We have spent these months to make circuits simpler. Here is the successful result. These changes not only reduce manufacturing price but also increase a robustness to survive chip crisis.
- Removed demodulator ADA2200
- Removed -1V regulator TPS63710
- Changed ADC from ADS1219 to NAU7802 (DIP or SMD)
- Changed LED driver from PCA9955+MCP4551 to TLC5929
We will assemble latest board and pick up best photodiodes. That is everything in our hardware to-do list. Software is also in great progress. 3rd party evaluation will be held with this board over MQTT protocols with AWS IoT.