Hi guys,
I wanted to let you know about a fan expansion board I’ve developed for RAMPS. It’s a really basic / simple board, it adds two extra MOSFET outputs to RAMPS to allow for control of a few extra fans.
![240px-TinyFanTop.jpg]( "240px-TinyFanTop.jpg")
![240px-TinyFanBottom.jpg]( "240px-TinyFanBottom.jpg")
It’s basically equivalent to the RepRap Discount Fan Extender that’s been floating around out there, but seeing as I couldn’t find the source for it I thought an open-source solution would be handy. All source schematic / PCB / gerber files are available on GitHub under a GPL V3 license.
Here are the details for these boards – nothing too fancy, but they’re really handy if you’re out of MOSFETS:
I tried to make these boards as plug-and-play as possible. They plug straight onto RAMPS, and accept power through a screw-terminal – the idea being that you can run short wires from the input terminal to the RAMPS main power screw terminals, making setup straightforward – no need to solder anything (unless you want to, of course!).
The fairly high current capacity means these boards could also be useable for things other than fans – LED strips, or even a small heating element. I successfully tested a board running a 12V 40W ceramic cartridge heater without running into any problems – although RAMPS’s default MOSFETs are probably a better choice!
Fan control is through pins D6 / D11, firmware configuration is the same as the RRD board – I’ve written up details about setting up the firmware, along with a bunch of other info, here.
I’ve got these boards available for sale on Aus3D if anyone wants to grab one. Anyone who wants to make their own board is more than welcome to, whether it be for personal or commercial use.
Links:
TinyFan Wiki Page
TinyFan GitHub Page
I wanted to let you know about a fan expansion board I’ve developed for RAMPS. It’s a really basic / simple board, it adds two extra MOSFET outputs to RAMPS to allow for control of a few extra fans.
It’s basically equivalent to the RepRap Discount Fan Extender that’s been floating around out there, but seeing as I couldn’t find the source for it I thought an open-source solution would be handy. All source schematic / PCB / gerber files are available on GitHub under a GPL V3 license.
Here are the details for these boards – nothing too fancy, but they’re really handy if you’re out of MOSFETS:
- 2 PWM Controllable Channels (D6 and D11 on RAMPS)
- Vin: 5-25V
- Max. Current: 3.5A / channel
- Flyback diode on each channel
- Indicator LED for each channel
- Dimensions: 15.5x15.5mm
I tried to make these boards as plug-and-play as possible. They plug straight onto RAMPS, and accept power through a screw-terminal – the idea being that you can run short wires from the input terminal to the RAMPS main power screw terminals, making setup straightforward – no need to solder anything (unless you want to, of course!).
The fairly high current capacity means these boards could also be useable for things other than fans – LED strips, or even a small heating element. I successfully tested a board running a 12V 40W ceramic cartridge heater without running into any problems – although RAMPS’s default MOSFETs are probably a better choice!
Fan control is through pins D6 / D11, firmware configuration is the same as the RRD board – I’ve written up details about setting up the firmware, along with a bunch of other info, here.
I’ve got these boards available for sale on Aus3D if anyone wants to grab one. Anyone who wants to make their own board is more than welcome to, whether it be for personal or commercial use.
Links:
TinyFan Wiki Page
TinyFan GitHub Page