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Member Since: March 28, 2014

Country: United States

  • I completely agree that the project is really cool, and Jade’s result is awesome. Kudos!

    I’m going to venture a guess, but I could be wrong: closer objects (read “pixels”) appear whiter, and more distant objects appear darker (and possibly smaller). You can use pretty basic trigonometry to get the x,y position of a pixel based on the angle of the servos and the distance measured.

    I’ve actually been working on a similar project, except my sensor is mounted on a multi-chassis (tank version), and sweeps only horizontally, for reasons of speed (5 minutes for a full picture isn’t practical for a vehicle application).

    I have multiple settings to control the resolution and speed of the sweep. That way, when the vehicle is stationary, the IR sensor can do a wide-angle slow sweep – taking a reading for every degree across a 180 degree arc; when the vehicle is moving, the IR sensor does a narrow-angle fast sweep – taking a reading every 15 degrees across a 60 degree arc.

    This looked really good when I drew it in Processing. I’m faking a 3D representation (the data is only 2D) by changing not only the darkness but also the height of each individual data point based on the distance, which simulates perspective. All objects ahead of the vehicle look like walls, essentially.

    My next step has been to implement iPhone remote-control using Bluetooth. The readings are currently being sent to my iPhone (using RedBearLab’s BLE Shield), but I have not yet implemented the graphical representation in the app.

  • I’m not an expert, but I think antennas are typically optimized for specific frequencies. This one is tailored for 2.4GHz, which would work well with wifi and bluetooth applications. GSM operates on a different frequency. You’d likely be better off with the quad-band cellular antenna: https://www.sparkfun.com/products/8347.

  • This may be a stupid question, but is there any reason you would get this when you can get the Rover 5 Motor shield (https://www.sparkfun.com/products/11593) – which has 4 motor outputs, 4 encoder inputs, and current sensing for each motor? The two items are the exact same price.

  • I realize your question is somewhat old, but for what it’s worth, you could try RedBearLab’s BLE shield (http://redbearlab.com/bleshield/). I just got one and hooked it up using the sample sketch. It worked well out of the box, although the iOS app they publish (mostly as a demo) is quite simplistic. I’m now learning to build a custom iOS app to communicate with it.

  • What type of capacitor would you use for this? Would a 0.1uF (https://www.sparkfun.com/products/8375) cut it?

  • What wireless communication unit do you intend to use to control it from your tablet? Would you have a peripheral connected to your tablet, or just use the built-in wifi or bluetooth? (I’m curious because I’m working on something similar and decided to give RedBearLab’s BLE Shield 2.0 a try…)

  • Former engineering student picking up electronics (likely focusing on robotics) as a hobby. I need one soldering iron, but don’t anticipate needing an iron for “in the field.” I’m mainly attracted to a Butane iron because I don’t have to worry about cords and I can use it while sitting on my couch in my living room (far from an outlet). What are the disadvantages (compared to an electric iron)? Will this get too hot and burn my components?

No public wish lists :(