3D Printer Reprap Ramps 1.4 RRD Fan Expansion Module 3D Printer Fan Module

Product Features Maximum 20V 2 (PWM controllable) channel (D6 / D11) 0.5A maximum per channel (large enough fan) Flexible Output Voltage (You can connect the RRD-FAN-EXTENDER to 12V, 5V, ... to support the output voltage you need) Each channel has a flyback diode product description If you use the DUAL-EXTRUSION (2 extruder) with heated bed to generate or upgrade the printer, all output ports (D8, D9, D10) will be used. In this case, you can not connect the firmware-controlled FAN directly to the RAMPS board. However, there is already an option in the Sprinter / Marlin firmware (Marlin: BOARD = 34) to redirect FAN to RAMPS output D4. But this solution requires a "buffer / driver" to work. RRD-FAN-EXTENDER is exactly what you need in this situation. This is a plug-and-play solution to install the FAN for DUAL-EXTRUSION setting with RAMPS1.4. However, instead of adding only one output port, the RRD-FAN-EXTENDER is equipped with two PWM control channels (D6 / D11). The second channel can be used for another fan (for example, to cool a stepper drive) or add light control (for example, to add a dimmable LED to your machine). Features: Maximum 20V 2. 2 (PWM control) channel (D6 / D11) 3. Maximum 0.5A per channel (enough for a real big fan) 4. Flexible Output Voltage (You can connect the RRD-FAN-EXTENDER 12V, 5V, ... to support the output voltage you need) 5. Each channel has a flyback diode Easy to set up (plug and play) 7. Marlin firmware already supported (select #define MOTHERBOARD 34) 8. Easy to adapt to other firmware