[sdiy] Musical Neon Oscillators

[Mike HEQX]

just like organ foot pedal oscillators


On 9/23/2017 12:17 PM, Richie Burnett wrote:
> Thought you guys and girls might like this...
>
> https://youtu.be/wwDfF5mwlOc
>
> It was mentioned on a high-voltage forum that I frequent. Apparently 
> it runs from a 107 VDC nixie tube power supply.  Each note uses it's 
> own relaxation oscillator made up of a neon bulb, capacitors and 
> resistors.  No microcontrollers, transistors, diodes, op-amps, etc.  
> Copper foil is used for the keys, and tremolo looks like it's 
> implemented by varying the pressure on some carbon-loaded anti-static 
> foam used to play the notes. Neat!
>
> -Richie,
>
>
>
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