Ramsey Electronics ICI1 Assembly And Instruction Manual - page 15
ICI1 Page 15
to use enough solder and heat for a good solder connection, and be extra
careful not to “bridge” any solder connections together. It usually works
best to solder the two “corner” pads first to hold the IC in place, and then
work through the remaining 18 connections. Once the socket is soldered,
insert the microcontroller IC into it. Pay particular attention to the
orientation of this device. Make sure to align the notch or dot associated
with pin one with the notch shown in the parts layout diagram. It may be
helpful to gently “rock” the IC on its side on a hard flat surface before
installing to align the rows of pins so that they slide in easily.
19. Using a scrap component lead, form a jumper wire and install in the
JMP1 holes. Jumpers act like electronic “bridges” that carry power or
signals over active traces on the circuit trace side of the board. Solder
both connections on the bottom side of the circuit board.
20. In the same manner, form and install jumper wire JMP2.
21. Install C3, 0.1uF ceramic capacitor (Marked 104).
22. Install X1, the quartz crystal in the silver can labeled 9.M8304. This
piece of quartz actually vibrates at a specified frequency when a voltage is
applied to it. This sets up a reference clock for the microcontroller so it can
execute the pre-programmed code routine contained within it. Install the
crystal in the X1 position in either direction, making sure to solder both
leads.
23. Install C8, 10 pf ceramic disc capacitor (marked 10).
24. Install R18, 1 Megohm resistor (brown-black-green). Notice that this
component is mounted “standing up” in place. Consult the parts
placement diagram for the correct position.
25. Install C2, a 0.1uF ceramic capacitor (Marked 104).
26. Install C6, another 0.1uF ceramic capacitor (Marked 104).
Notice at this point there is a position for R6; this is not installed and was
meant as a place holder for future use.
27. Install C1, the remaining 10 pF disc (marked 10).
28. Install S2, the PC mount pushbutton switch. We will use this when
programming our completed kit.
Whew! That was some work. But we are almost done! It’s a good time now to
recheck all your work up to this point. Carefully inspect the circuit board for
stray leads or open solder connections, trim and touch up any that need work.
Next we will install the output relays that control the external devices. Notice
how symmetrical the outputs appear; each is exactly the same as the one next
to it. To take advantage of this, we will use common components and place
them in all four output stages at once, this will save a lot of back and forth with