Ramsey Electronics manual RR1 REMOTE REPEATER KIT ASSEMBLY

RR1 REMOTE REPEATER KIT ASSEMBLY

Assembly of the RR1 is straight forward but it does require some time and patience. To get our bearings, we will start with mounting the power jack and move on from there. It serves as a good reference point for the other parts.

‰1. Install J3, the 2.1 mm power jack. Be sure to get a good, solid connection to all three pads as this will have to take some mechanical strain during normal use. Use ample solder without going overboard.

‰2. Install J1, the 2-screw terminal connector. Make sure and mount it so the holes are facing the outside edge of the board. This is where you will be mounting the IR LED wires when you are finished with the rest of the assembly. The screw terminal makes it easy to work with later so you can change the IR LED feed wires without using a soldering iron.

‰3. Install R1, a 100 ohm resistor (brown-black-brown).

‰4. Install Q1, the 2N3904 transistor. Do NOT mix this up with the 78L05! Even though these are in the same package style, the inside circuitry is quite a bit different. Mount this part so the flat side is in the same orientation as shown on the silk screen.

‰5. Install C1, a 10 uF electrolytic capacitor. Why do we mention the capacitor type? It’s because electrolytic capacitors are polarity sensitive; they only like to be installed in a single orientation. We indicate the positive side on the PC board with a + sign. The capacitor however is usually marked on the negative side with a - sign. Make sure and align them so the negative side is opposite of the positive side we indicate!

‰6. Install C2, a 0.1 uF ceramic capacitor (marked .1 or 104 or 100 nF). Ceramic capacitors are not polarity sensitive so whatever direction you feel like putting it in is fine as long as you use the correct two holes.

‰7. Install R2, a 1K ohm resistor (brown-black-red).

‰8. Install the 8-pin DIP Socket used to mount U1 (the PIC micro-controller IC). It doesn’t matter which way the socket is oriented, as long as the IC chip is inserted correctly in relation to the silk screen on the circuit board. You can bend two of the corner leads out slightly to hold the socket in place when you flip the board over to solder it in. Be sure to solder all eight pins!

‰9. Insert U1 (the 8-pin micro-controller) into the socket. Make sure the notch or dimple which indicates pin 1 on the IC is oriented in the same direction as the notch indication shown on the silk screen. Before you push it down into the socket, check to be sure that none of the pins are bent under or outside of the socket. When you are sure the pins are where they belong, press it down so that it is seated flat within the socket.

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