Electronics > Projects, Designs, and Technical Stuff

Yet another resistance decade box

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iromero:
This is a great cheap project, i just ordered some boards and switches. I wonder what the tempco of the resistors in the kit is.

Fortran:
It's ±100ppm/°C

CRCW1206
http://www.vishay.com/docs/20035/dcrcwe3.pdf

The 0.1% was much better.
Also much more expensive for some reason :)

TheAmmoniacal:

--- Quote from: Fortran on July 13, 2016, 01:11:26 pm ---It's ±100ppm/°C

CRCW1206
http://www.vishay.com/docs/20035/dcrcwe3.pdf

The 0.1% was much better.
Also much more expensive for some reason :)

--- End quote ---

Which 0.1% resistors did you use?

Fortran:
A few different actually. The ones I linked in the beginning of the thread was out of stock. All have the same specs though.

±25ppm/°C
http://www.yageo.com/documents/recent/PYu-RT_1-to-0.05_RoHS_L_6.pdf

Iwanushka:

--- Quote from: Fortran on July 13, 2016, 02:29:04 pm ---A few different actually. The ones I linked in the beginning of the thread was out of stock. All have the same specs though.

±25ppm/°C
http://www.yageo.com/documents/recent/PYu-RT_1-to-0.05_RoHS_L_6.pdf

--- End quote ---

25ppm is quite good for this project, and switch resistance does not matter we can always use der ee 500 to check actual value,

I hope you will make new order soon :)

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