Looking for a Digital Potentiometer

Other Hardware General Electronics
1

Hi Guys,

Does anyone know where I can buy a Digital Potentiometer that is in the 1 Ohm range?

Thanks,

Cameron.

2

No such animal I'm afraid, they are all in the kohm range.

What do you want to achieve? Digital pots are not power devices, they are for
analog signal control.

3

Can you even find a non-digital potentiometer in the 1 Ohm range?

Maybe some Nichrome wire and a servo...

4

Could you not utilise a digital rotary encoder on a digital pin?

5

You can put a 1K digital pot in parallel with a resistor in the 1 ohm range.

6

I'm using an IN125 (amplifier) IC, and I need to put a resistor over one of the pins, and it's in the range of ohms. The less resistance the higher the amplification. I think i'm going to buy a 1k digital potentiometer and put a resistor is series (to bring it down into the ohms level) with the output.

What do you guys think?

Cheers,

Cameron.

7

I think a few minutes with a spreadsheet will tell you that it won't work very well

DPot R Combination
1000 .999
500 .998
100 .990
50 .980
10 .909
5 .833
1 .500
.5 .333
.1 .091

8

cameronasmith:
What do you guys think?

I think you need to explain fully what your requirement is - what you are trying to achieve, how the particular IC seems to suit the purpose, and give a schematic of your intended circuit - as well as a link to the datasheet of the proposed IC.

Only then can we suggest suitable ways to achieve not a "Digital Potentiometer that is in the 1 Ohm range", but a way to achieve your objective.