# Qwiicboost module

**URL:** <https://forum.core-electronics.com.au/t/qwiicboost-module/17813>\
**Category:** Uncategorized\
**Created:** [17 August 2023 00:38 UTC](https://forum.core-electronics.com.au/t/qwiicboost-module/17813 "2023-08-17T00:38:34Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Gerard163258](https://avatars.discourse-cdn.com/v4/letter/g/a5b964/32.png) [@Gerard163258](https://forum.core-electronics.com.au/u/Gerard163258)\
**Post date:** [17 August 2023 00:38 UTC](https://forum.core-electronics.com.au/t/qwiicboost-module/17813/1 "2023-08-17T00:38:34Z")

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Hello all,

I picked up a qwiic boost from Core a few days ago. I want to interface a solderparty keyboard to my Arduino project so I need to level convert the Arduino I2C (+5v) to 3v3 which is the task of the qwiic boost and I think it should be OK since the keyboard is output only.

Question: The qwiic boost looks like a simplex operation and outputs +5 signalling to 3v3 signalling?

Thanks

Gerard

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**Author:** ![Michael](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/michael/32/3545_2.png) [@Michael](https://forum.core-electronics.com.au/u/Michael)\
**Post date:** [17 August 2023 01:11 UTC](https://forum.core-electronics.com.au/t/qwiicboost-module/17813/2 "2023-08-17T01:11:16Z")

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Hi @Gerard163258  
Looking at the [schematic](https://core-electronics.com.au/attachments/localcontent/Qwiic_Boost_Schematic_641648c751f.pdf), the Qwiic boost appears to use a very common bi-directional logic-level translator circuit.

Since we’re talking about I2C, all logic level conversions need to be bi-directional because the bus can be driven by the Controller (arduino) or the device (keyboard)

in short, it will work for connecting 3v3 logic devices to a 5V arduino

best of luck with your project 😃

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**Author:** ![Gerard163258](https://avatars.discourse-cdn.com/v4/letter/g/a5b964/32.png) [@Gerard163258](https://forum.core-electronics.com.au/u/Gerard163258)\
**Post date:** [17 August 2023 02:14 UTC](https://forum.core-electronics.com.au/t/qwiicboost-module/17813/3 "2023-08-17T02:14:45Z")

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Oh yeah. I looked at the schematic again and you are right.

The project is nearing the stage where we need some test sites to get some real user data and feedback.

I didn’t realise this but the biggest challenge by far is not technical but getting investors to put up some funds. I knew it would be a challenge but I didn’t think that it would be quite that hard. 😃