A calculator for decoding colour code bands
on electronic resistors.

Best viewed in landscape.
Resistance Calculator from The JavaScript Source
___
reset

These lumbering giant components use colour bands or rings to indicate their value. The four bands can represent a wide range of values, from left to right, band 1 and 2 can colour code 100 different values, while band 3 colour codes the divider/multiplier in base10 (0.01, 0.1, 0, 10, 100, 1000...) and band 4 colour codes the resistor tolerance percentage +/- range.

Band 1 represents the most significant number (MSN) and band 2 least significant (LSN). In encoding small values under 10 ohms, it is possible to represent the same value in two ways. e.g. Black Red Black = 2 ohms and Red Black Gold also represents 2 ohms with the later representation the more common.

This interactive JavaScript graphical calculator / interpreter can check your component or memory for resistor colour codes. If the resistor is small, on a blue or green base it may be hard to identify the correct colour rings, so you'll need to use a multimeter in ohms (the horse-shoe shape symbol) and measure directly. Best done when the resistor is out of the circuit!


73's for now.
Gary, VK3KHB


Processed in 0.2513 seconds to
> ec2-18-232-186-117.compute-1.amazonaws.com <
> @ Ashburn, United States <

Site request:# 825498 since 2008.07.01...
File request:# 1777 since 2008.07.01...

File name: res_ccode.html - Size:15487 bytes
Updated on: @ 2020.02.28 14:29:04 UTC FST
Last viewed @ 2020.07.01 04:08:27 UTC FST
Viewed Now: @ 2020.07.08 05:47:27 UTC SPT

Last visitor to site._bot_.
> 34.229.182.253 <
Ashburn, United States

Last File Viewed:
> /atv/chnlchrt.html <
~ 0d 00:01:25 ago
On 2020.07.08 Wednesday
@ 05:46:02 UTC FST


Current Visitor Browser Info:
Viewport [...] x [...]
_Window_ [...] x [...]
Resolution [...] x [...]
Colour Depth [...] bits
Pixel Depth [...] bits

Mouse X (...) Y (...)
Local IP ::::::
Browser: _ _ _ _
Other? ...
V.7.0.32

' vk3khb.gak.net.au '
Average Processes in Run Que @
System Load[2][15min](1)# 2.18 Normal 1-3
System Load[1][5 min](1)# 2.19 Normal 1-3
System Load[0][1 min](0)# 2.04 Normal 1-3
System Load Overall:(2.14) > Normal 1-3 <

Pro.time = 0.2513Secs. by REQUEST_TIME
Alt.time = 0.2226Secs. by PreLog_Time.
Local Server time:
2020.07.08 Wednesday @
07:47:27 Europe/Stockholm

Web services
since Jan.1997 (23 years)