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Relay Bypass Microcontroller code / open source?

Started by LaceSensor, July 26, 2025, 07:47:54 PM

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LaceSensor

HI

I am thinking about implementing relay bypass in the future.
I think some of the flexi switching ala EQD is pretty cool. However, I have no skills in coding to design something like that, let alone burn it to chips somehow.

Does anyone sell just the chips (not the surrounding parts or relays) but droppable into a suitable schematic? Even something simpler with effective debounce would be a start.

I know that there are options but I just want to uC so I can do my own PCB design and integrate it properly. Thanks!

jimilee

The programmable chips? I know mouser does.


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Pedal building is like the opposite of sex.  All the fun stuff happens before you get in the box.

LaceSensor


jessenator

#3
I'm not sure of any entity who has them pre programmed. A couple of members here have the PIC prog tool, and if you hunt them down they might could work something out with you.

I suppose you could also reach out to Robert over at pedal pcb if he'd sell you bulk, but nothing ventured...

I'm guessing you'd also like something your side of the pond?
"All you need is fuzz"   ~not Lennon

LaceSensor

Quote from: jessenator on July 26, 2025, 09:14:59 PMI'm not sure of any entity who has them pre programmed. A couple of members here have the PIC prog tool, and if you hunt them down they might could work something out with you.

I suppose you could also reach out to Robert over at pedal pcb if he'd sell you bulk, but nothing ventured...

I'm guessing you'd also like something your side of the pond?

I had considered speaking to pedal pcb as their product looks good in terms of features. I might have to buy one to test first of course.

Location of vendor isnt critical.

Id love to do it myself I just feel like the learning curve is super steep, and if someone who was already burning chips would sell a bunch id like to take advantage of that, without it being a $12 kit or something with a PCB that I dont need/want

jessenator

gvmnt_lacky I know for sure has a PICkit.

https://www.madbeanpedals.com/forum/index.php?topic=35153.msg335220#msg335220

By all accounts of you have Windows it's terribly easy with said PICkit.
"All you need is fuzz"   ~not Lennon

jimilee

Quote from: LaceSensor on July 26, 2025, 11:05:46 PM
Quote from: jessenator on July 26, 2025, 09:14:59 PMI'm not sure of any entity who has them pre programmed. A couple of members here have the PIC prog tool, and if you hunt them down they might could work something out with you.

I suppose you could also reach out to Robert over at pedal pcb if he'd sell you bulk, but nothing ventured...

I'm guessing you'd also like something your side of the pond?

I had considered speaking to pedal pcb as their product looks good in terms of features. I might have to buy one to test first of course.

Location of vendor isnt critical.

Id love to do it myself I just feel like the learning curve is super steep, and if someone who was already burning chips would sell a bunch id like to take advantage of that, without it being a $12 kit or something with a PCB that I dont need/want
Brian makes them, too. There isn't really a one size fits all kind of solution. They're all a little different. Peter at VFE was able to raise money to buy the code for his, so you may be able to get it from Brian. The Pick it units are pretty cheap. I bought one with the intention of making some. It's on the shelf with other things I just had to have.


Sent from my iPhone using Tapatalk
Pedal building is like the opposite of sex.  All the fun stuff happens before you get in the box.

LaceSensor

I think I have a great solution here, the VFe Hex code and Microchiop direct to burn them.

Cheers all!

jimilee

Couldn't have said it better myself.


Sent from my iPhone using Tapatalk
Pedal building is like the opposite of sex.  All the fun stuff happens before you get in the box.

jessenator

Related, but using the vfe code would necessitate using the vfe schematic, yes? 

Microcontrollers are not my wheelhouse really. I just buy the board, relay, PIC combo  because it all works.

Are there only elements of the bypass board circuitry that rely on it, or do they just interact with the relay directly? 

Looking at the vfe vs Robert's there's s definite difference, so maybe I've just answered my own question lol
"All you need is fuzz"   ~not Lennon

jimilee

Quote from: jessenator on July 28, 2025, 03:22:19 PMRelated, but using the vfe code would necessitate using the vfe schematic, yes?

Microcontrollers are not my wheelhouse really. I just buy the board, relay, PIC combo  because it all works.

Are there only elements of the bypass board circuitry that rely on it, or do they just interact with the relay directly?

Looking at the vfe vs Robert's there's s definite difference, so maybe I've just answered my own question lol


Parts of the circuit, yes, I'm sure. But if he has the code, he can tailor the size pf the board, etc, to fit his needs. Lace is a pretty sharp guy, he traced all the love tone stuff, he has some great boards. I'm not sure if he sells them anymore, though. :(
Pedal building is like the opposite of sex.  All the fun stuff happens before you get in the box.

LaceSensor

Quote from: jessenator on July 28, 2025, 03:22:19 PMRelated, but using the vfe code would necessitate using the vfe schematic, yes?

Microcontrollers are not my wheelhouse really. I just buy the board, relay, PIC combo  because it all works.

Are there only elements of the bypass board circuitry that rely on it, or do they just interact with the relay directly?

Looking at the vfe vs Robert's there's s definite difference, so maybe I've just answered my own question lol

I beleive that yes you need to follow the schematic as the wrap around parts are involved in how the bypass and/or LED illumination states work.

I have reached out to PedalPCB with no reply.

There are a lot of parts to the VFe bypass, some which seem hard to get hold of (J175 thru hole anyone?) but I image SMD options exist, or workalikes.


jessenator

Quote from: LaceSensor on July 28, 2025, 10:42:15 PMVFe
Quote from: LaceSensor on July 28, 2025, 10:42:15 PMsome which seem hard to get hold of
Literally why I sold on my Choral Reef. I respect the hustle, but reject the grind of the guy.


Gotcha, yeah makes sense one would need to follow the schematic. I think if I can get a 555 non-PIC version working and without noise then that's what I'll use.
"All you need is fuzz"   ~not Lennon

Bio77

+1 on the 555 switching, It's fast and you don't need the MC.  The only downside is I used the non-latching, which draws a lot of current. There is a latching version that I haven't tried.  https://www.pedalpcb.com/product/pcb394/

I layed out the CODA relay switch and made PCBs.  I programmed the MCs with the PICkit2.  I think the 555 works better.   

My other preferred option is the Intelligent Relay with attiny chip from PPCB.  The momentary function is super useful for playing live.