madbeanpedals::forum

Projects => General Questions => Topic started by: elenore19 on September 18, 2017, 03:30:57 AM

Title: 10v capacitor in a 16v spot?
Post by: elenore19 on September 18, 2017, 03:30:57 AM
All the projects seem to say 16v minimum on the capacitors.
Can I get away with putting two 10V electros in a pedal? (100uf value, Mandroid project)
Title: Re: 10v capacitor in a 16v spot?
Post by: pickdropper on September 18, 2017, 03:54:21 AM
It depends on how much voltage is on the cap at that point in the circuit.  If it's in the power supply and they are seeing 9V, it's not a good idea.
Title: Re: 10v capacitor in a 16v spot?
Post by: elenore19 on September 18, 2017, 04:10:32 AM
How do I find out if that's the case? Or is it not worth the risk in general.
Title: Re: 10v capacitor in a 16v spot?
Post by: WormBoy on September 18, 2017, 09:12:29 AM
Quote from: elenore19 on September 18, 2017, 03:30:57 AM
All the projects seem to say 16v minimum on the capacitors.
Can I get away with putting two 10V electros in a pedal? (100uf value, Mandroid project)
Are you talking about C10 and C11 in the Mandroid? Those two only see a maximum of 3.6V each: the 9V is used in a split manner (it's a bit non-standard, check out the schematic), and the Zener diodes should limit what each cap gets to 3.6V max. So, 10V should be sufficient margin of safety.
Title: Re: 10v capacitor in a 16v spot?
Post by: elenore19 on September 19, 2017, 02:52:43 PM
Quote from: WormBoy on September 18, 2017, 09:12:29 AM
Are you talking about C10 and C11 in the Mandroid? Those two only see a maximum of 3.6V each: the 9V is used in a split manner (it's a bit non-standard, check out the schematic), and the Zener diodes should limit what each cap gets to 3.6V max. So, 10V should be sufficient margin of safety.
Those were the caps I was talking about. Thanks a bunch for the info, hopefully someday I can get the knowledge of figuring that out by myself.

Thanks again!