The data sheet for the TMP117 says it can support 5V as well as 3V. I can’t see an issue with using this board at 5V except for the Power LED being run over spec and that can be solved by cutting the trace to disable it. Can you confirm that I can run this at 5V? (I’m not interested in using the Qwiic connectors)
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Hi Doug,
Welcome to the forum 
While we can only guarantee the circuit will work at 3.3V with our provided libraries you may still be able to find some success if you do want to write your own drivers or run the module at a higher voltage.
What were you trying to do that required you to power it with 5V instead of 3.3V? Using the board with something like an Arduino will require some custom driver code on your part.
Looking at the datasheet the TMP117 is fine from 1.7 to 5.5V and the logic levels will scale with the supply voltage.
The only unknown is if the supporting discrete components like the LED and the pulldown resistors would be impacted by the voltage change. @Michael may be able to provide more insight there.
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Thanks Trent. I am using an Arduino, not a Pi or other 3.3V controller. The reason I asked, as I mentioned, is that the datasheet says it will go to 5V. I am happy to use other libraries. And I understand that the LED is being overdriven at 5V, that’s why I would cut the jumper to disable it as I mentioned in the original post. If it can be used at 5V (without using the Qwiic connector), maybe this should be added to the documentation and change the silk screen to read VCC, not 3.3V.
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Hi Doug,
With your own custom coding and minor hardware mods you could probably get that PiicoDev module working with the Arduino but that’s not what we designed the PiicoDev ecosystem around.
We’ve tried to make PiicoDev a seamless experience for beginners so they can use the same libraries, on multiple devices, with the same cables that can’t be plugged in wrong by accident. So terms like VCC add a level of complexity and abstraction that serves as a barrier to new users.
The design is open source so power users can still track down the datasheet and specs of the embedded sensors and we provide the schematic diagram so you can look ‘under the hood’ if you need to.
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No probs. Thanks Trent.
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While the PiicoDev ecosystem is rated for 3.3V, there are devices within that will operate at 5V with no problem. The TMP117 is one such device - you should see no problem operating at 5V. I doubt you’ll need to cut the LED jumper - the LED current is less than 1mA at 3.3V. It will just be quite bright at 5V 
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Thanks Michael for your reply. Much appreciated…
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