0:55 all parts are ready after such a process 0:59 assembling 1:03 the power unit is done 1:06 How easy! 1:10 design the electrical circuit next 1:15 making a print pattern 1:20 a compnay will make a circuit board if you pass them the datta 1:25 solder electrical parts on it and the circuit board is completed 1:30 it' time for functinal testing 1:38 good feeling