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 on: February 15, 2019, 05:16:58 PM 
Started by tigerstyleee - Last post by tigerstyleee
Hey all!

I use a Casio MT68 onstage, and I would love for it to be more performance friendly.

I'm looking to add two things:

1. Start/Stop trigger for the percussion

2. Clock pulse out to drive Volcas etc. I had thought of using the LED out but this only pulses once every 2 bars, so the Volcas wouldn't respond.

Does anyone know if there's anything I need to use apart from just connecting a jack socket to the Start/Stop position on the board?

And if anyone has any smart ideas about how to output a tempo/pulse, I'd love to hear it!

Thank you!!

 on: February 05, 2019, 01:46:53 PM 
Started by Jaytee - Last post by marilynchaisson
You said the following, "You can hear the effect on the output, but I can't get any input into it. " However, I am not sure what you mean and how this works:)

 on: January 31, 2019, 01:53:36 AM 
Started by mekkah - Last post by voodoolikeudoo
Looks like the 100ohm 1 watt resistor shown up on the top left of the schematic by the rectifier labelled S2VB10

 on: January 30, 2019, 08:47:09 AM 
Started by melt_pingu - Last post by silverbull
TR-626 I would like to have a replacement as well.

 on: January 30, 2019, 08:45:23 AM 
Started by ujuoh - Last post by silverbull
I think it is possible.

 on: January 21, 2019, 10:15:52 AM 
Started by gmeredith - Last post by Coconut
I agree that it is very suitable for education.

 on: January 21, 2019, 10:15:06 AM 
Started by samspike - Last post by Coconut
I don't know which direction to change.

 on: January 21, 2019, 06:17:13 AM 
Started by Circuitbenders - Last post by LoopUdu
Just finished my Weird Sound Generator from Music From Outer Space

You can buy the PCB from the site for $15 and its well worth the effort.

There is something I don’t get. To connect both voices at the point called »ODD« in the schematics do you have to insert a wire bridge (on the pcb right from the filter)?

 on: January 18, 2019, 02:38:37 PM 
Started by Jaytee - Last post by boneless
All built with a 15k Resistor and 9v voltage regulator. (see above post)

Delays work fine and sound gritty and good. I don't seem to have any audible frequency chopping though. I can hear it has an subtle effect on the delays, but not on the main voice.

Distortion seems to work fine, and delay and feedback. Frequency pot doesn't seem to do much. I'm guessing that should sweep the 4 bands of chopping?

I might do a demo to see if folk think it's normal...

In the meantime anyone any ideas on where to look on the PCB.

It was a nice clean build apart from the 5v regulator. I accidentally put the 9v one in and couldn't desolder one of the legs out so had to sit it on top. Looks awful, but the power LED lights, so I guess 5v must be getting through. And looking at the schematic, that doesn't seem to effect the chopping circuit.



I freaking hate it when it don't work first time!

 on: January 14, 2019, 07:33:02 PM 
Started by Jaytee - Last post by boneless
Hope you've got your PT working by now...

LOL! 2 years on and I'm finally getting round to building mine!

Firstly a power supply question:

I'm putting it in my eurorack so should I bother with the voltage regulator to take 12V does to 9V? I'm assuming my Bastl marton case provides 'clean and stable' power, but I've never checked.

And secondly for R27 I only have 16k. I could kludge 10K+5K in series, or use 16K.

It looks like R27 goes to ground from the LM358, but being a being an-electronic-dunderhead, I've no idea what using a different value here will make.

Thanks electronic-nerd-friends!

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