General > General Technical Chat
What happend to 320K resistors ?
Jan Audio:
I dont know.
Why 100 ?, i buy per 100 or 1000.
TimFox:
--- Quote from: JohnnyMalaria on February 22, 2021, 02:50:31 pm ---
--- Quote from: Jan Audio on February 22, 2021, 02:29:45 pm ---For SMD people its easy to advice something like that.
--- End quote ---
Seriously, how hard is this?
(Attachment Link)
--- End quote ---
Similarly, decades ago when I started using SMD parts (beginning with 1206), we found it easy to put two components in parallel by soldering one above the other, when circumstances required (probably no longer allowed, especially with smaller parts).
Zero999:
320k being a E192 preferred number, will be more expensive because fewer will be made and it will be a precision part, with a tolerance of 0.5%, or better.
I still don't see the reason for the values listed? Obviously they're powers of two, but I would go for 7k5, 15k, 30k, 60k (two: 30k in series, or 120k in parallel), 120k and 240k. It would be much easier to use an R-2R ladder instead.
https://en.wikipedia.org/wiki/Resistor_ladder
David Hess:
--- Quote from: Jan Audio on February 19, 2021, 03:50:18 pm ---The thing is i like to make a 6-bit DAC :
5K
10K
20K
40K
80k
160k
320k
--- End quote ---
I usually end up using some values in series and parallel to reduce the number of separate value needed. Or use a R-R2 DAC configuration instead which only requires two values:
https://en.wikipedia.org/wiki/Resistor_ladder#R%E2%80%932R_resistor_ladder_network_(digital_to_analog_conversion)
Bassman59:
--- Quote from: bdunham7 on February 22, 2021, 03:06:07 pm ---
--- Quote from: JohnnyMalaria on February 22, 2021, 02:50:31 pm ---Seriously, how hard is this?
(Attachment Link)
--- End quote ---
I don't know about the OP, but for the typical OCD-addled audiophile type that would trigger a meltdown that would require months of therapy.
--- End quote ---
You say that like it's a bad thing!
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