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IB-1 • 7
CONSTRUCTION OF THE IB1 INTERFACE BOARD KIT
❒ 1. Install J2 and J3, the RCA style audio and video jacks, on the PC board.
These require some heat for the solder to flow so take your time.
❒ 2. Install J1, the power jack.
❒ 3. Install MK1, the microphone. If you are looking at the bottom of the
microphone the two pins should be on the top and side by side. The pin on
the left is positive and goes to the inside of the board.The pin on the right is
negative and goes to the outside of the board.
❒ 4. Install C1, C2, C3, C5, and C6; they are all 10 uF electrolytic capacitors.
Electrolytic capacitors are polarized with a (+) and a (-) lead and must be
installed in the correct orientation. Ordinarily only the negative side is
marked on the capacitor body with a dark band and a (-) sign clearly
shown. The PC board will usually show the (+) hole location. Use care to
ensure proper polarity, these components can burn out if installed
incorrectly.
❒ 5. Install R1 and R4, 1K ohm resistors (brown-black-red).
❒ 6. Install R2, R3, and R7, 10K ohm resistors (brown-black-orange). By
installing C3, R4, and R7 you have built an AC noise filter as well as a DC
power supply to the microphone.
❒ 7. Check the paperwork that came with your camera. If you have a 12 volt
camera, install the 12 volt regulator in the U1 position. If your camera runs
on 9 volts, install the 8 volt regulator. When looking at the flat side the
input pin is on the left, ground is the center pin, and the output is the right
pin. The flat side or the back of the regulator faces the outside of the board.
❒ 8. Install D1, the diode marked 1N4002. Follow the parts layout diagram
when installing it; the end with the white line on it is the negative end. If you
installed the 8 volt regulator in step 7, install D2, marked 1N4002. If you
installed the 12 volt regulator, install a small jumper wire in the D2 position.
The voltage regulator along with D1, D2, R1, C1, and C2 supply 9 or 12
volts to the camera.
❒ 9. Install Q1 and Q2, 2N3904 NPN transistors. When installing Q1 and Q2
observe the correct placement of the flat side. Press the transistor snugly
into the board so that only a minimum of wire is exposed above the board.
❒ 10. Install C4, .1 uF capacitor (marked .1 or 104).
❒ 11. Install R8 and R9, they are 470 ohm resistors (yellow-violet-brown).
❒ 12. Install R5 and R6, they are 22 K ohm resistor (red-red-orange). These
resistors along with R2, R3, R8, R9, C6, Q1, and Q2 are the audio
amplifier, the heart of the audio section.