I have made my own heated jacket and the power control is done by PWM switch installed into my motorcycle. It has by default an analog potentiometer with switch but I would prefer to have a digital potentiometer that I could control through simple rocker switch as I have for my heated grips.
Goal would be to have only 4 to 5 steps.
I am not familiar with the science behind this particular PWM controller that seems to be much more complicated than basic 555 chip operated versions. This brings me to the problem that I have.
The analog potertiometer receives ~5V current from the circuit side and its resistance varies between 4 ohm and 12,5k ohm. I havent been able to find a digipot with that low internal resistance nor with 12,5k ohm upper limit. They "all" seem to stop at 10k ohm and start from +40ohm. I dont know if this is a problem in anyway due to the lack of understanding. One last thing is that most of the digital ones seem to have a high number of steps (31-1000) and in my use case its not desirable.
How would you recommed me to solve this issue? Just throw a 10kohm digipot or should it match the original?
I have been playing around with the idea of buying just the chip and solder it myself and sinking into an epoxy for protection or buying and ready board..
PWM contoller that i have is this one:
https://www.amazon.de/Controller-Ov...pd_rd_i=B075FTQ334&psc=1&ref_=pd_bap_d_rp_1_t
Goal would be to have only 4 to 5 steps.
I am not familiar with the science behind this particular PWM controller that seems to be much more complicated than basic 555 chip operated versions. This brings me to the problem that I have.
The analog potertiometer receives ~5V current from the circuit side and its resistance varies between 4 ohm and 12,5k ohm. I havent been able to find a digipot with that low internal resistance nor with 12,5k ohm upper limit. They "all" seem to stop at 10k ohm and start from +40ohm. I dont know if this is a problem in anyway due to the lack of understanding. One last thing is that most of the digital ones seem to have a high number of steps (31-1000) and in my use case its not desirable.
How would you recommed me to solve this issue? Just throw a 10kohm digipot or should it match the original?
I have been playing around with the idea of buying just the chip and solder it myself and sinking into an epoxy for protection or buying and ready board..
PWM contoller that i have is this one:
https://www.amazon.de/Controller-Ov...pd_rd_i=B075FTQ334&psc=1&ref_=pd_bap_d_rp_1_t