Circuit Electronics » metal film http://www.circuitelectronics.info Electronic Circuit Design, Repair, Software, Components & Theory Wed, 28 Jul 2010 01:38:06 +0000 http://wordpress.org/?v=2.9.2 en hourly 1 the closest standard resistor values? http://www.circuitelectronics.info/electronic-circuit-designs/the-closest-standard-resistor-values/ http://www.circuitelectronics.info/electronic-circuit-designs/the-closest-standard-resistor-values/#comments Sat, 20 Jun 2009 11:19:41 +0000 admin http://www.circuitelectronics.info/electronic-circuit-designs/the-closest-standard-resistor-values/ i'm solving electronic homework ,and i got the values R1=66.67
R2=12.4k
(and Rs=10 ,RL=1k are given),there is part in the question which want me to chose the closet values for the resistor before i design the circuit in pspice program.
can u tell me how i can chose from the given appendix below

Preferred resistance values (approximately 10% increase)

I1.01.52.23.34.76.8
II1.11.62.43.65.17.5
III1.21.82.73.95.68.2
IV1.32.03.04.36.29.1

I to IV for (+-)5% tolerance resistors
I and III for (+-)10% tolerance resistors
I for (+-)20% tolerance resistors

Values multiplied by 1, 10, 100, 1k, 10k, 100k, 1M, 10M
Multiplier 10 to 100k can cover all the preferred values
E.g. 11, 110, 1.1k, 11k, 110k

Resistor types: Carbon film, metal film, wirewound
i think this will be clear

I(1.0)(1.5)(2.2)(3.3)(4.7)6.8)
II(1.1)(1.6)(2.4)(3.6)(5.1)(7.5)
III(1.2)(1.8)(2.7(3.9)(5.6)(8.2)
IV(1.3)(2.0)(3.0)(4.3)(6.2)(9.1)

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