108 Relays -- Writing your own software

Identifying Resistor and Capacitor Values

Most people learn the resistor color code without too much difficulty. But the capacitor numbering system can be really confusing. This can be a pain for kit builders: if you have a parts list that specifies some capacitor values as being 100nF, and kit parts are marked "101" and "104", which one (if any) is 100nF?

There are a number of good references for resistors and capacitors on the 'net (see below), so I'm not going to reinvent the wheel. I will just present the basic resistor color code as a refresher, and an example capacitor table to help translate the id numbers on small capacitors into their real capacitance values.

Resistor Color Code

	Bands
Color	Sig. Digits (1 & 2)	Multiplier (3)	Tolerance (4)
Black	0	1
Brown	1	10
Red	2	100
Orange	3	1000
Yellow	4	10,000
Green	5	100,000
Blue	6	1,000,000
Violet	7
Gray	8
White	9
Gold			5%
Silver			10%
None			20%