Time for the transistors now and the 78l05. It have an orientation also, just follow
the shape of the drawing. Transistors are heat sensitive, don't sleep when
soldering. We recommend to mount all the transistors on the PCB and then solder
all the left legs. After that continue with the middle leg following the same order
and finally do the same with the right leg. This way you will let the transistors to
cool down avoiding high temperatures.
Now solder the IC sockets. The mark on one of the sides points to the first and last
pin. This one should face up.
