Analog differential signal sampling front-end made of CH552 and HX712, uploading data through the analog USB serial port
The parameters are just that, ENoB has 18.9 Bits at 40Hz
The cost of the entire board, excluding the sensor, is maybe... five yuan? (
The sensor is not limited to the SOT-23-5 in the schematic diagram and can be modified and replaced by yourself.
See the code on Github: libc0607/ch552-tmr-afe
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