My twin SN-Voice

synthmonger · Posted: Sun Nov 26, 2006 10:30 pm Post subject:

Taking pre-orders? 8D

bugbrand · Posted: Mon Nov 27, 2006 2:34 am Post subject:

bugbrand · Posted: Mon Nov 27, 2006 2:39 am Post subject:

toppobrillo · Posted: Mon Nov 27, 2006 11:14 am Post subject:

v-un-v · Posted: Mon Nov 27, 2006 11:25 am Post subject:

State Machine · Posted: Mon Nov 27, 2006 7:10 pm Post subject:

Here is the front panel layout for my SN-Voice without the knobs drawn. It will be printed out on inkjet transparency and adhered to a 2U rack panel. This will be my first prototype SN-Voice with the new printed circuit board.

I will hold off on orders until the first unit is built. The printed circuit boards will be ready on December 5, 2006. I am building the connecting harnesses now and I have all the parts for one completed unit that includes the hardware. switches, jacks, blank panel, semiconductors, passives, etc .... I should have it all built and tested by Christmas holiday.

More later !
Bill

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State Machine · Posted: Mon Nov 27, 2006 7:20 pm Post subject:

Uncle Krunkus · Posted: Tue Nov 28, 2006 7:02 am Post subject:

You do of coarse realise that there is a spelling mistake on your panel SM? Surprised

State Machine · Posted: Tue Nov 28, 2006 11:17 am Post subject:

State Machine · Posted: Thu Nov 30, 2006 8:48 pm Post subject:

Here is a picture of the first SN Voice board for the testing! Things are looking good so far. If all is well with the prototype, orders will commence Very Happy

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Scott Stites · Posted: Thu Nov 30, 2006 9:59 pm Post subject:

Swweeeeet!!!

v-un-v · Posted: Fri Dec 01, 2006 6:22 am Post subject:

very nice

synthmonger · Posted: Fri Dec 01, 2006 7:13 am Post subject:

Anyone else as antsy as me to get their hands on these boards? ^-^

Wild Zebra · Posted: Fri Dec 01, 2006 7:20 am Post subject:

Sweet!

State Machine · Posted: Fri Dec 01, 2006 12:08 pm Post subject:

Thanks guys! It's a fun project thus far. I am sure you all notice that it does accept both SN76477 chip package sizes. In my example, the "skinny" is used and thankfully the footprint I made in the layout program was correct.

I buzzed everything out to the schematic and everything looks accurate.

I am pinning the connectors this evening for J1, 2, 3 and drilling out the 2U rack panel early next week. By midweek I should have the front panel art adhered to it and all the switches, CCA, and POTS mounted to it. Soldering and calibration hopefully will be done by end of the next weekend if all goes to plan.

More on the way, hang tight guys !!

Bill

v-un-v · Posted: Fri Dec 01, 2006 1:32 pm Post subject:

Uncle Krunkus · Posted: Fri Dec 01, 2006 1:42 pm Post subject:

Beaauuuutiiiifullll! Smile

The Alison Project · Posted: Fri Dec 01, 2006 4:13 pm Post subject:

Looks great, very excited to get these boards (ordering two). State Machine feel free to do Scott's Phasor next, I'll buy it.

Chris

State Machine · Posted: Fri Dec 01, 2006 4:42 pm Post subject:

State Machine · Posted: Fri Dec 01, 2006 4:58 pm Post subject:

The Alison Project · Posted: Sat Dec 02, 2006 6:41 am Post subject:

I would definitely become a customer. Now back to the SN Voice let us know when we can get our hands on those PCB's, again thanks for doing this.

Chris

23isgood · Posted: Sat Dec 02, 2006 2:03 pm Post subject:

Looking sharp State Machine. I am very interested in the, 8 Channel MIDI to Trigger. Keep us posted.

pete

Tenine · Joined: Sep 13, 2006 Posts: 44 Location: Coventry

I have a few questions that I'd be really greatful if someone could answer please Smile

First, let me say -
If I were to build this project, I'd probably ommit the FM & LFO functions.

I wouldn't be bothered about 1V/Oct tracking for a few reasons -
I have no Voltage Controllable gear (and I'm not likely to in the future).
I'd either build it into a keyboard for jamming, build it's own sequencer (driven by my drum machine) or both (obviously you couldn't use both at once very succesfully!).

From what I can see on the schematic, only the pitch scaling parts of the circuit need 15V.

The SN76477N and 4046 all run off 5V.
The op-amps I assume are buffers for accurate voltage tracking, correct?

So, considering the sacrifices I'm willing to make, could I run this thing off 5V?

Another question I have is -
What is the 4046 for? Is it to drive a shift register for the noise?
I also see it's used as the Gate input, in what was is the 4046 necessary to the Gate / Envelope part of this synth?

I know that's a lot of questions, but I'd really appreciate answers if anyone could help, please Smile

Thanks,
Alex

sneakthief · Joined: Jul 24, 2006 Posts: 569 Location: Berlin