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Registered Member #514
Joined: Sun Feb 11 2007, 12:27AM
Location: Somewhere in Pirkanmaa, Finland
Posts: 295
Here's something I've been working on and off for about a year.
It's a RGB led light that is controlled with PWM. It can be set to any color with the three pots in the front panel.
Here's a view of the innards. The PWM driver is bolted to the rear panel, transformer and voltage regulator on the floor. Diode bridge is made of 4 1n4007, soldered together and the smoothing cap mounted on top of it
Light source is a 1W RGB led. Though I'm only driving about 80mA into the diodes ATM... The only suitable transformer I had was a 15V one, and if I drive the diodes to 300mA each, things start to get toasty. I'll have to get a new transformer...
Top and bottom sections are made of low density polyethylene, front and rear panels of PCB laminate and the mesh was ripped from a dead speaker.
Next improvements after replacing the transformer will be making the top out of plexy so more light can escape and using mesh with larger holes.
Registered Member #103
Joined: Thu Feb 09 2006, 08:16PM
Location: Derby, UK
Posts: 845
That's actually quite nifty!
Now all you need to do is make 3 bandpass filters, with passbands that correspond to 3 audio frequency ranges for 'bass, mid and treble'. Use those outputs to modulate the 3 PWMs, and you have a 'music to RGB converter'
Registered Member #514
Joined: Sun Feb 11 2007, 12:27AM
Location: Somewhere in Pirkanmaa, Finland
Posts: 295
Avalanche wrote ...
Now all you need to do is make 3 bandpass filters, with passbands that correspond to 3 audio frequency ranges for 'bass, mid and treble'. Use those outputs to modulate the 3 PWMs, and you have a 'music to RGB converter'
Hmm, that is actually a really good idea. I'll have to look into that when (if) I get some more spare time. Won't be easy, though. With two new SSTC's and tons of other projects in the works and all
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PWM light thingy
It looks great, you should try selling them.
