Comments on: Arduino GY-MAX471 Voltage and Current Testing Module https://kevingulling.com/2017/03/arduino-gy-max471-voltage-and-current-testing-module/ Game Development, VR, and more Sun, 21 Apr 2019 20:54:54 +0000 hourly 1 https://wordpress.org/?v=5.9.13 By: Perry https://kevingulling.com/2017/03/arduino-gy-max471-voltage-and-current-testing-module/#comment-50851 Sun, 21 Apr 2019 20:54:54 +0000 https://kevingulling.com/?p=1543#comment-50851 Kevin, Can you post schematic so I can see where/ow you connected pin 5 for current.

]]> By: Mike https://kevingulling.com/2017/03/arduino-gy-max471-voltage-and-current-testing-module/#comment-17082 Thu, 21 Dec 2017 22:35:15 +0000 https://kevingulling.com/?p=1543#comment-17082 In reply to Thierry.

Is this the reason why my current (A) readings are off by 10mA?

I get 14mA on my ammeter and the max471 is giving me 4.8mA. My power is 5v and my load is an LED with a 220ohm resistor. Voltage across the led is 2v, 3v across resistor.

]]> By: Frank Lampard https://kevingulling.com/2017/03/arduino-gy-max471-voltage-and-current-testing-module/#comment-16799 Mon, 11 Dec 2017 11:54:47 +0000 https://kevingulling.com/?p=1543#comment-16799 Great article post for current testing module. I really enjoyed reading this blog post. Very useful information and informative post. I love this blog! It’s fantastic!
Thanks for sharing!!!!!!

]]> By: keving https://kevingulling.com/2017/03/arduino-gy-max471-voltage-and-current-testing-module/#comment-14121 Sun, 27 Aug 2017 17:53:30 +0000 https://kevingulling.com/?p=1543#comment-14121 In reply to Thierry.

Thanks for sharing!

]]> By: Thierry https://kevingulling.com/2017/03/arduino-gy-max471-voltage-and-current-testing-module/#comment-13243 Sat, 22 Jul 2017 17:18:35 +0000 https://kevingulling.com/?p=1543#comment-13243 There is a 2K resistor between GND and OUT

]]> By: Thierry https://kevingulling.com/2017/03/arduino-gy-max471-voltage-and-current-testing-module/#comment-13182 Tue, 18 Jul 2017 20:15:51 +0000 https://kevingulling.com/?p=1543#comment-13182 Yes sure, datasheet is available here: http://www.qsl.net/n9zia/28vdc/MAX471-MAX472.pdf

Have you ever checked the values you get from this sketch with a real Voltmeter and Ammeter?

]]> By: keving https://kevingulling.com/2017/03/arduino-gy-max471-voltage-and-current-testing-module/#comment-13181 Tue, 18 Jul 2017 18:22:26 +0000 https://kevingulling.com/?p=1543#comment-13181 In reply to Thierry.

The sketches here work for me, if you post your sketch you are working on perhaps I can locate the issue. Also at the time I wrote this article, I could not find a datasheet on this module, can you please share the link to the datasheet? Thank you!

]]> By: Thierry https://kevingulling.com/2017/03/arduino-gy-max471-voltage-and-current-testing-module/#comment-13180 Tue, 18 Jul 2017 16:41:12 +0000 https://kevingulling.com/?p=1543#comment-13180 I have read the datasheet of the M471 in full and I just wonder how you could measure anything out of the sign since this is an open collector which triggers when current above ca 4mA is passing in the load. Moreover I still wonder where the calculations come from, it is unlikely anything related in the datasheet, I have tried this sketch with no reliable results at all. Why do you set the variable ‘arduino voltage’? Where does the 1023.0 value comes from? I am going to experiment with the data in the datasheet to make it reliable or at least, working. Cheers.

]]> By: Protte https://kevingulling.com/2017/03/arduino-gy-max471-voltage-and-current-testing-module/#comment-12953 Mon, 03 Jul 2017 17:00:32 +0000 https://kevingulling.com/?p=1543#comment-12953 Hi,
How did you connect is AT/VT (or A0/A5) to the module ?

The pinout on the module seems to be RS+,GND,OUT,SIGN,GND,RS-

Regards
Protte

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