Hello,
I have a NordicTrack T6.5 that was hit by the firmware update bug that bricked the console. I refuse to pay 500 dollars for parts for something they broke so here we are. I would like to convert the console into a simple up/down rocker for incline and a pwm dc motor controller for the belt. I have been going off the MC2100 diagrams found on this all about circuits forum. It had me questioning my design and wonder if I need to step down the voltage from 12V to 5V. Does anybody have any tips or schematics for the MC1658DLS? My idea was to do something similar to below using the 8 pin connectors from the HD6 on the 1648 board. Also, can the violet incline sensor wire be ignored or does the board require it?

Rocker Switch for incline
DC Motor

 

At this point I think I have found most of what I need besides the frequency if any I should be using on the analog out to the controller board for the motor. I am thinking of using an arduino boards PWM pins to send the voltage back to the board. I am stuck trying to figure out if a should be using a special fequency to calculate the duty cycle.

 

At this point I think I have found most of what I need besides the frequency if any I should be using on the analog out to the controller board for the motor. I am thinking of using an arduino boards PWM pins to send the voltage back to the board. I am stuck trying to figure out if a should be using a special fequency to calculate the duty cycle.

View attachment 292470

Did you have success doing this, I'm looking to do the same thing since my console bricked with the latest update.

 

Did you have success doing this, I'm looking to do the same thing since my console bricked with the latest update.

At this point I think I have found most of what I need besides the frequency if any I should be using on the analog out to the controller board for the motor. I am thinking of using an arduino boards PWM pins to send the voltage back to the board. I am stuck trying to figure out if a should be using a special fequency to calculate the duty cycle.

View attachment 292470

Also, I read in the notes of the document you reference that 60ms pulse spacing is ideal.

 

Just finished up my retrofit, works perfectly, here is the speed controller I used. I did have to set up a little voltage divider to turn the 12v into 5v max.

MiOYOOW PWM Frequency Generator, 1-Channel 1Hz-150KHz Adjustable Pulse Duty Cycle Function Generator, Square Wave Signal Generator Module with LCD Display and Rotary Switch https://a.co/d/2BCcsTh

 

Just finished up my retrofit, works perfectly, here is the speed controller I used. I did have to set up a little voltage divider to turn the 12v into 5v max.

MiOYOOW PWM Frequency Generator, 1-Channel 1Hz-150KHz Adjustable Pulse Duty Cycle Function Generator, Square Wave Signal Generator Module with LCD Display and Rotary Switch https://a.co/d/2BCcsTh

I just joined the bricked treadmill club too! My controller is a MC1648DLS. Did you just hook up to the blue wire/P terminal/pin 4 of the HD6 connector and ground?

 

I just joined the bricked treadmill club too! My controller is a MC1648DLS. Did you just hook up to the blue wire/P terminal/pin 4 of the HD6 connector and ground?

This video explains the wiring quite well. I did have to set up a pair of resisters in series to get my voltage down to 5v on the pwm signal output pin of the generator.