User Manual

Installing your SpokePOV

Once you've built and tested your SpokePOV, and uploaded an image, you can install it on your bike wheel.

The easiest place to install on a wheel is one of the large gaps between spokes. Your bike wheel may be a little different. The most important thing is that you don't install it so that the metal spokes scrape against any electronics so that they can short. As you can see in the picture below, I installed this SpokePOV so that it is inside the wheel: the spokes are all either to the side or in front where they only touch the LEDs (which is OK, they're plastic). When you clip the zipties, make sure to leave a little tail, if you cut them too short they are more likely to fail.

Use zip-ties (available at any hardware/crafts/office store) to attach the SpokePOV to the spokes.
Attach the magnet to your frame. If you have a steel bike, this is really easy. You want to make sure that the south side of the magnet is facing out since the sensor is sensitive to the south side only. Try to put the magnet as close to the sensor as possible. Press the button to turn on the SpokePOV and try moving the wheel back and forth around the magnet, you should see the LEDs start to blink.
Now spin the wheel clockwise and stand back to see the image! (Turn off the lights for best results.)

Using the SpokePOV

There isn't much involved in using the SpokePOV. If you're worried about riding it in the rain, you can conformally coat the board (except for the button, which is waterproof, and the battery clips and header). Basically that means you coat the board in spray-on silicone which protects it against moisture. If you don't want to conformal coat, I'd suggest just keeping the SpokePOVs off while riding in the rain, and drying them off so that the batteries don't corrode. Unfortunately, there does not seem to be a simple, inexpensive way to make waterproof enclosures at DIY-level quantities.

The SpokePOV has three modes: off, idle, and display.

  • Off mode is pretty much just off: the SpokePOV is consuming absolute minimal power. To turn it on, press the button & it will enter idle mode.
  • Idle mode is a low power but active mode: the SpokePOV is waiting for the wheel to spin but it's not actually displaying any images. For example, it was just turned on. Or the wheel hasn't spun in the last few seconds. The SpokePOV will display one lit LED on each side to tell you it's still on. The LED itself may vary, as it is also used to debug the SpokePOV. If the SpokePOV doesn't receive any magnet signals in a few minutes, it will turn itself off to conserve power.
  • Display mode is when the SpokePOV is receiving magnet signals and is displaying the stored image. This mode is probably what you bought the kit for. If it doesn't get any magnet signals for a few seconds it will go into idle mode.

The only interface to the SpokePOV is a single button. It works rather simply. Press the button quickly to reset the SpokePOV or turn it on if it's off. Press and hold the button for two seconds and then release to turn it off. If the SpokePOV is on there will be at least one LED lit. If the SpokePOV is off there will be no LEDs lit and it will not respond to the magnet until turned on.

This guide was first published on Apr 17, 2014. It was last updated on Apr 17, 2014.

This page (Install) was last updated on Apr 19, 2013.

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