Robotic Arm Interface

Parts List:

Printed Circuit Board (PCB)
USB connector
LED (red) (D1)
LED (green) (D2)
(2) 330 ohm resistors (R1 & R3)
330 ohm 1/4 watt resistor (R11) (or 300 ohm)
4.7K ohm 1/4 watt resistor(R2)
0.1 uF Capacitor (C1)
10uF 16v Capacitor (C2)
(2) 22 pF Capacitors (C3 & C4)
0.47 uF Capacitor (C5)
20 Mhz Crystal
18F2455-48 PIC Microcontroller (pre-programmed)
Slide Switch (S1)
Toggle switch (S2)
28 pin socket (U6)
(5) 8 pin sockets (U1-5)
(5) MOSFET 30V 8-PDIP
8 pin Right Angle Female Header
CD-ROM
USB Cable

Determining Resistor Values

Resistor values are read using the color bands on the body of the resistor. The first band is the one nearest the end of the resistor. Start reading from this band. The first band represents the first significant number, the second band, the second significant number and the third band is the multiplier. If the third band is gold or silver this indicates a multiplier value of .1 or .01 respectively.

Color

Black
Brown
Red
Orange
Yellow
Green
Blue
Violet
Grey
White

Value

0
1
2
3
4
5
6
7
8
9

Multiplier

1
10
100
1000
10000
100000
1000000
10000000
100000000
1000000000

Tolerance (%)

Gold 5%
Silver 10%
No Band 20%

Example: A resistor with the color bands of Red, Red, Orange, Silver
1st Number Red = 2
2nd number Red = 2
3rd Number Orange = 3 multiplier (number of zeros) that equals 1000
Silver = 10%

Putting it all together:

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