Way back in March [Ch00f] took on a for-hire project to make a suit that lights up to the music. He decided to build something based around a pulsating EL panel. He’s put a lot of time and tried of a few different techniques, but he finally has a working EL panel dimmer.
This is a saga we’ve kept our eye on. The fall seems to have been good to him, after a failure using TRIACS he managed to adjust the brightness of some EL wire by messing with the current going to the driver’s oscillator. Standing on the shoulders of that success he designed the board seen above by getting serious about audio signal processing. There’s a microphone on the board which picks up sound which is then processed into a signal responsible for the brightness of the EL panel.
There’s a demo video after the break, but you’ll want to dig into his article to get all the gritty details.
8 thoughts on “Months Of Failure Lead Up To This EL Panel Dimmer That Pulses To The Music”
Hm… this gave me an idea…
Have a very simple script that can change the laptop’s backlight brightness based on music volume.
Would be rather simple with bash and some other things (converting the pcm style input from mic into a number within predifined range). Writing to the file /sys/class/backlight/acpi_video0/brightness will change the brightness
Just an FYI, the embedded video is not a demonstration of the finished product. This is the video of the finished product shown at the bottom of the blog post. http://www.youtube.com/watch?feature=player_embedded&v=bBZD849oG9g
Also, the blog post linked to is incorrect. The correct post is here: http://ch00ftech.com/2012/12/14/sound-reactive-el-panel-dimmer-pretty-much-done/
Disregard. Both have been fixed.
“Standing on the shoulders of that success…” that was his own previous success right? Does that mean he was standing on his own shoulders? How is that possible? Does that give him the ability to fly? :0
It involves some very advanced yoga techniques.
Ch00f should have tried using brushless fan speed controllers (as used in cheap eBay PC fan controllers), they work great, very smooth fading, easy to get hold of, and only needs a stock inverter.
Wouldn’t you still need 100VDC to use a fan controller? And would the controller even be able to handle such high voltages?
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