Author Topic: inair9b J4 question  (Read 1122 times)

cswiger

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inair9b J4 question
« on: March 11, 2016, 05:40:47 AM »
Hi - have the inair9b working fine, very happy. I had to connect the pin IM11_5v to 3.3v for it to work if I recall correctly.

Is that pin ACTUALLY 5v compatible? There is jumper j4 to connect it to the 3.3v supply, which I am effectively using.
Now I have an option (using a linkit one arduino compabitle board, which is 3.3v digital pins, no level converter needed)
to use 5v - studying the sx1276 datasheet I do *not* see *any* pin is 5v, even to a power amp or anything I can find.

So is it really safe to supply IM11_5v with 5v ??  :|     Asking to be safe than sorry!

cswiger

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Re: inair9b J4 question
« Reply #1 on: March 11, 2016, 11:06:58 AM »
Actually it seems to work at high power with IM11_5v going to ground as well.

modtro2

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Re: inair9b J4 question
« Reply #2 on: March 13, 2016, 04:47:04 PM »
Hello, all inAir boards(inAir4, inAir9 and inAir9B) are maximum 3.6V. Do not connect 5V supply to them. You can also refer to the SX1276 and SX1278 datasheets.

Please refer to the schematic and pinout diagram on product page.