Raspberry Pi用 8チャンネル 18ビット アナログ-デジタル変換器

I looked through this kind of the hat for raspberry pi for measuring the sensor signal. It's cute and easy to handle in programming, too. It's really fitting to my purpose.

I've ordered 6 of these so far, I've tried several due to my own wiring issues but they work great - I use them with piezo sensors to pick up vibrations.

I needed to measure six different vacuum pressures using 26PC SMT Series Pressure Sensors from Honeywell. As the sesnor outputs are low at 50 mV over the full range of 0-1000 hPa pressure (with 5 V power source), I needed a multi-channel high-resolution ADC to get accurate measurement. With a maximum ADC input of about 5 V, a 12 bits ADC would give me a resolution of about 24 hPa, which was not sufficiently precise. I therefore selected the 18 bits ADC that would give me a measurement resolution of 0.02 mV or 0.4 hPa. I received the package and it included the ADC PCB and the 40-pin connector to Raspberry Pi. The connector has to be soldered on the PCB by yourself, which may be difficult if you do not have the right tools and/or experience. I connected the ADC to the Raspberry Pi and downloaded the scripts from the ABElectronics Github repository. I tested both Python and C-scripts and received measurements from the sensors. Scripts are easily adapted to your needs. The ADC met my expectations and I am very satisfied with this product.