opening
presenting LED cock with DCF77 modification
wall clock components
wall clock module
motor driver IC
clock motor
motor control using pulses
time setting IC
hand sync using a light barrier
minutes mechanism
minutes and hours light barriers
DCF77 IC
bury wall clock and salvage DCF77 module from digital clock
DCF77 signal
clock drift setup
time drift results
firmware usage
final LED clock with DCF77 receiver
closing