I want to measure length of foot using infrared.Need help!

[Ebald]

foot size measure

I am thinking of designing an electronic device that will measure your foot length and display the foot size in LCD or LED.

The first option i think of is using infrared because it seems to be easier to implement. Anyone out there can give me a suggestion on how to measure the foot size?

 

[Prototyp_V1.0]

how to measure a stepper motor

Rip apart a flatbed scanner and place an IR sender and receiver on the moving parts (you must probably modify å whole lot). Then you can make use of the stepper and make a simple program that counts how many step the stepper goes until the receiver get signal.

You need to know exactly how far the moving part goes for each step.

 

[Ebald]

Re: I want to measure length of foot using infrared.Need hel

can you please explain what a stepper is?

 

[Prototyp_V1.0]

Re: I want to measure length of foot using infrared.Need hel

It's well documented on wikipedia:
https://en.wikipedia.org/wiki/Stepper_motor

Also you can read this pdf file
**broken link removed**

 

[ark5230]

An easier way is to procure a 1.2 MB discarded floppy disk drive. This has a stepper motor which can be used as four phase stepper motor with 1.8 degree per step. It works at 12 v rest of the features suit most of typical experimental working range.

 

[Prototyp_V1.0]

Re: I want to measure length of foot using infrared.Need hel

An easier way is to procure a 1.2 MB discarded floppy disk drive. This has a stepper motor which can be used as four phase stepper motor with 1.8 degree per step. It works at 12 v rest of the features suit most of typical experimental working range.

Good idea

Maybe a floppy drive can be used directly (without unmounting the stepper itself).