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Topic: Wiring the digital potentiometer AD5280 (Read 55 times) previous topic - next topic

c0rsa1r

Hi all, I'm about to replace a 50k (12v) analog potentiometer with this high voltage digipot.

Honestly, that's not the first time I try to use a digital potentiometer but I'm not very sure of the wirings (because of two different voltages, 5 and 12v).
So, before turning the whole thing on here's the wiring I supposed to be correct.

Using Arduino UNO r3, 50k digipot AD528 datasheet

pin1 = A = 12v
pin2 = W = WIPER
pin3 = B = GND
pin4 = Vdd = 12v
pin5 = SHDN = 5v
pin6 = SCL
pin7 = SDA
pin8 = GND
pin9 = GND
pin10 = GND
pin11 = GND
pin12 = not connected
pin13 = 5v
pin14 = not connected

(4.7k pull-up resistor on both i2c pins, pin 8-9 are tied to GND for the i2c addres)

Are those wirings correct? Any help would be really appreciated!

Thank you!
"The S2000 is nothing so much as a legend in its own time. If you don't like it, you probably haven't driven it hard enough." - Car culture

pylon

If the output of your digital potentiometer is simply an analog value between 0 and 12V this seems to be OK. A and B can be any connection and doesn't have to be GND and 12V.

c0rsa1r

If the output of your digital potentiometer is simply an analog value between 0 and 12V this seems to be OK. A and B can be any connection and doesn't have to be GND and 12V.
Yes, I simply need to replace a 50k normal potentiometer with this one. I measured the voltage across A and B on the analog pot and it's 12v (that's why I wrote 12v in the first post).

Thank you! I'll try right now to power it up!
"The S2000 is nothing so much as a legend in its own time. If you don't like it, you probably haven't driven it hard enough." - Car culture

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