opening
introducing the digital clapperboard
presenting the core board
using a DS1307 RTC
I2C physical layer
I2C setup
I2C data capture
introducing 7-segment displays
segments are just LEDs
using 1 pin/segment
multiplexing segments
introducing TM1637 7-segment display driver
TM1637 protocol
I2C open-collector incompatibility
TM1637 demo
presenting analog multiplexer
multiplexing 7 TM1637
presenting MAX7219 display driver
MAX7219 datasheet
explaining SPI
MAX7219 protocol
using MAX7219 displays
multiplexing buttons to change numbers
power consumption
board to control power
power control circuit
clapperboar assembly
final clapperboard prototype
closing