Screaming Angels - Prototype 6 Way Stereo Optical Theremin Noise Maker

Screaming angels is available to buy fully built, as a kit or build instructions here:
http://www.symetricolour.etsy.com in USD and http://www.folksy.com/shops/ChrisDodsworthDesign in the GBP
Its also listed on Ebay in the musical instruments section.

Don't worry, It's meant it go dark in the middle! Here's something fairly obvious to try with a hex schmitt trigger inverter chip. Wire up all six sections as optical theremins with 3 in each channel for some weird stereo atonal action.

Update: It seems I made a small mistake when I wired this up and later discovered it was generating triangle waves rather than square wave which is what I expected. Nice happy accident!

Category:

Music

Tags:

• screaming
• angels
• hex
• schmitt
• trigger
• inverter
• 40106
• 74AC14
• opitcal
• theremin
• lofi
• handmade
• electronic
• music
• noise
• maker

[thecaldwellsband]

can you upload the schematics for this please?

[ChrisLody]

@thecaldwellsband You can get the build instructions on CDR from my etsy shop for a small fee, i've added a link to the info pane below the video. Cheers :D

[max269]

GAH!!! that scared me so much at 0:17 LOL

[ChrisLody]

@max269 Heh heh, sorry about that!

[JimDungu]

Thanks for the link chris I will read with interest (after brushing up on my german!)

[ChrisLody]

@JimDungu No worries. I don't speak german, but its the best set of simple oscillator diagrams i could find. cheers.

[ChrisLody]

@JimDungu Thanks. Its all done from the output of the schmitt trigger, but the triangle wave is taken from the input side, something i found by mistake. I'll send you a link via PM. Cheers.

[JimDungu]

Way cool! I like the sound of the triangle waves - a lot less harsh than the squares by the sound of it (or did you roll some of brigthtness off?) I didn't realise it was possible to get anything but square waves from the hex schmitt trigger - what did you do different?

[JimDungu]

Way cool! I like the sound of the triangle waves - a lot less harsh than the squares by the sound of it (or did you roll some of brigthtness off?) I didn't realise it was possible to get anything but square waves from the hex schmitt trigger - what did you do different?

[ChrisLody]

I'm shortly going to be making a CDR with the schematic, components list, strip board layout and step by step constuction details for this and the Warring Demons available in my Etsy shop for a small fee. Also there will be kits for both of them including all the components. I'll let you know when I 've finished writing all the instructions if you like. Cheers