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2. Resistors: The values of resistors are given by a series of colored stripes. There are several
tutorials online describing how to decode these stripes, but we will identify each resistor for
you by simply naming the stripe colors, and giving you the value and the part number. "Figure
3: Component Values And Locations" is a good reference. If you are color blind or can't see
the stripes clearly, then you must use your digital multimeter to measure the resistance of each
resistor.
The white graphics on the component side of the board give reference to the part number and
value. A few revisions were made to the circuit after we had the circuit boards made, so some of
the component values printed on the circuit board have changed. Figure 3 does show the correct
component values, so please use it to cross check your work.
Resistors are not polarized, meaning they can be installed into their holes in either direction. It
doesn't matter which lead goes into which hole.
The hole spacing of the resistors on the circuit board allows the leads to be (gently) bent 90
degrees at the body of the resistor (3). This allows the resistors to slip into their holes very easily.
a. Start with the 1M resistors (R15, R16), labeled BROWN, BLACK, BLACK, YELLOW,
BROWN. Compare to its picture in the BOM. Find their locations on the circuit board;
install and bend the leads as described above (4,5,6). Don't solder any of them until all 22
resistors are installed; just bend the leads to keep them in place.
3
5
4
6
11
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