October 19, 2011
about 5 months ago
You just made my day. And more importantly, by reading and taking action so quickly based on my comment, you just made me a lifelong SparkFun-loyal customer. Thank you!
Thank you for your answer! Are they not manufactured in green, or did you just decide not to stock them? The number of possible applications of these leds increases significantly if there were three primary colors. So you would probably sell more of red and blue if you had green as well.
Red, Green and Blue are primary colors, which means you can create any color by blending different amounts of these three.
So, in answer to your question, your plants may not need the green light, but anyone (like me) wanting to create a light with any color needs green along with red and blue.
I found Red, White and Blue. I am the only one missing Green? My plans involve RGB.
News - October Caption Contest
about a year ago
Grounded by the triangle pose.
about 2 years ago
I have successfully used this with two Arduinos. I was stuck at first, so these points might be of help to others:
1) Using the VirtualWire library linked above is a really good idea. Then you don’t have to worry about noise or how the signal is actually transmitted. Simply call a function to send an array of bytes on the transmitter (currently max 27), and call another function to wait for incoming bytes on the receiver. Copy-paste the example code for setup(). It’s super easy!
2) The VirtualWire library has a function to set the TX and RX-pin. But do not use pin 10! Pin 10 is assigned as default for something else (PTT, push to talk? I don’t know, but probably don’t need to know either). You might make it work on pin 10 by assigning PTT to another pin, but I haven’t tested that. I just know that it does not work if you select pin 10 for the receiver.
3) There are three GND-pins, and two VDD-pins. My device works fine if I only connect one of the GND-pins and one of the VDD-pins (either is fine).
4) A comment below mentions the need to connect the linear output pin to ground via a resistor to improve signal quality. Perhaps this is true, but I was able to get communication working without the resistor, so don’t worry about it to begin with.
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