Transient Modules u3A Build Manual page 3

Transient Modules
8. Solder the 2x 10uF electrolytic
capacitors.
NOTE! Orientation is vital. The long leg should
be positioned in the pad marked with the +
symbol.
9. Solder the power header.
NOTE! This part is placed at the top of the PCB
and soldered from the bottom, as shown on the
image.
10. Solder the 2x 8 pin female header.
NOTE! This part is placed at the top of the PCB
and soldered from the bottom, as shown on the
image.
!! Bottom PCB is now fnished !!
11. Now the top PCB! Start with the SMD
parts again. Solder the 1x TL074.
Position it with the line on the top face
the TL074 at the same end as
(pin1) in the silkscreen,
image.
12. Solder the 3x 1K resistors.
Colour code: brown, black, black, brown, brown.
13. Solder the 3x 2K7 resistors.
Colour code: red, purple, black, brown, brown.
14. Solder the 2x 100nF capacitors,
labelled 104.
The footprint on the PCB for these
NOTE!
capacitors is smaller than the space between
their legs. Use pliers to straighten the bent legs
on the capacitors so they ft in the holes.
of
the circle
as shown in the
u3A DIY build manual - Version 1.1