2.2 Load parts on each board. I do them in this order:
1. 100k reset capacitor
- 2. 470 LED current limiting capacitor
+ 2. 470 LED current limiting resistor
3. Power switch
4. CPU
5. CPU bypass cap
5.1 Flow a small amount of solder onto the center conductor pad so
that it is raised high enough to hit the battery terminal.
- 5.2 Take the metal battery holder cage, align to the circuit board and
+ 5.2 Clean the resulting pad with isopropyl alcohol
+
+ 5.3 Take the metal battery holder cage, align to the circuit board and
clamp the ATtiny85 end in a vise whose jaws are horizontal. This
end has enough board surface on the parts side to allow clamping,
especially if you align the bypass cap inside a gap in the vise
jaws.
- 5.3 Press down on the battery holder so that the exposed terminal
+ 5.4 Press down on the battery holder so that the exposed terminal
makes firm contact with the PCB pad. Solder in place.
- 5.4 Remove from vise.
+ 5.5 Remove from vise.
- 5.5 With the vise jaws vertical again, place the board in the end of
+ 5.6 With the vise jaws vertical again, place the board in the end of
the vise with the remaining battery holder terminal exposed.
- 5.6 Solder in place.
+ 5.7 Solder in place.
- 5.7 Load battery into plastic tray, install in battery holder
+ 5.8 Load battery into plastic tray, install in battery holder
6. System test