Category: Sensor Hats

3D Sensor Hat – Block Diagram

First attempt on block diagram for the 3D Sensor Hat. The main components are FXOS8700 (Accelerometer and Magnetometer), FXAS21002 (Gyroscope), NEO 6/7/8 (GPS) and BME280 (Temperature, Humidity and Pressure). I am also attempting a TFT connection here, but this is secondary and can be ditched if needed. The rest is classic – Raspberry PI/SPI on…

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Sensor Hat Finished

Final 3D of the Sensor Hat. The most noticeable here is that I start using the 2×5 pin SWD header. The rest is as described before. MCU STM32F405RG 1 x High Speed SPI for backbone Raspberry PI Hat format 1 x CAN for control bus. 8 x 2 x Analogue/Digital IO Signals. 3 x I2C…

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Sensor Hat – Mockup 3

Just added the package for CR1220. The actual package look at bit different, but this has the correct footprint and size. This looks like a large component, but it is not – it is more an indication of how small and dense these Hat’s are. I will attempt to update the next revision of XPortHub…

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Sensor Hat – Mockup 2

I have still not routed this, but schematics and component location is getting in place. I have to make a package for CR1220 battery holder for RTC + I would like to make the proper packages for the connectors as well. I dropped the extra CAN and RS485 due to lack of space + I…

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Sensor Hat Mock-Up

An early mockup indicate I can manage 15 connector on a Hat with USB, but I will have to remove the external power connector and one of the connectors are CAN1, meaning the actual number of sensors are 14 connectors. If I dropped I2C and SPI I could just about manage 16 Analogue/Digital sensors, but…

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Generic Sensor Hat

Some sensors like 3D sensors are suited to be mounted directly on a Hat, but a majority of sensors actually need to be mounted remotely to provide proper input. To interface to these I need an adapter card with connectors as illustrated above. STM32F405 have 16 ADC inputs that also can be used as GPIO…

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3D Motion Sensor Hat

  To create a drone you need 3D motion sensors with some accuracy and the block diagram above illustrate a Hat with Gyroscope, Accelerometer and Magnetometer + some other sensors. Using a STM32F405 for this purpose is a bit overkill, but I also added RTC and SPI Flash to give the module some motion math…

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