1 # Cyclabile, a light augmented bike lane emitter
3 Cyclabile is an experiment about projecting a moving bike lane on the road: the
4 lane moves when the bike moves, producing the effect of riding on an actual bike
5 lane, even when there isn't one.
9 * `libam7xxx0.1` - a library to use USB pico-projector based on the am7xxx chip.
10 * `libturbojpeg0` - a library for fast JPEG encoding
11 * `liblept5` - a library for image processing, used to calculate a perspective
16 The effectiveness of projecting on the paving instead of signaling the presence
17 with a traditional light can be argued.
19 For now the project purpose is more about making a statement (there should be
20 more bike lanes) than to build an actual product.
24 The prototype has been developed on a BeagleBone Black.
26 A keypad is needed to adjust the perspective projection parameters, see
27 http://ao2.it/137 for instructions about how a device-tree overlay can be used
30 A precise rotary encoder is needed to detect movement at very low speed,
31 something like the one at https://ao2.it/135 can be used.
33 The instructions at https://ao2.it/138 show an example of how to build a support
34 to mount a magnet ring on the front wheel of the bike.
36 The device-tree overlay at https://git.ao2.it/experiments/bbb-eqep2b-ao2.git/
37 enables the BBB hardware support for rotary encoders.
39 To build the project for the BeagleBone Black execute the following command:
43 And install the systemd unit to launch the program automatically when the USB
44 projector gets connected:
46 $ sudo make enable_service
48 The software can also be tested on a normal desktop PC, emulating the encoder
49 with the mouse wheel, with the following command:
51 $ make && sudo make run
58 "*Safety First*" is an art installation by Vladimír Turner and Ondřej Mladý very
59 much in the spirit of Cyclabile.
61 * <http://sgnlr.com/works/outside/safety-first2011-prague/>
62 * <http://vimeo.com/23469752>
64 The difference is that Cyclabile is more portable and more interactive, the bike
65 lane moves depending on the bike movement while "*Safety First*" used a video
66 recording in a fixed loop.
69 ### Bike Projector Headlight
71 This is more generic, it's used to display info on the road, not specifically
74 * <https://makezine.com/bike-projector-heads-down-display-stationary/>
75 * <http://www.reddit.com/r/technology/comments/1anmip/guy_builds_a_speedometer_built_from_a_raspberry/>
76 * <http://www.youtube.com/watch?v=Nfk1-XMASrk>
81 A laser bike lane, it projects a static image.
83 * <https://www.wired.com/2009/02/lightlanes-lase/>