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new drsstc based upon my new driver topology(Musical DRSSTC)

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LAN_403

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Sat Jan 12 2008, 09:28AM

Registered Member #76 Joined: Thu Feb 09 2006, 10:04AM
Location: Hemer, Germany
Posts: 458

Sorry for doubleposting.

Some newer infos.
found the failure and started to get further. the circuit works, but is far away from good.
but have a look at the videos aand you will see which way i go with this drsstc.

I think ive choosen the complicated way to use analog music signals to generate the "in between on time" pulses to get the right sound.

this was the very first circuit and is very simple. tommorow iÂ´ll test a other circuit which squares up the input analog signal much better.

i have to work on it. the pulses are too fat and "wishy" and the drsstc starts going into "Failure mode", means, the relais on the bridge disconnects the bridge voltage. thats the case on end of second video due to overcurrent and undervoltage lock out

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Sun Jan 13 2008, 04:10PM

Registered Member #76 Joined: Thu Feb 09 2006, 10:04AM
Location: Hemer, Germany
Posts: 458

Sorry for the bad soundquali....

and on youtube

thats what i was working for :)))

Marko

Sun Jan 13 2008, 04:40PM

Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145

OMG do you have more?

If that is bad quality sound, how will good quality look like?

I haven't heard DRSSTC sounding that well in a while... did you use midi input? What circuit?

yikes.

How do you manage to use that high coupling and never get flashovers?

I have a very close secondary here, same diameter and about the same length with 0.15mm wire, and it flashes over like crazy even though my coupling is at least twice lower than yours.
I was really frustrated, but you keep using those large helical primaries without problem.

Your surge impedance appears to be about 8.8 ohms from data you given. Could rate of rise of output really affect flashovers so dramatically? Meh.

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Sun Jan 13 2008, 04:48PM

Registered Member #76 Joined: Thu Feb 09 2006, 10:04AM
Location: Hemer, Germany
Posts: 458

Hehe, thanks.

No, its no midi based circuit cause i dont wanted to spend weeks of time to get into microcontrollers and midi interfaces.
the circuit is fully analog and is fed with analog squarewave musical date from a laptop or a simple cd player or mp3 player etc. no need for expensive computers around the drsstc.

this vid where taken with the prototype board of the circuit, build up on prototyping board and wires etc. so its not shielded etc, but works really great.

if i want a melody, i get the midi and put it in a simple sampler program. then i use a real squarewave synthesizer to generate the data i need. converting into a wav and play it. thats it.

with a laptop with midi keyboard plugged in and this simple squarewave oszillator, it would be possible to play in realtime or play midi sequences in realtime without problems.

no need for a microcontroller at all

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Sun Jan 13 2008, 05:47PM

Registered Member #76 Joined: Thu Feb 09 2006, 10:04AM
Location: Hemer, Germany
Posts: 458

Sorry, doublepost, but for the projects forum and new infos i think its okay.

1200246094 76 FT35821 Musikalinterrupter

i have no problems to post the shematic for my musical interrupter,. dont know why others make a mystery out of that. its not half that complicated like some people used to say..

and a important part for the function is the data that comes in. so heres a wave file ready to use and for comparisation

now everyone should be able to clone my work and see what happens in the circuit. its not that complicated at all

Marko

Mon Jan 14 2008, 01:27PM

Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145

Sir this is simply amazing. You really never got flashovers over there?

Must try something like this if I ever get my DRSSTC working.

I wonder if you are a guy who built the total most of DRSSTC's around here (Chris H.?).

I really don't know why this gets nobody's attention. Forum is just so gloom lately.

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Mon Jan 14 2008, 05:37PM

Registered Member #76 Joined: Thu Feb 09 2006, 10:04AM
Location: Hemer, Germany
Posts: 458

maybe its mostly for the reason i always build relatively small sized drsstcs and not so good looking ones like christopher miles etc.

i love to experiment and so all of my drsstcs are unique. i never build 2 drsstcs using the same driver etc.
so, this new drsstc is working well with a total unique driver topology and an anlog music to pulse converter.

maybe the primary looks like it has a high coupling, but the sec diameter is 11cm and the primary outer diameter is 28cm. i got flahovers before i changed the metal screws on top of the primary for plastic ones. i added a 2mm thick plexi circle which overlaps the primary around 2 cm. no flashovers after that.

and for the drsstcs. although i call it the drsstc7 iÂ´ve build 10drsstcs and maybe 10sstcs 3vttcs and some in between versions of some kind (scr sisg etc) oh i forgot the 3 sgtcs i build

and so on. i dont understand why "prominent" members made a mystery , a secret out of these musical thingys. you dont have to learn a compiler language to prog a simple ÂµC that will do the job for a simple 555. thats just overkill
okay, a real ÂµC thingy for midi input and pulse output for drsstc use is a other league

Tom540

Mon Jan 14 2008, 07:02PM

Banned on 3/17/2009.
Registered Member #487 Joined: Sun Jul 09 2006, 01:22AM
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Posts: 617

I think the micro is kinda pointless too. I was planning on doing an analog pulse converter as well to play from any audio source using a comparator and adding a low pass filter on the front end.

Yours is a lot more simple though. Nice too bad i cant hear the audio from your videos here at work.

Steve Ward

Mon Jan 14 2008, 07:29PM

Registered Member #146 Joined: Sun Feb 12 2006, 04:21AM
Location: Austin Tx
Posts: 1055

I think the micro is kinda pointless too.

All i can say is "no way". My MIDI interface blows away ANY analog type of pulse generating thing. It can encode pulse widths (assign a PW to each note seperately) and reproduces the notes very accurately. Not to mention that i can very cleanly produce 2 notes at the same time on one coil. You cant do that with a zero cross detector or anything, at least not without generating extra harmonics that you didnt actually want. For anyone who is afraid or doesnt want to spend time learning about micro-controllers, you are missing out on a seriously useful tool and will be wasting your time with seriously complex logic circuits that probably wont perform as well :P.

Marko, have you watched many of the youtube videos of my big twin coils? They are very "clean" in real life, though many videos are outdoors where sometimes the sound can be compromised. The smaller coils are even cleaner sounding as they can handle higher pitched notes without strain. Id get some videos but i have no decent video camera.

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Mon Jan 14 2008, 07:42PM

Registered Member #76 Joined: Thu Feb 09 2006, 10:04AM
Location: Hemer, Germany
Posts: 458

for sure. with a microcontroller its no problem at all to make those things, but if i connect a laptop to my circuit and a midi keyboard to the laptop, i can make everything you said without spending time in learning microcontrollers.

all you need is a sampler that converts the midi signals to sound, with all the promising addictions you described. working with that squarewave is a lot more simple than learning about an old musical standard

aand, how should i be able to get into this, with microcontrollers and all that, without havin a source for comparisation??? i have no clue how to begin and what which bit in a midi protocol is for.. do i have to invent the wheel for the thousand time?? no. surely not. my way, my invention, everything is fine.. i hate to clone projects or so, but i was surprised that nobody, neither you or steve conner, has infos or barely shematics about how you made it!

with a laptop and sampler i can add delay, chorus etc, no problem at all. so i have all options open

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