Decoupling capacitors? I just had a look at the schematic and board layout after chatting to someone on IRC about ramps, and something that jumped out at me is a dearth of decoupling capacitors! On my board, I have a 100nF between 12v/gnd, and also 5v/gnd of every pololu, one across the arduino connector, across all the power connectors, and a few others for good measure to keep the noise down. Ramps seems to only have the one 100nF! Existing boards could probably add them by getting 0805 or 0603 SMT parts and soldering them between relevant pins. Will future generations of the RAMPS boards have any more decoupling, or is there not enough room? https://reprap.org/forum/read.php?219,87502,87502#msg-87502 Mon, 05 Oct 2026 20:40:54 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?219,87502,87801#msg-87801 Re: Decoupling capacitors? https://reprap.org/forum/read.php?219,87502,87801#msg-87801 Triffid_Hunter RAMPS Electronics Mon, 20 Jun 2011 18:21:30 -0400 https://reprap.org/forum/read.php?219,87502,87796#msg-87796 Re: Decoupling capacitors? https://reprap.org/forum/read.php?219,87502,87796#msg-87796
i have wondered if anyone has seen anything new like the pololu drivers that could handle a little more power out there yet.]]> dissidence RAMPS Electronics Mon, 20 Jun 2011 17:53:00 -0400 https://reprap.org/forum/read.php?219,87502,87553#msg-87553 Re: Decoupling capacitors? https://reprap.org/forum/read.php?219,87502,87553#msg-87553 nophead RAMPS Electronics Sat, 18 Jun 2011 16:24:56 -0400 https://reprap.org/forum/read.php?219,87502,87502#msg-87502 Decoupling capacitors? https://reprap.org/forum/read.php?219,87502,87502#msg-87502
On my board, I have a 100nF between 12v/gnd, and also 5v/gnd of every pololu, one across the arduino connector, across all the power connectors, and a few others for good measure to keep the noise down.

Ramps seems to only have the one 100nF!

Existing boards could probably add them by getting 0805 or 0603 SMT parts and soldering them between relevant pins.

Will future generations of the RAMPS boards have any more decoupling, or is there not enough room?]]> Triffid_Hunter RAMPS Electronics Fri, 17 Jun 2011 22:53:51 -0400