when i change to Fan3 there work's normaly

it's nothing big just one small 5Vdc relay connected directly to fan8 output
and then this relay control 12v DC led light

Hello

i connect my small Dc Relay for controling led light in my printer. And when i send

M42 P7 S1 

then voltage is 1.69V and when i send S0 then voltage is almost 5V
but when i connect my relay he won't switch, what can be wrong?

and this is my Config code for pin on Duex

;LED LIGHT SYSTEM
M950 P7 C"duex.fan8"

Yes i got it from one man on Fb. He share picture on one FB site and i ask him if i can have and he send me code so that now i have one camera on top of another camera.
I don't have any picture with me when i will come home i will take one and posted

Hello i have interface with two camera. and now i would like to know what will happend if i update my firmware.
Do i will keep this two camera or i will have only one camera widget?

@deckingman no worry

@deckingman Yeah i know but which of to is gnd and which vcc on output for heater 1

hello @dc42 i add diode already where can i find all connector name

And which is gnd and vcc pin or how i need to connect Motor to heater pin

Hello will this code work that i will be able to connect berdair pump to heater 1 pin's?
my 4 heater are all connected to duex board so i have bouth Heater on duet2wifi free

; Part cooling fan
M950 H1 C"nil" ; disable heater 1 and free up the associated pin
M950 F9 C"heater1" Q0; Fan 9 is connected to heater 1 pin, PWM at 100Hz   
M106 P9 S1  

i have H1 heater sign to duex.e2heat
so i need to sign new heater and then disable pin or how i could manage that?
and what i need to do that i will see fan on dashboard?

Matej

i have that version of board Duet 2 Wifi Electronic Controller Card V1.04