Octagon: Magic Carpet Ride

[Chuck D. Bones]

I finally finished my Octagon. I add two features: a toggle switch to select between the internal FV-1 programs or the EEPROM and an expression pedal jack & select switch (white knob). The expression pedal can override any one of the three CONTROL knobs, or none of them. Some very cool sounds in this box. I want to thank K Pedals for guidance & encouragement with my initial foray into acrylic pouring.



All wired up and getting tested prior to painting. Worked from the git-go, no troubleshooting req'd! That 1K CC resistor hanging in the air is for short-circuit protection on the 3.3V expression pedal bias.


Fit check prior to final wiring. I had tried to fit this into a 125B, but no dice.





Input & Expression pedal jacks.

 

[Nostradoomus]

The multicoloured knobs really shine on this one, Chuck! Fantastic.

 

[Barry]

That looks incredible!

 

[chongmagic]

Awesome work, love the design and super cool mods!

 

[eaglehat]

Loving that paint job!

 

[p_wats]

Very nice! Looks great. I would love to add an expression jack to my next one.

 

[Mourguitars]

Far out man , very groovy looking CDB !

I knew you couldn't do a pedal un modded , awesome build Chuck !

After reading magic carpet ride ...ill never get that song out of my head today...lol

Mike

 

[Chuck D. Bones]

I know, it's like I can't help myself.

 

[K Pedals]

I finally finished my Octagon. I add two features: a toggle switch to select between the internal FV-1 programs or the EEPROM and an expression pedal jack & select switch (white knob). The expression pedal can override any one of the three CONTROL knobs, or none of them. Some very cool sounds in this box. I want to thank K Pedals for guidance & encouragement with my initial foray into acrylic pouring.

View attachment 2638

All wired up and getting tested prior to painting. Worked from the git-go, no troubleshooting req'd! That 1K CC resistor haning in the air is for short-circuit protection on the 3.3V expression pedal bias.
View attachment 2639

Fit check prior to final wiring. I had tried to fit this into a 125B, but no dice.
View attachment 2640


View attachment 2641

Input & Expression pedal jacks.
View attachment 2642


View attachment 2643

Amazing work man!!!
Inside and out!!!

 

[Boba7]

That 1K CC resistor hanging in the air is for short-circuit protection on the 3.3V expression pedal bias.

Hi Chuck! I don't think I understand how you used the 1k resistor.
You're just connecting/disconnecting lug 2 of the pots with the stereo jack right? Then another lug is ground, and the other 3.3v?

 

[Chuck D. Bones]

Lug 2 of the three CONTROL pots are connected to or disconnected from the Expression jack by the 4 position rotary switch. The 1K resistor is in series with the 3.3V supply in case I accidentally plug the wrong thing into the Expression jack and short the 3.3V to ground.

 

[Boba7]

Great, thanks! Great idea!

 

[dlazzarini]

I finally finished my Octagon. I add two features: a toggle switch to select between the internal FV-1 programs or the EEPROM and an expression pedal jack & select switch (white knob). The expression pedal can override any one of the three CONTROL knobs, or none of them. Some very cool sounds in this box. I want to thank K Pedals for guidance & encouragement with my initial foray into acrylic pouring.

View attachment 2638

All wired up and getting tested prior to painting. Worked from the git-go, no troubleshooting req'd! That 1K CC resistor hanging in the air is for short-circuit protection on the 3.3V expression pedal bias.
View attachment 2639

Fit check prior to final wiring. I had tried to fit this into a 125B, but no dice.
View attachment 2640


View attachment 2641

Input & Expression pedal jacks.
View attachment 2642


View attachment 2643

That looks sick!!!!

 

[HamishR]

So Barbarella.