[sdiy] simple circuit to adapt pedals in a module?

[legion at helpwantedproductions.com]

Thanks for the suggestions.

CGS is out of the  60 PCBs so I just wanted to make sure I wasn't missing
anything if I did a mock of this.

On the other hand the CGS46 seems a bit more complicated (and the PCB is
$20 instead of $5) so I'm wondering which parts of which circuit I can
throw in if I want to make some stomp boxes out of modular circuits.

Will fire up the breadboard (is that even possible?) this weekend. Thanks
for the ideas!




> Completely agree with Derek. You can't strip much from the CGS60.
> It's pretty much as minimal as can be and still do the job adequately.
> If the jacks are a problem, solder wires directly to the PCB - the
> circuit remains the same, but you might make it cheaper by leaving
> out the hardware.
>
> T.
>
> On 25 Jan 2010, at 17:33, Derek Holzer wrote:
>
>> I can't really imagine a much simpler circuit than the CGS 60.
>>
>> On the "to effects" side, it just chops down the voltage of the
>> signal with a passive voltage-divider by a factor of 20.
>>
>> On the "to synth" side, it uses a simple, non-inverting op-amp
>> buffer to boost the weak effects signal 20x.
>>
>> If your effects won't go back into the synth, you can even leave
>> the second part out.
>>
>> But both of these things will need to be done to get the levels
>> matched bi-directionally. The ratios could be changed, but the
>> circuit would remain the same. Alternately, if you only want to
>> send to the effects then a single pot wired as a voltage-divider
>> would allow you to adjust the "to effects" level.
>>
>> Why not breadboard this one?
>>
>> D.
>>
>> legion at helpwantedproductions.com wrote:
>>> I'm working on making some guitar pedals and other kit designs
>>> that run
>>> off a 9vt PS and take a high input into my modular synth. I've got
>>> the
>>> power/regulator circuit down but was wondering if there is a simple
>>> circuit to allow the mismatched audio signals to talk to each other
>>> easily. I'm familiar with the CGS 46 and CGS 60 PCBs but was
>>> hoping for
>>> something a bit simpler without the jacks and such since I might
>>> make some
>>> old 9vt pedals into a module and also mount some module PCBs to
>>> make them
>>> into guitar pedals. I just need a few builds of the basic part to
>>> experiment with before I decide what I'll officially make.
>>> An existing PCB design would be ideal but I can jury rig or
>>> breadboard
>>> something too if it'll get the job done much cheaper.
>>> Thanks for any/all info!
>>

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