You can use old stepper motor from old printer or floppy disk drive head track position and cordless drill:D
Only use the two wires out of the four on stepper motor.
A variable reluctance sensor (commonly called a VR sensor) is a transducer that measures changes in magnetic reluctance.
Interface circuits
VR sensors need waveform shaping for their output to be digitally readable....
I am not sure how to do it either but maybe I can steer you in the right direction at least.
Teensy 4.1 PIN #10 GPIO_B0_00 see schematic.
The issue is I cannot pass argument(!) to IOMUXC_PAD_SRE all I can do is...
I actually think you are missing one important piece of code for accessing RTC in the Teensy microcontroller in void setthetime(void).
void setthetime(void)
{
int Year = gps.date.year();
byte Month =...