extra Fet to ramps 1.4 I've managed to kill 3 fets on D9 somehow, I was extra carefull last time too... so I've given up trying to replace the fet on D9, managed to damage the tracks a little on the ramps trying to get fets off the board now. so want to try adding a fet on a breadboard to another (pref PWM) pin. does RAMPS have pinholes for the other arduino PWM pins? - I see there's a couple of aux pins on the ramps board, but can't find any info on them. https://reprap.org/forum/read.php?219,138744,138744#msg-138744 Wed, 16 Sep 2026 12:09:30 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?219,138744,139203#msg-139203 Re: extra Fet to ramps 1.4 https://reprap.org/forum/read.php?219,138744,139203#msg-139203 why do I want a driver rather than a mosfet and resistor?]]> se5a RAMPS Electronics Fri, 22 Jun 2012 08:07:09 -0400 https://reprap.org/forum/read.php?219,138744,138812#msg-138812 Re: extra Fet to ramps 1.4 https://reprap.org/forum/read.php?219,138744,138812#msg-138812 SevenSwitch is a fine solution for driving DC motors as well. Throttling the motor works, if connected to a PWM pin.

Quote

except I can't really see how to wire it.

It's just two pins you have to connect:



"Signal" is the pin which operates the switch. The more tricky part is to get your firmware operating this pin to your wishes. In Teacup additional devices can be defined like another heater, with or without a thermistor. Not sure about other firmwares.
]]> Traumflug RAMPS Electronics Wed, 20 Jun 2012 06:47:26 -0400 https://reprap.org/forum/read.php?219,138744,138768#msg-138768 Re: extra Fet to ramps 1.4 https://reprap.org/forum/read.php?219,138744,138768#msg-138768

You want to use a DC motor driver board instead of just the mosfet and resistor.

You could use one like [www.pololu.com] for up to 1A (3A peak) loads or something like [www.pololu.com] for 12A (30A peak).]]> Sublime RAMPS Electronics Wed, 20 Jun 2012 00:08:16 -0400 https://reprap.org/forum/read.php?219,138744,138752#msg-138752 Re: extra Fet to ramps 1.4 https://reprap.org/forum/read.php?219,138744,138752#msg-138752
I'm a tad electronicaly stupid.]]> se5a RAMPS Electronics Tue, 19 Jun 2012 20:41:04 -0400 https://reprap.org/forum/read.php?219,138744,138747#msg-138747 Re: extra Fet to ramps 1.4 https://reprap.org/forum/read.php?219,138744,138747#msg-138747 [reprap.org]

if I'm reading that right, I can use the servos as well yes?]]> se5a RAMPS Electronics Tue, 19 Jun 2012 19:55:12 -0400 https://reprap.org/forum/read.php?219,138744,138746#msg-138746 Re: extra Fet to ramps 1.4 https://reprap.org/forum/read.php?219,138744,138746#msg-138746 Sublime RAMPS Electronics Tue, 19 Jun 2012 19:49:49 -0400 https://reprap.org/forum/read.php?219,138744,138744#msg-138744 extra Fet to ramps 1.4 https://reprap.org/forum/read.php?219,138744,138744#msg-138744
so I've given up trying to replace the fet on D9, managed to damage the tracks a little on the ramps trying to get fets off the board now. so want to try adding a fet on a breadboard to another (pref PWM) pin.

does RAMPS have pinholes for the other arduino PWM pins? - I see there's a couple of aux pins on the ramps board, but can't find any info on them.]]> se5a RAMPS Electronics Tue, 19 Jun 2012 19:35:59 -0400