Arduino Project with Educational Materials

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hi,
based on request, have put complete how-to on arduinoinfo.info wiki here:  it looks this, , handheld ultrasonic distance sensor audio output (so it's kind of handheld bat):


the project announcement here:

also available instructable here:

this project linked section called  understanding science behind ultrasonic distance sensor (click):
that in turn links educational lesson plans , slideshow can used in classroom (my wife still updating that). if uses in class or helps teacher please let me know. may make low-cost parts kit available.
update: kit available  here:
disclaimer: mentioned stuff own shop...!!

any feedback or suggestions appreciated!

update: kit available  here:
also available instructable here:
disclaimer: mentioned stuff own shop...!!


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