The Identified Plush Object Network is one of a few bigger projects that I want to work on this year. The idea is to create a network of small plush animals that interact with users, each other, and the Internet. I called it “Identified” because as a separate project I’m working with an RFID reader/writer module I want to create a simpler interface for, and once that piece is working each object in the network will be tagged as well.
The motivation for the project is non-profit work I want to do in the future with at-risk teenagers here in Orange County, CA. I want to create something that can be built in phases that get increasingly complex as the students learn, but that starts simple enough to enable hands-on participation from day one. Software improvements will be made in each iteration. [click to continue…]
I have recently received the following question from a reader:
I’m looking for a circuit board design that will need to turn on an array of LEDs when motion is detected during the day time, and also stay on continuously during the night time; using the Arduino would be nice. The project that I am working on is just a picture frame with my artwork in it. The art is actually an embossed piece. The light that I am placing within the frame will shine across the embossed art, and reflect off the raised areas of paper and make the picture appear more three-dimensional. So, the picture acts as a night light when it’s dark, and then turns on for a moment during the day time when some approaches the picture.
I suspected there had to be a simple circuit to accomplish this without having to program a microcontroller to take care of triggering the light. I could see that was overkill; after all, it is just a way to switch lights on/off. Still, I had no idea how to do it, if not from a software point of view.
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Back in April I posted about a goal I had for this year: setting up a decent workbench for myself in a corner of my (minuscule) home office. As the year comes to an end, I think it’s time for an update.
Did it happen exactly as planned? No…
Did I make progress? Yes!
So what happened?
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When I posted the “LED Control Using DIP Switch” sketch last year (a simple setup the turned on the LED corresponding to that switch position), I also had a slightly modified version of it in which the DIP switch controlled six different light patterns on the LEDs (scroll right, left, in, out, back and forth and random). It presented a “cleaned-up” version of the code using for loops and compared it to the “long-hand” version, showing the trade-off between ease of understanding and conciseness. Except that… I forgot to post it.
Last week someone contacted me asking a question about a similar project he is working on and when I wanted to refer him to this modified sketch I realized it wasn’t on the blog. (Here’s the original sketch and schematic for reference). [click to continue…]