Welcome to CuVoodoo,
the sorcery of copper.
generally done = often used method
the number used in the file name increments each time you start a recording
turn the board over
I²C stands for Inter-Integrated Circuit
to communicate with
driving in a push-pull fashion
or the clock
somehow the audio recorder puts a higher pitch at the beginning. this will fade with time.
repetitive = periodic
the address of the slave it wants to communicate with
at the end of this operation (the communication has not ended)
driving low = pulling low
we are repeating the start condition
the slave
plus it is on only half of the time
2 lines
also known as colon
TM1637
audio recording starts with a high pitch again
lower brightness
the first being transmitted
again this high pitch issue
later I²C releases (for Ultra-Fast mode) uses push-pull logic instead of pull-up resistors
2 kΩ is usual for the normal mode
3 signals to select the output
MISO
you can find the information in the datasheet
low
wants
ID = slave address
these are maximum clock frequencies
I²C version 2 and later added faster modes, but they are not commonly used
pre-defined maximum clock rate
we should see the display is not working
8 or 16 bits SPI frames/packets
pulse LOAD high for MAX7219, pull CS low for MAX7221
I²C EEPROM
I²C bus
reading at boot, writing upon change
and accordingly which video track it corresponds to
actually a vibration sensor
vibration sensor
on and off
the green is still weak
because the battery is thinner
let me know if you would be interested in getting a professional version