Saturday, May 20, 2023

Darrian Shue

Found the unsoldered board (it was being used by other pay-firm members)
Planning on using the scope to test the oscillator frequency, need to check w/ Ethan

Darrian Shue

only found 4/5 boards → two of them are unsoldered
one is soldered and works (apparently) → Apparently the PCB labelled “2” doesn’t work, the unlabeled PCB does actually work
other one is soldered and doesn't work (apparently)
Cant find the 5th board (which if I recall correctly it is soldered and works (i remember something about it working after Ethan tested it …
- asked pay-firm if there is a missing H7, waiting on response
- its possible that someone took it out to use the H7 and detached the RTC board (but why would they not put the board back to where its supposed to be?)
- or also that someone took it out to work on it and its now somewhere we cant find…
Started working on testing
- focus on testing the resistance / voltage drop b/w two terminals on the transistor switch
- also find out how to test the oscillator clock being 32.768 kHz

Saturday, April 1, 2023

Ethan Jeng & Darrian Shue

Testing 1st WDT breakout pcb, it outputs the time
- Pin connections: VCC (red), GND (black), pin6 SDA (yellow), pin7 SCL (white)
Need to set address 0x1F to value 0xA1 every time you want to write to the chip
2nd breakout PCB doesnt work :/ need to figure out why
Setting AutoCalibration to 00 so more freedom in AutoCalibration period as seen below