reprap:electronics:heatbed_mosfet

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reprap:electronics:heatbed_mosfet [2017/07/04 08:21] – [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 , for clarification i have taken a picture showing for the mosfet unit in the pictures here **POLARITY DOES NOT MATTER**.+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.
  
-   Check the 2 pictures 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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