reprap:electronics:heatbed_mosfet

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reprap:electronics:heatbed_mosfet [2017/09/06 11:51] – [For the signalwire there has been some confusion] sjoukereprap:electronics:heatbed_mosfet [2019/08/11 17:15] (current) – [How to install] sjouke
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 ===== Howto Connect your Hotbed (and or extruder) to a Mosfet ===== ===== Howto Connect your Hotbed (and or extruder) to a Mosfet =====
  
-**IMPORTANT: I have seen people trying to (re-)sell these mosfet units with a HUGE profit on EBAY while referring to this page for installationschematics, go shop around, they don't need to be more expensive than around €5 to €10 ($5 to $10) incl PP.** +**IMPORTANT: I have seen people trying to (re-)sell these Mosfet units with a HUGE profit on EBAY while referring to this page for installation schematics, go shop around, they don't need to be more expensive than around €5 to €10 ($5 to $10) incl PP.** 
  
-[[http://www.banggood.com/10Pcs-Geekcreit-3D-Printer-General-Add-on-Heated-Bed-Power-Expansion-Module-For-Chitu-Motherboard-p-1135020.html?p=2322113070965201511G|Click here for an example of some prices]]+[[https://www.banggood.com/MOSFET-High-Power-Heated-Bed-Expansion-Power-Module-MOS-Tube-for-3D-Printer-Prusa-i3-Anet-A8A6-p-1356434.html?p=2322113070965201511G&custlinkid=456623|Click here for an example of some prices]]
 ===== Why ===== ===== Why =====
 The idea is pretty simple: The high current of the hotbed brings multiple problems to your mainboard.  The idea is pretty simple: The high current of the hotbed brings multiple problems to your mainboard. 
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 {{:reprap:electronics:mosfet.jpg?200|}} {{:reprap:electronics:2pin-jst.jpg?200|}} {{:reprap:electronics:red-black-copper-wire-2x1-5-led-strip-monitor-power-cabl.jpg?200|}} {{:reprap:electronics:mosfet.jpg?200|}} {{:reprap:electronics:2pin-jst.jpg?200|}} {{:reprap:electronics:red-black-copper-wire-2x1-5-led-strip-monitor-power-cabl.jpg?200|}}
    Note: Some mosfets are sold with the signal wire, some without, check if you need to buy a separate one.    Note: Some mosfets are sold with the signal wire, some without, check if you need to buy a separate one.
-[[https://www.aliexpress.com/item/3D-Printer-Parts-General-Add-on-Heated-Bed-Power-Expansion-Module-High-Power-Module-expansion-board/32765683570.html|General Add-on Heated Bed Power Expansion Module on aliexpress.com]] or this [[http://www.banggood.com/Heated-Bed-Power-Expansion-Module-Large-Power-For-3D-Printer-Chitu-Motherboard-p-1133861.html?p=2322113070965201511G|on banggood.com]] or [[http://www.ebay.de/itm/272414319250?_trksid=p2057872.m2749.l2649|on ebay.de]]  +3D-Printer-Parts-General-Add-on-Heated-Bed-Power-Expansion-Module-High-Power-Module-expansion-board[[https://www.banggood.com/MOSFET-High-Power-Heated-Bed-Expansion-Power-Module-MOS-Tube-for-3D-Printer-Prusa-i3-Anet-A8A6-p-1356434.html?p=2322113070965201511G&custlinkid=456623|on banggood.com]]
  
       Question: Can I use a mechanical relays too?       Question: Can I use a mechanical relays too?
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 ===== How to install ===== ===== How to install =====
  
-A special bracket to mount both PCB's you can find here https://www.thingiverse.com/thing:1857006 +A special bracket to mount your ANET mainboard and 1 mosfet unit, you can find here https://www.thingiverse.com/thing:1857006 
- +{{ :reprap:anet:mosfetbracket.jpg?direct&400 |}} 
-   NOTE: More than one version of the ANET controlboard is being shipped from China, always check for + and - (polarity) on the boards. +    
 +   NOTE: More than one version of the ANET controlboard is being shipped from China (with and without version nummers), always check for + and - (polarity) on the boards. 
          * RED   =  +  (on psu marked as +V )           * RED   =  +  (on psu marked as +V ) 
          * BLACK =  -  (on psu marked as -V or COM )          * BLACK =  -  (on psu marked as -V or COM )
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 ====For the signalwire there has been some confusion==== ====For the signalwire there has been some confusion====
  
-some people claim polarity matters **they are right sometimes**......+some people claim polarity matters **they are right sometimes** some mosfets are polarity sensitive.
  
-for the mosfet unit shown in the 2 pictures here, **POLARITY DOES NOT MATTER**, check them side by side with the signal wire connected both ways.+For the mosfet unit shown in the 2 pictures here, **POLARITY DOES NOT MATTER**, check them side by side with the signal wire connected both ways.
  
 In both pictures the hotbed was set to preheat PLA, both led blue (D2) and Red (D1) light up and everything functions as it should. In both pictures the hotbed was set to preheat PLA, both led blue (D2) and Red (D1) light up and everything functions as it should.
-In the photo's below you can see the "bridge-rectifier" on the mosfet, just to the right of the white plug wich corrects "wrong" connection of this wire!+In the photo's below you can see the "bridge-rectifier" on the mosfet (just to the right of the white plug) wich corrects "wrong" connection of this wire!
 {{ :reprap:electronics:20170127_151943.jpg ?400 |}} {{ :reprap:electronics:20170127_151943.jpg ?400 |}}
  
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 ==== Apply a second Mosfet (for the extruder) ==== ==== Apply a second Mosfet (for the extruder) ====
  
-If you decide you want to use a mosfet for your extruder as well, here is a schematic you might find usefull+Eventhough in my opinion it is not really necessary, you might want to decide you want to use a 2nd mosfet for your extruder as well, here is a schematic you might find usefull
  
 {{ :reprap:electronics:2mosfet.jpg ?600 |}} {{ :reprap:electronics:2mosfet.jpg ?600 |}}
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