HELLO, PEOPLE. I HAVE A LITTLE PROBLEM, I CAN'T FIND A WAY TO CONNECT THE SDB628 TO THE MCP4132 50K. IT IS A RHEOSTAT...
COULD SOMEONE HELP ME? PLEASE.
I HAVE ALREADY BURNED SEVERAL COMPONENTS AND STILL CAN'T FIND A SOLUTION.
I AM USING SDB628 IN MODULE AND MCP4132 CONNECTED TO ARDUINO (BETTER SAID ATTINY85, BUT IT HAS THE SAME FUNCTION AS WITH ARDUINO).
THE DIFFERENCE IS THAT THE SDB628 USES POTENTIONETER AND DIVIDES THE RESISTOR INTO 2, BUT THE RHEOSTAT IS ONLY LIKE 1 RESISTOR. ANY WAY TO FIT IT?
Are you angry screaming your question (all caps)? Posting links to technical information on the hardware parts helps us help you. Posting a peprosed schematic is always a good starting point. Note the MCP4132 has three resistor outputs same as a potentiometer; CW, CCW, and Wiper depending on which part you pick. You chose rheostat in place of potentiometer. There are also other devices that will give you the same function.
Hi, sorry, I'm from Argentina and I'm using the translator, I had already written it in capital letters...
Here I leave the corresponding links of the data sheets.
I was able to make a connection. put a resistor to negative, then the other 2 legs use those of the rheostat. but I can't get it to vary more than 1 volt.
Unfortunately in Argentina many components are not available, but on top of that I bought 9, and I would like to use them.
Thanks, it is much more friendly now. Looking at your circuit the pot should be the sum of R1 and R2 + offset resistors. You may be out of luck with the pot. You will have to add offset resistors so you do not go over or under the maximum allowed. Your pot would connect to R1 as CCW and R2 as CW or the other way around. These devices have a minimum current in the control leg so you have to be in that range. Sorry I cannot help more.
It makes more sense with R1 fixed and R2 (to ground) with the digital pot.
Then you're sure pot voltages can never get outside the supply boundaries of the digital pot.
You must of course share buck supply ground with Arduino ground.
Leo..
