Ramsey Electronics ICI1 Assembly And Instruction Manual - page 12
ICI1 Page 12
ICI1 REMOTE CONTROLLER INTERFACE ASSEMBLY
Assembly of the ICI1 is fairly easy, as we use all through hole components,
but it requires some time and some patience. We will start with the side that
has the power jack, and we will move from there using the power jack as a
reference.
1. Identify and install power connector J7 toward the rear of the printed
circuit board. Gently slide the leads through the circuit board until the
connector is flush to the board with the connection hole facing towards the
outside of the kit and solder all three connections. Use enough heat to
flow the ground connection completely; this may take a little while
depending on the wattage of your soldering pencil. Use caution when
soldering the other two leads so that too much time or heat is not applied;
it may cause the printed circuit trace to lift away from the circuit board
2. Install J4, the 2-screw terminal connector. Make sure and mount it so
that the receiving holes are facing the outside edge of the board. This is
where you will be mounting the interface wires when you are finished, so
make sure that the openings face outward. The screw terminal makes it
easy to work with, and you can change the wires without a soldering iron.
Again, these jacks will deal with the strain of interconnection to “the
outside world”, so use enough solder for a robust solder joint.
3. In the same manner, install J1, J2 and J3, also two screw terminal
connectors.
4. Moving to the other end of the circuit board, install pushbutton switch
S1 by inserting all six leads through the circuit board. The switch should fit
flat to the circuit board before soldering.
Great job up until now! Take a moment to check your previous solder joints for
“opens” where the solder did not completely flow around the connection or
solder bridges between closely spaced pads. It seems the best time to identify
these types of problems is now when you’re focused on this section of the
board, saving you time trying to retrace your steps later.
Now we will build the power supply portion of the circuit. We use a 78L05
voltage regulation circuit to provide for a clean trouble free voltage source for
the infrared interface. It is critical that the power source be free of noise and
any hum for proper operation of the kit. The 78xx series of voltage regulators
is extensively used in many of today's modern electronic appliances to
perform this task.
5. Identify D6, the 1N4002 diode (black epoxy case with a polarity “band”
denoting the cathode (negative) side of the diode). Install as shown in the
parts placement diagram, noting the proper orientation of the polarity
band. Since a diode only will conduct when it is forward biased, this diode
acts as a “reverse voltage” protection circuit. Diodes are often used as