Hi at all. On this board how many mA can I request on ADC pins? For example,if I wanna put a rgb led stripe on adc1 adc2 and adc3,how many power can i request max without broke the board? https://reprap.org/forum/read.php?13,846943,846943#msg-846943 Sat, 17 Oct 2026 02:20:47 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?13,846943,847061#msg-847061 https://reprap.org/forum/read.php?13,846943,847061#msg-847061 zonalimitatore Controllers Fri, 15 Feb 2019 05:07:49 -0500 https://reprap.org/forum/read.php?13,846943,847057#msg-847057 https://reprap.org/forum/read.php?13,846943,847057#msg-847057 www.geeetech.com]
there are only 15 pwm capable pins on the controller, they are used as follows

D2 (OC3B ) HEATER_0_PIN
D3 (OC3C ) HEATER_1_PIN
D4 (OC0B ) HEATER_BED_PIN
D5 (OC3A ) LCD_PINS_D6*
D6 (OC4A ) LCD_PINS_D7*
D7 (OC4B ) FAN_PIN
D8 (OC4C )
D9 (OC2B )
D10 (OC2A )
D11 (OC1A ) used by bltouch servo
D12 (OC1B ) PS_ON_PIN
D13 (OC0A ) LED_PIN
D44 (OC5C )
D45 (OC5B ) E0_DIR_PIN
D46 (OC5A )

*DEPENDS WHAT LCD YOU HAVE

So you have to find the pins that you are not using and add NPN mosfets to those pins...
Since some of the are not connected to anything, you will probably have to wire to the legs of the microprocessor]]> Dust Controllers Fri, 15 Feb 2019 04:43:44 -0500 https://reprap.org/forum/read.php?13,846943,847048#msg-847048 https://reprap.org/forum/read.php?13,846943,847048#msg-847048
+v
R
G
B

so they are common +v, you gnd the R or G or B line to turn it on.]]> Dust Controllers Fri, 15 Feb 2019 03:43:03 -0500 https://reprap.org/forum/read.php?13,846943,847047#msg-847047 https://reprap.org/forum/read.php?13,846943,847047#msg-847047 Ah.....ground is common right?]]> zonalimitatore Controllers Fri, 15 Feb 2019 03:32:52 -0500 https://reprap.org/forum/read.php?13,846943,847034#msg-847034 https://reprap.org/forum/read.php?13,846943,847034#msg-847034

you have not mentioned what you are trying to do...


marlin has some support for RGB_LED which activates the m150 gcode that lets you set any color from gcode

but looking at your controller. It doesn't break out any unused pins... so your unable to add any rgb easily]]> Dust Controllers Thu, 14 Feb 2019 20:28:25 -0500 https://reprap.org/forum/read.php?13,846943,846996#msg-846996 https://reprap.org/forum/read.php?13,846943,846996#msg-846996 zonalimitatore Controllers Thu, 14 Feb 2019 12:54:17 -0500 https://reprap.org/forum/read.php?13,846943,846993#msg-846993 https://reprap.org/forum/read.php?13,846943,846993#msg-846993 VDX Controllers Thu, 14 Feb 2019 12:41:20 -0500 https://reprap.org/forum/read.php?13,846943,846990#msg-846990 https://reprap.org/forum/read.php?13,846943,846990#msg-846990 So i need 3 pwm capable pins under mosfet?
I think i haven't :D

Think i move to control a white led under "light pin" (pwm capale ap2306agn) but i don't know how many current i can request! (i find it max 5A)

So you tell me that a rgb required cpu cycles?]]> zonalimitatore Controllers Thu, 14 Feb 2019 12:25:54 -0500 https://reprap.org/forum/read.php?13,846943,846958#msg-846958 https://reprap.org/forum/read.php?13,846943,846958#msg-846958
controlling 12v rgb strips via mosfet on arduino pwm pins is common. 5v less so but other than the power supply identical concept
You do need to use pwm capable pins, or your limited to just on and off (or wasting lots of cpu cycles, which is no a good idea on a 3d printer controller)
simple RGB strips require 3 mosfet, one for red, one for green and one for blue.

see [learn.adafruit.com]

now there are quite a few different types of RGB strips. some of them are smart, and just applying power to them will not work.]]> Dust Controllers Thu, 14 Feb 2019 02:31:28 -0500 https://reprap.org/forum/read.php?13,846943,846957#msg-846957 https://reprap.org/forum/read.php?13,846943,846957#msg-846957 If I use a mosfet? Like extruder slot (empty) can be ok?]]> zonalimitatore Controllers Thu, 14 Feb 2019 01:41:10 -0500 https://reprap.org/forum/read.php?13,846943,846944#msg-846944 https://reprap.org/forum/read.php?13,846943,846944#msg-846944
You can use something like the ULN2003 (7x darlington drivers) for PWM or OpAmps for anlogue output ...]]> VDX Controllers Wed, 13 Feb 2019 19:15:43 -0500 https://reprap.org/forum/read.php?13,846943,846943#msg-846943 https://reprap.org/forum/read.php?13,846943,846943#msg-846943 On this board how many mA can I request on ADC pins?
For example,if I wanna put a rgb led stripe on adc1 adc2 and adc3,how many power can i request max without broke the board?]]> zonalimitatore Controllers Wed, 13 Feb 2019 18:28:58 -0500