If you need a third extruder with thermocouple sensor for Megatronics v2, a second for Megatronics v1 or one for your RAMPS, you can use this board. Actually, it can be hooked up with any electronics, as long as you have a free analog input.
Features: - Easy to install - Very small design (24x28mm) - Compatible with Megatronics and RAMPS.
For more information on installing and configuration, see the wiki http://reprap.org/wiki/ExtThermoCouple_1.0
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