Ramsey Electronics PG13 Manual de instrucciones descargar pdf (Pagina 11)

RV-1 • 11

[ ] 23. Welcome back! Now we are ready to install R27, a 5.6K resistor

(green-blue-red). Some resistors have a 2% tolerance, so the band

colors are green-blue-red-red, the last band denoting the 2%

tolerance. Be careful as sometimes you may confuse it for another

resistor value by reading the lines backwards.

[ ] 24. Install R26, another 5.6K resistor (green-blue-red).

[ ] 25. Install C8, a 10uF electrolytic capacitor. This capacitor serves the

function of getting rid of some noise on the power source for U2

provided from U3 by "smoothing" out the noise from the operation of

U2, the timer circuit. Pay close attention to the orientation since this is

an electrolytic.

[ ] 26. Install U3, the BBD (marked MN3007). Check all of your solder joints

for bridges and or cold solder joints. This chip is the heart of your kit so

be careful installing it. Make sure that it is oriented according to the

parts layout diagram.

[ ] 27. Install C3, a 10uF electrolytic capacitor, again check orientation. This

capacitor smooths out the noise in the main power supply created by

the running circuits.

[ ] 28. Install R21, a 100K resistor (brown-black-yellow).

[ ] 29. Install R22, another 100K resistor (brown-black-yellow).

[ ] 30. Install C9, a 680pF ceramic capacitor (marked 680 or 681).

[ ] 31. Install R12, a 47K resistor (yellow-violet-orange).

[ ] 32. Install R15, a 2.2K resistor (red-red-red).

[ ] 33. Install U2, the BBD controller chip (marked MN3101). This chip not

only provides the proper duty cycles for clean operation of the BBD,

but also supplies some necessary voltages for the BBD. Make sure all

eight pins are soldered correctly and its orientation is correct.

[ ] 34. Install R28, a 1M resistor (brown-black-green). Caution 1,000,000

ohms!

[ ] 35. Install R31, a 100K resistor (brown-black-yellow).

[ ] 36. Install R29, another 100K resistor (brown-black-yellow). This resistor

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Ramsey Electronics PG13 Manual de instrucciones Pagina 11