what else you knit up. =D
Woohoo, that looks great! Congrats!
Agree, these concepts are important in order to use the Arduino to it's fullest potential, and because they help you work with some of the less intuitive behaviors of electronics. I'd love to cover these concepts in a more advanced Arduino class, but think they're outside the scope of "your first few breadboard experiments." Thanks for your comment!
Try a lower value resistor connecting your Arduino pin to the transistor
Yay thanks! Looking great.
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That looks great! Of course you could make another with your Uno on a larger scale! Thanks for sharing with us!
That turned out awesone!!! Big congrats and I can't wait to see what else you knit =)
rmtonkavich's advice would be sound if you were using a PN2222, but I see your datasheet and the pin configuration you have wired up appears correct for those transistors. However, the max current on the C1815 and C732 is 150mA ("collector current" on the datasheet), so it may not be able to deliver enough power to turn the motor (the motor suggested for the class draws up to 250mA, for example). You could use something less power-hungry to test your transistor function, like an LED-resistor pair.
Thank you for your kind review!
Pffft, I hear ya about brothers! =D
When you copy the code example, make sure to copy the whole thing. It sounds like you're missing the functions underneath the main Loop. "not declared in this scope" errors mean you're referencing a function that doesn't exist in your sketch.
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Hah, thanks for sharing! =D
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That came out awesome!! Nice work.
Looks like you've got the hang of it!
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I see you posted a popular internet image as your project-- not cool!
Nice circuit! But where's the mirror? =D
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The resistors aren't redundant-- each LED should have its own current limiting resistor. Although it's not quite the same case as the circuit you built, check out this discussion about why not to wire LEDs in parallel with one resistor:http://electronics.stackexchange.com/questions/222...Although the wiring changes you made obviously work fine, it's a good rule of thumb to always reserve power and ground rails for power and ground, so they remain consistently available when building larger projects.
Yeah, nice work!
Clear lens LEDs can be any color. This lesson refers to the LEDs that come in the recommended starter kit, which are one each red, green, and blue LEDs with clear lenses. If you are using clear lens LEDs you find elsewhere, they may very well be white, yellow, or any other color! =D
Any single LED is only one color, and the RGB exercise uses one each in red, green, and blue. Your LEDs are white (except I see one red one in the second picture). The LEDs do not change color but rather mix in different brightnesses to produce light of an overall shifting color.
Whoohoo, congrats! I hope you continue to enjoy the class!
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Nice! Keep up the good work.
I'm glad you're enjoying yourself! Looking forward to seeing your progress through the class.
Thanks for your kind words! I'm glad my coding explanations are helpful. I look forward to following your progress through later lessons, and would be happy to receive your feedback or questions if you get stuck at all!
Awesome work! I hope you enjoy the rest of the lessons as well.
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Great work Amelia!
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D O P E Love it, awesome job!!!
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I see! Thanks for the insight!
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