I am trying to drive a speedometer in an older car from an arduino. The new transmission has an electronic speed sensor. The old speedo takes 1000rpm / 60mph mechanical input.
Now i can get the steppers i have (a NEMA17 and a small motor from a printer) can brake 2krpm at 27 volts. Since i don't want to have 3x9 volts under the dash i attempted it again at 12 volts, and got about 400rpm peak.
Is there a stepper that will run at 2krpm at 12 volts? Or should i resort to a DC-DC converter? I don't have a DC motor encoder handy, and i am not interested in waiting for one to ship from China.
Any ideas? Thanks!