I have a question about Grove EL Driver

soorte · February 15, 2018, 4:32am

Hi.
I have some problem by EL Driver.

When i test, EL wire and grovePI are normal.
But when i connect [EL wire , EL driver , GrovePI], it won’t turn on.

So, I wonder if A is out of order or if there is a problem with compatibility.

The video file in question is located at the link below.
EL Wire Test : https://goo.gl/QAY5fk
EL Wire - EL driver - GrovePI Test : https://goo.gl/WELckj

Thanks for reading

JohnC · February 15, 2018, 8:34pm

You might be browning out the power supply. You are powering this with what size power supply? The power port should be directly connected to the power supply on the Raspberry Pi; if you are underpowering that, you might have a brownout.

Your best solution might be to try powering the Raspberry Pi with a charger battery that supplies 2.5A. Also, can’t tell from the video, but if you are powering this with a computer USB port, you will definitely not be supplying enough power to it.

RobertLucian · February 15, 2018, 8:45pm

Hi @soorte,

Provided you have an adequate power supply, you might also test the voltage you’re getting on that port should you have a multi-meter.

This Grove EL Driver might also have the pins reversed.
InkedGrovePi%20Graphical%20Datasheet

So for instance, if you connect the driver to port D3, then it’s going to use pin number 3 off of the GrovePi board. But you can also use pin number 4 on port D3, but it’s going to be the one following the 4th.
Please look into the hardware diagram I’ve provided.

Thank you!

soorte · March 2, 2018, 6:38am

Um… So I bought a 3A adapter.
But. I still have same problem.

soorte · March 2, 2018, 6:42am

Did I write it wrong by any chance?

from grovepi import *
pinMode(2,“output”)
#pinMode(3,“output”)
digitalWrite(2,1)
digitalWrite(3,1)

RobertLucian · March 2, 2018, 8:11pm

Hi @soorte,

You have to do it like in the following example:

github.com

DexterInd/GrovePi/blob/master/Software/Python/firmware_tests/multi_led_blink.py

#!/usr/bin/env python

# GrovePi LED blink test for the Grove LED Socket (http://www.seeedstudio.com/wiki/Grove_-_LED_Socket_Kit)
#
# The GrovePi connects the Raspberry Pi and Grove sensors.  You can learn more about GrovePi here:  http://www.dexterindustries.com/GrovePi
#
# Have a question about this example?  Ask on the forums here:  http://www.dexterindustries.com/forum/?forum=grovepi
#
'''
## License

The MIT License (MIT)

GrovePi for the Raspberry Pi: an open source platform for connecting Grove Sensors to the Raspberry Pi.
Copyright (C) 2017  Dexter Industries

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

This file has been truncated. show original

And for other basic examples, you can check the following directory in our GrovePi project:

Hope this helps you.

Thank you!

soorte · April 5, 2018, 1:29am

It’s settled.
You can have D 4, D 5, and D 6 ports.
Frankly speaking, I don’t know why these three are the only ones.
I wish someone would let me know.