i trying to put a dual extruder on my prusa i3 , but my ramps 1.4 doesnt support it ( becuase only 5 motor driver ). can anyone recomment a electric board for dual extruder or maybe 2 dual extruder on my prusa i3 ?

RAMPS means to support 2 extruders. 3 drivers for each geometrical axis (both Z motors onto the same driver), 2 drivers for extruders.

---

Generation 7 Electronics	Teacup Firmware	RepRap DIY

Hello,
Maybe ddock thinks about this solution?
dual x- carriages: [www.thingiverse.com]

I am working on similar approach for prusa mendel - small details here: [www.thingiverse.com], but I plan on creating topic on forum to track progress.
Currently building second prusa for tests and I will use RAMPS 1.4 and use additional I/O pins to connect to motor driver like buildbob did.