That relay modules has other components on the input coil side of the relay. You will need to trace out the schematic of the input side of the board. We just need to get to the ends of the relay coil. I think there is a diode on the module so we need to know how it is wired.
Les.

None of that is necessary. A diode is installed across the relay coil and the input uses an optocoupler to provide either a High or Low input signal to activate.

 

@LesJones
@sghioto

if required i can take a photo from the bottom side.

 

Not needed.

 

@sghioto thanks,
can i also use BS250P?

 

@sghioto thanks,
can i also use BS250P?

Yes and I have another version using a PNP 2N3906 transistor.

 

It is easier for you to trace out the schematic of the board with it in front of you than it is for us to do it from pictures.
If I am guessing corectly that the boad is designed to be supplied with 12 volts and the jumper pins change the sense of the input signal that activates the relay then connect the negative input to the negative of your power supply and the positive input to the drain of Q1 mosfet. You will need to select the jumprer position that activates the relay coil when the PWM signal is present. Do not connect anyting to the terminal on the module that is designed to be the input signal.

 

Yes and I have another version using a PNP 2N3906 transistor.
View attachment 335085

@sghioto vou! is it beneficiary to the previous one?

 

Both work the same, no advantage other then the number of parts used.
There are other options depending on the components you have on hand.

 

You will need to select the jumprer position that activates the relay coil when the PWM signal is present.

yes i need to switch jumper to H ie react on 12V on the input CH1

Do not connect anyting to the terminal on the module that is designed to be the input signal.

@LesJones But i dont get that one ... why do not conect anything to that terminal ie CH1?
I though there should be connected port from the @sghioto design ie. 12V Out To relay module?

 

I though there should be connected port from the @sghioto design ie. 12V Out To relay module?

It should, connected like this: Any questions?

 

It should, connected like this: Any questions?

@sghioto yes, precisely - you are WONDERFUL, appreciate all your help and support here.

 

@sghioto hi,
regarding the capacitor is it nF or uF? as nano F doestn have poles? thanks!

 

@sghioto hi,
regarding the capacitor is it nF or uF? as nano F doestn have poles? thanks!

It is nanoFarad, as it says. There are polarized and non-polarized capacitors in both 100nF and 100uF. Depends on the capacitor you pick. If it is polarized, connect it the way shown.

 

@BobTPH and in case its not polarized it doesnt matter?

 

i have the one on the photo ... .can i use that one



or do i have to buy polarized 0.1uF ? thanks

 

The one in the picture in post #35 is OK.

Les.

 

okay so i connected it all,
and even the pwm switch is off; the relay is automatically ON.

and even i turn on pwn switch it does nothing relay is still on.

any idea?


Also i connected together Neg on capacitor + neg on relay + neg on PSU together.

 

any idea?

Sure it's connected correctly with the correct components?
Post a photo of the circuit and how it's connected to the LED strip, please.

 

Looks like the BS250 is installed backwards.

 

@sghioto
please take a look:
https://cloudph1.duckdns.org/index.php/s/WpSLfZLFFogQySs

the orange / blue are goes to PSU where is LED Strip is also connected

blue - To relay control input

green - goes to negative pole on LED stripe


I have bs250p - https://www.diodes.com/assets/Datasheets/BS250P.pdf