Mission expressionator

[Mentaltossflycoon]

Didn't know this existed until jeffwhitfield posted his pedalboard. So my expression pedal fantasy post last week was basically this housed inside a crybaby with only 3 jacks. Might as well put it on the wish list too, right?

Expressionator – Mission Engineering

missionengineering.com

 

[giovanni]

That’s all digital stuff. I am not sure it’ll be easy to clone…

 

[Bricksnbeatles]

That’s all digital stuff. I am not sure it’ll be easy to clone…

Pretty sure it could be done with an attiny and some digital pot chips

 

[PedalPCB]

Absolutely. I'd like to know which ones are used.

There are no warnings in the owners manual about voltage limits and most of the digital pot ICs I've seen have a limit of VCC (3.3V or 5V) ...

 

[giovanni]

If that’s easy then I’m all for it!

 

[Bricksnbeatles]

Absolutely. I'd like to know which ones are used.

There are no warnings in the owners manual about voltage limits and most of the digital pot ICs I've seen have a limit of VCC (3.3V or 5V) ...

The MCP4xxxx series has a limit of 5.5v, and that’s what OBNE uses in the expression ramper.

 

[jeffwhitfield]

It’s a complicated one for sure. Ramper circuit alone would likely fill up a 125b board.

Still digging mine. Solves the problem of routing an expression pedal to multiple sources. Tried doing it with MIDI with limited success. This is far more reliable though.

 

[PedalPCB]

It'd be a fairly simple project with a low parts count, all of the heavy lifting is done in code.

I'd just want to be sure we're using the most robust digital pot available so it doesn't flake out the first time it gets hit with 9V on the expression jack.

 

[Bricksnbeatles]

The following all have a maximum voltage rating of either 16.5v or 33v…just various packages sizes, resolutions, and resistance options. All SMD I think

• AD7376
• AD5260
• AD5280
• AD5290
• AD5293
• AD5262
• AD5282
• AD5263

 

[ADAOCE]

This is awesome I’d be so into this since I have like four pedals I’d love to use expression with

 

[Feral Feline]

I missed out on getting in on the ground floor when a TBer was developing the Expressionator and made a limited run of them before selling the concept to Mission, so I'm very much interested in this one.

I have a lot of expression pedal inputs on various Dr Scientist and Diamond pedals...

So I'll probably need two or three of these Expressionators, maybe daisy-chained?

 

[Mentaltossflycoon]

I missed out on getting in on the ground floor when a TBer was developing the Expressionator and made a limited run of them before selling the concept to Mission, so I'm very much interested in this one.

I have a lot of expression pedal inputs on various Dr Scientist and Diamond pedals...

So I'll probably need two or three of these Expressionators, maybe daisy-chained?

I like the cut of your jib.