Joined: Nov 10, 2011 Posts: 878 Location: Lancashire, England
Audio files: 14
Posted: Sat Feb 04, 2012 5:28 am Post subject:
Luminescent Heterodyne Signal Decoder Subject description: (Photo-theremin OF MADNESS)
I have not explored all the possibilities in this video, it is possible to get it to make rhythmic beeps and growls, additionally one can use an individual oscillator group (there are two groups of three) for a less distorted/mad sound.
In this video the case is still unfnished, see the attached photos for the end result There is also a circuit diagram attached.
The case is real wood and the knobs are from old radios, some bits of tin can were used too along with many scavenged parts for the circuit.
The circuit is very simple: just light controlled oscillators and a mixer really, with a bit of heterodyning thrown in to make things more interesting!
Looking at it now, I can see where I could have added light sensitive volume control, oh well, I'll impliment that next time!
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circiut diagram pototermen.jpg
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_________________ As a mad scientist I am ruled by the dictum of science: "I could be wrong about this but lets find out"
You get a lot of bang for your buck with such a simple circuit.
Here are some tips I discovered when I was messing with a similar circuit. In mine I used 1 inch long pieces of heat schrink tubing that fit over the ldr's so they respond a little better and you can aim them in different directions.
I also used a votlage starve pot wich really adds a whole new flavor to the sound. Super easy, just a voltagedivider going directly to pin 14 of the 40106.
An extra advantage of using the heat schrink tubing is that you can fit a 5mm led in there perfectly. I once used a super cheap hallmark electronic greeting card, just ripped off the speaker and used the 6 leds on the LDR's, great for cool patterns.
Keep up the good work, Im really enjoying these threads. _________________ There he goes. One of God's own prototypes. A high-powered mutant of some kind never even considered for mass production. Too weird to live, and too rare to die.
Hunter S. Thompson movies noise
Joined: Nov 10, 2011 Posts: 878 Location: Lancashire, England
Audio files: 14
Posted: Mon Feb 06, 2012 1:35 pm Post subject:
Thanks everyone
Tjookum: I intend to make some home-made vactrols in just that fashion (But with tape and wire because I cant afford heat shrink like you rich folks ) Thanks for the tips
Draal: I acctually made this in a room with a flickering filament bulb it's about 50 or 60 years old and it hasn't broken, just gotten flickery.
Mosc: Thankyou oh great wizard of the electro-music!
P.S. I'm too poor to keep everything I make, should I post the link to the ebay auction for it here or in a separate thread in the "for sale" section? _________________ As a mad scientist I am ruled by the dictum of science: "I could be wrong about this but lets find out"
it's about 50 or 60 years old and it hasn't broken, just gotten flickery.
Sounds like me.
JingleJoe wrote:
I'm too poor to keep everything I make, should I post the link to the ebay auction for it here or in a separate thread in the "for sale" section?
Good idea. You might try to sell these thingies here. If you're lucky, you can save some Ebay fees. It's up to you. _________________ --Howard
my music and other stuff
Joined: Nov 10, 2011 Posts: 878 Location: Lancashire, England
Audio files: 14
Posted: Wed Feb 08, 2012 12:09 pm Post subject:
Thanks for the suggestion mosc, I may try that with some better stuff but I can never gauge a good price for them _________________ As a mad scientist I am ruled by the dictum of science: "I could be wrong about this but lets find out"
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