Go Down

Topic: relay JD-VCC connection (Read 8033 times) previous topic - next topic

FranticKid

Pic of relay module is attached below, it has only one GND

As i want to use a separate power supply of 5V,  i connected separate supply's +Ve terminal to JD-Vcc  and -Ve terminal to  "GND-IN1-IN2-IN3-IN4-Vcc"'s   GND of relay module.... and connected Arduino's 5V to "GND-IN1-IN2-IN3-IN4-Vcc"'s Vcc...  does this connection make the relay optically isolated?????

larryd

#1
Apr 13, 2017, 05:52 am Last Edit: Apr 13, 2017, 05:55 am by LarryD


Would be similar to this four relay board.




.
No technical PMs.
The last thing you did is where you should start looking.

756E6C

#2
Apr 13, 2017, 06:04 am Last Edit: Apr 13, 2017, 07:27 am by 756E6C
Try this, 5V of course: graphic by @dlloyd.

FranticKid

756E6C bro,
the module i'm using doesnt have 2 GNDs... only 1 GND... only 2 pin header (JD-Vcc, Vcc)..

larryd

#4
Apr 13, 2017, 06:13 am Last Edit: Apr 13, 2017, 06:14 am by LarryD
From dlloyd




.
No technical PMs.
The last thing you did is where you should start looking.

FranticKid

LarryD
so u r telling me everything's ok with my connection???

FranticKid


larryd

If you are wired as in post 4, you have opto isolation.


.
No technical PMs.
The last thing you did is where you should start looking.

terryking228

#8
Apr 13, 2017, 04:57 pm Last Edit: Apr 13, 2017, 04:58 pm by terryking228
Hi,
Larry's right: Post 4 in the right way. NO connection to Arduino GND..

Some more information about all this HERE

The circuit and the isolation barrier look like this:
Regards, Terry King terry@yourduino.com  - Check great prices, devices and Arduino-related boards at http://YourDuino.com
HOW-TO: http://ArduinoInfo.Info

Wawa

@terryking228

I think that diagram should be modified to make things clear.
The two VCCs (opto and jumper) need to be connected, since they are on the board.
Then the isolation barrier needs to be re-drawn throught the jumper.
Leo..

terryking228

@Wawa, Good Idea! How is this??


Regards, Terry King terry@yourduino.com  - Check great prices, devices and Arduino-related boards at http://YourDuino.com
HOW-TO: http://ArduinoInfo.Info

Wawa


Go Up