Transient Modules
u3A DIY build manual - Version 1.1
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
of
the TL074 at the same end as
the circle
(pin1) in the silkscreen,
as shown in the
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.
NOTE!
The footprint on the PCB for these
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.