Transient Modules
u3A DIY build manual - Version 1.1
1. Empty the bag into a bowl or
container. This makes it much easier to
pick the parts as you need them and
you’re a lot less likely to lose anything.
2. Let's start with the SMD parts! Solder
the 2x
TL074
ICs. Position them 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.
TIP for SMD soldering:
3. Solder the 17x
10K
resistors.
Colour code: brown, black, black, red, brown.
4. Solder the 2x
1N4007
diodes.
NOTE!
Orientation is
vital.
The gray
line
on the diode (cathode) must match the
silkscreen, as shown in the picture.
5. Solder the 2x
ferrite beads
.
6. Solder the
7805
regulator. Labelled
7805.
7. Solder the 7x
100nF
capacitors,
labelled 104.
There are 2 capacitors that have a more narrow
space between legs than the others. Those are
for the top board!