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Author Topic: Level-Shifter use?  (Read 12372 times)

digistump

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Re: Level-Shifter use?
« Reply #15 on: February 05, 2014, 05:35:13 pm »
Have you tried connecting the DHT22 to the DigiX directly and the VCC for it to 3.3v instead of 5v - it looks like it can run at 3.3v as well and not need the shifter - that could answer if it is a timing, code, etc issue
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Techno

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Re: Level-Shifter use?
« Reply #16 on: February 05, 2014, 06:05:06 pm »
Think I have tried 3,3 Volt with the DHT22 and no Level-Shifting Shield.  Will try it again tomorrow.

I have been in contact with Rob Tillaart over at forum.arduino.cc.  He has had me try a couple of things.  Still not yet working.
Will continue trying suggestions.

I ordered a new DHT22 sensor for testing purpose.

William

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Techno

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Re: Level-Shifter use?
« Reply #17 on: February 06, 2014, 03:24:12 pm »
@digistump

You were right.  DHT22 works @ 3.3 Volts without level-Shifter Shield on A3!  Sketch I uploaded; changed DHT22 pin to pin A11, DHT22 powered by 3.3 Volts.  Using Level-Shifter Shield for I2C bus @ 5 Volts for DS1307 and BMP085 (Model BY-065 -- 5 Volt regulator on breakout board.)  --Both are I2C devices.   :)

William
« Last Edit: February 06, 2014, 03:30:54 pm by Techno »
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