PedalPCB Paragon - Electrolytic Capacitor Voltage Rating?

[Macca]

Hi everyone,

I am gathering parts for a Paragon build. I know that the circuit intakes 9v and uses the onboard charge pump to raise it to 18v.

As a result, do my electrolytic capacitors need to be rated 25V in order to prevent any damage? I originally thought 16v would be fine but now I’m not sure.

Thanks!

 

[PapaBear]

I use 35V or 50V personally

 

[Macca]

I use 35V or 50V personally

Thanks! Assuming this means I have to respect 18v inside the circuit, whether it be capacitors rated at 25v or higher?

 

[PapaBear]

Aproximately twice the voltage is what's generally recommended

 

[Macca]

Aproximately twice the voltage is what's generally recommended

Thanks again for your help. I take it this means I need to respect the charge pump’s increase to 18v when selecting parts and not 9v?

 

[BuddytheReow]

Correct. You will be fine with 25v or more

 

[Macca]

Correct. You will be fine with 25v or more

Thanks. Off to (re)buy some parts.

 

[Grubb]

Note for helping someone else avoid future frustration: it's really hard to fit an 8mm 100uF electro cap in this build, and Tayda doesn't stock a 5mm cap with an appropriate voltage rating. I'm ordering a 6mm 35v 100uF capacitor which will hopefully solve the problem and still fit.

I love building pedals but I can't wait for the day I actually order ALL of the parts I need correctly in one go

 

[giovanni]

Does the high voltage rating apply to all caps? Should be just the filtering caps, not coupling ones, correct?

 

[fig]

Does the high voltage rating apply to all caps? Should be just the filtering caps, not coupling ones, correct?

Correct. Only anything getting hit with 18v.