Help with resistors

[PokeMon]

Colors may even change if the resistor is burned or heatup too much.

[1024MAK]

Colors may even change if the resistor is burned or heatup too much.

You need a good white light, some artificial lights may mislead you as to the colour of some of the bands...

Here is two photos of the cardboard calculator produced by Maplin Electonics many years ago (some time in the 1990's):-

image.jpeg

Front

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image.jpeg

Back

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Mark

[gozzo]

...which is totally wrong according to what they have sold from the mid 90s till now...

[makeit2day]

Here is a quick chart that may help:

ResistorColours.gif (22.51 KiB) Viewed 3907 times

[1024MAK]

...which is totally wrong according to what they have sold from the mid 90s till now...

Well, they probably changed supplier, but never updated their catalogue. When they sent out/sold their cardboard calculator, they were selling the type with the same colour code. Later they introduced a 250mW type which had a normal colour code. I bought some of these.

Now get my most of my electronic components from other suppliers.

My point was, there are various different colour coding systems in use. So keep your mind sharp and your eyes open

Mark

[Moggy]

Nice chart thanks for that.

[mrtinb]

I have some components I have difficulty identifying.

The components' texts are:

Code: Select all

+ ,1 35
4P7
4.00

UnknownComponents.jpg (63.45 KiB) Viewed 3789 times

[PokeMon]

From left to right (as best as an be seen on picture):

0.1uF/35V tantalum capacitor (take attention on polarity, + indicating positive leg)
4.7pF ceramic capacitor
4.00 MHz resonator

[sirmorris]

Two caps and a ceramic resonator.
L to R, a capacitor. Possibly tantalum. Polarised, cathode marked with a +. Middle is a cute little 4.7 picofarad cap. Unpolarised. The rightmost is a 4 MHz resonator. Centre is ground, outer pins connect to crystal/resonator inputs on a controller or input to clock generator. They are simple devices, not regarded as accurate. Cheap and cheerful wouldn't be a dishonourable description of them. Used in a zeddy so there you go

[sirmorris]

Ha, beaten by Karl - that'll teach me for typing too many words