Questions on starting my build of the OD Special Dumbloid

Tone Chaser

Tone Chaser

New member
Hey Gang, New member here. I'm considering building a OD Special Dumbloid.

I started looking for resistors and capacitors to purchase from Mouser
and unfortunately I'm not savvy at buying these kinds of components.
Some of these parts seem easy to locate but then some you end up finding may have extra alpha numeric combinations added and it is hard to make heads or tails out of what you're actually getting.

Does anyone have a personal bill of materials / receipt of purchased parts for this pedal build that they could share to help me place an order?
Currently I have some Burr Brown Op Amps and others models w sockets, LED's, plenty of knobs. I've picked out some 1590BB2enclosures (probably going to build two).

I also have a question about some pots that I have. I have some really cool Alpha audio100k pots that act as a on and off switch. Thought this would be cool for saving battery power? I noticed in the materials list this pedal uses a B100K for the volume. Would there be a problem if I used the A100K on/off pot instead?

I have some more questions but I'd like to delay them and see if I can come across the answers first.

Thanks in advance for your help!

Josh
 
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Tone Chaser said:
I also have a question about some pots that I have. I have some really cool Alpha audio100k pots that act as a on and off switch. Thought this would be cool for saving battery power? I noticed in the materials list this pedal uses a B100K for the volume. Would there be a problem if I used the A100K on/off pot instead?
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You can do this, in fact A100K is probably better suited for the volume pot.

However, you can also just wire it up so the battery is disconnected when nothing is plugged into the input jack.

Also keep in mind, turning off the effect with the volume knob won't bypass the effect (unless you add relay-based bypass). If the effect is active when you disconnect power it will just go silent until you bypass it with the footswitch.

I rarely buy passive components from Mouser so I'm probably not the best to answer that question.
 
Robert said:
You can do this, in fact A100K is probably better suited for the volume pot.

However, you can also just wire it up so the battery is disconnected when nothing is plugged into the input jack.

Also keep in mind, turning off the effect with the volume knob won't bypass the effect (unless you add relay-based bypass). If the effect is active when you disconnect power it will just go silent until you bypass it with the footswitch.

I rarely buy passive components from Mouser so I'm probably not the best to answer that question.
Click to expand...
Hi Robert, Thanks for your reply!
Well that is good news! :) Can I wire this so I can keep the battery from being drained while keeping it on the pedal board without having to unplug my cable from the input?
 
Yes. You'll need to wire up a separate switch to connect power from the plug to the PCB. If you want a "Power On" LED you'll need to use a DPDT switch, otherwise a SPST switch will work just fine.
 
MichaelW said:
Plenty of room if you built it like this.....
View attachment 98278
Click to expand...
Hi Michael, Very close to what I’m thinking of doing! Thanks for chiming in! I saw your post and just haven’t made my way over to it to post on your thread yet. Sounds and looks great btw!

Can you tell me how to find the resistors for R2,R10 and R15?
R2 100
R10 220
R15 100
There is no designation with a letter for these like the rest of them.

Also
In looking up the other resistors how many watts do these all need to be and will the capacitors need the same wattage as well if that’s a requirement?

IMG_9019.jpeg
 
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BuddytheReow said:
Yes. You'll need to wire up a separate switch to connect power from the plug to the PCB. If you want a "Power On" LED you'll need to use a DPDT switch, otherwise a SPST switch will work just fine.
Click to expand...
I’m sorry I don’t quite understand.
Are you saying that I need to get a different kind of switch being the DPDT style in order to use the on/off volume pot to do what I’d like to do?

Thanks for your post and sorry for the misunderstanding!
 
Tone Chaser said:
Hi Michael, Very close to what I’m thinking of doing! Thanks for chiming in! I saw your post and just haven’t made my way over to it to post on your thread yet. Sounds and looks great btw!

Can you tell me how to find the resistors for R2,R10 and R15?
R2 100
R10 220
R15 100
There is no designation with a letter for these like the rest of them.

Also
In looking up the other resistors how many watts do these all need to be and will the capacitors need the same wattage as well if that’s a requirement?

View attachment 98282
Click to expand...
Ohms
1/4 watt
Regular film caps 5mm spacing, I believe
Electros around 35v but not less than 16v. The higher the voltage the larger the caps are going to be. Check out stompbox parts for accurate representations.
 
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