ESP8266 Community Forum

- Wed Sep 05, 2018 10:32 pm #78102 Hello, good afternoon for everyone, I would like to make a request. From already thank you very much.
I'm trying to use a relay module 8 channels to power lighting and a TV.

In the connection I am using:
-Modulo wifi nodemcu lua v2 esp8266 esp-12e
-8 Channel Relay Module 5v 10a With Opto Arduino Coupler
-Logic converter i2c 5-3.3v 4ch bidirectional arduino

Once the connection shown below I find that it does not work, please can you help me solve it with some other scheme,
thank you very much.
A cordial greeting.

<a href="http://picasion.com/"><img src="http://i.picasion.com/pic88/b7f1de2faca9f474660346c18061ded3.gif" width="300" height="168" border="0" alt="http://picasion.com/" /></a><br /><a href="http://picasion.com/">http://picasion.com/</a>

- Fri Sep 07, 2018 3:14 am #78128 You need to supply more details on

Which relay module you are using
Which level converter you are using
How you have them connected.

Note that a lot of level converters only provide a fairly high value pull up (10K) on the +5V side which will limit the amount of drive current available for the relay opto-coupled inputs and this may be insufficient to trigger them. It may be possible to remedy this by lowering the value of the pull up by putting a resistor in parallel.