Hi all, I am looking for a simple schema for a mosfet based heater that can be used with the PID library.. Who can help me out?? quoted from Triffid_Hunter 'I use the IRL3803 for my heater, much simpler than this- arduino pin -> gate, gnd -> source, heater -> drain.. no other parts needed' Is this workable and can it be used with PID and does PID exist in the firmware, I forgot to check this.. Right now I am having a heater schema with a relay and this is on or off and the temperature goes up and down by 20-25 degrees celcius..I guess this doesn't do any good in stable printing.. So please help me out :-) With kind regards and thanks in advance !! Michael with kind regards.. https://reprap.org/forum/read.php?13,44425,44425#msg-44425 Tue, 21 Jul 2026 15:33:02 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?13,44425,44726#msg-44726 https://reprap.org/forum/read.php?13,44425,44726#msg-44726 Triffid_Hunter Controllers Thu, 06 May 2010 01:33:18 -0400 https://reprap.org/forum/read.php?13,44425,44678#msg-44678 https://reprap.org/forum/read.php?13,44425,44678#msg-44678
If you are talking about a heated build platform, the Extruder Controller also implements the PID loop for that but the "A" output of the extruder controller board is a binary (0/1) output so it turns ON for values of 128 or more and OFF for values below 128. I find it tends to settle at 2 or 3 degrees below the setpoint.

There is probably a PID library (or several) for Arduino. The hard part is tuning the parameters.]]> JohnWasser Controllers Wed, 05 May 2010 15:54:03 -0400 https://reprap.org/forum/read.php?13,44425,44434#msg-44434 https://reprap.org/forum/read.php?13,44425,44434#msg-44434 -------------------------------------------------------
> Right now I am having a heater schema with a relay
> and this is on or off and the temperature goes up
> and down by 20-25 degrees celcius..I guess this
> doesn't do any good in stable printing..
>
>
> So please help me out :-)
>
>
> With kind regards and thanks in advance !!
>
> Michael
>
>
>
> with kind regards..


This is probably due to a combination of the mechanism used in the software to enable and disable relay and the thermal mass of the heater head.

Basically you need it switching faster.]]> annodomini2 Controllers Sun, 02 May 2010 19:48:51 -0400 https://reprap.org/forum/read.php?13,44425,44428#msg-44428 https://reprap.org/forum/read.php?13,44425,44428#msg-44428 objects.reprap.org]]]> nophead Controllers Sun, 02 May 2010 19:10:11 -0400 https://reprap.org/forum/read.php?13,44425,44425#msg-44425 https://reprap.org/forum/read.php?13,44425,44425#msg-44425
I am looking for a simple schema for a mosfet based heater that can be used with the PID library..

Who can help me out??


quoted from Triffid_Hunter
'I use the IRL3803 for my heater, much simpler than this- arduino pin -> gate, gnd -> source, heater -> drain.. no other parts needed'

Is this workable and can it be used with PID and does PID exist in the firmware, I forgot to check this..


Right now I am having a heater schema with a relay and this is on or off and the temperature goes up and down by 20-25 degrees celcius..I guess this doesn't do any good in stable printing..


So please help me out :-)


With kind regards and thanks in advance !!

Michael



with kind regards..]]> mhensen Controllers Sun, 02 May 2010 18:19:40 -0400