v.9 PCB is mostly evaluated
minor error in silkscreen on the voltage divider for monitoring battery voltage. The schematic is correct.
drill size of I2C LCD header was too small.
Both items are corrected
I may consider mounting the delay pot headers with right angle connector so I can keep the pot connected while programming the display controller
Software development
Both Arduinos are functioning
Basic PI code is running and evaluation will start on sending meaningful timing parameters to the PI controller
Pressing ‘SELECT’ will display the battery voltage
low battery detection automatically every 30s
TODO: shut down PI timing entirely when battery is low
Battery Type | Low Voltage Warning | Low Voltage Turn Off |
|---|---|---|
LiPo | 9.5V | 9.0V |
Alkaline | 7.5V | 7.0V |
Cyril’s development board has delay offset set to 413 (for recalibration purposes)
Basic TX pulse-width is working
Sample width is working
Audio tone selection is working