# [video] 1D Accelerometer

3,598

5

17

This is a test of a video Instructable. The whole process was filmed and edited down to the bare bone steps.

Project: Build a one dimension accelerometer from simple household supplies. Use it to see how many G's you are pulling in one direction. A better accelerometer (two dimension) is in the works, so sit tight.

Let me know how the concept of a video Instructable is. From what I have seen, there is more complete instruction and you can see how everything is done. The drawbacks are that you have to watch a video instead of reading, so it will take some more time.

### Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

## 17 Discussions

Question for you. Instead of adding additional nuts to mark the G ratings on the tube couldn't you just use the one nut? Example mark tube where +1G mark is flip it over mark where -1G is then measure space between +1G and -1G and place a zero G mark. Then you just measure the space between the zero G mark and +1G mark and and use that distance to mark the rest of the spaces out?

4 replies

is the rubber band "spring constant", well, constant for all stretch? is the force exerted by the rubber band with respect to how much it is stretched linear? i don't think it is. but we can confirm this by asking ""intoon"" if the spacing he got with the multiple-nut method is equal for each g-interval

correct me if this isnt answering your question but when you are adding another object(weight) of the same size it is doubling the weight of the object because weight is the force of gravity on an object so when weight is doubled it is equal to doubling g's...... g's r the how many more times weight is added(example: 2 g's equals 2x the weight of its normal weight under 1 earth gravity)......... hey u should probably know, most likely your older than me since im only 13.

there you go. you're correct. doubling the object doubles its weight, doubles its 'g'. unfortunately, the stretch of the rubberband is not linear. for example, to get to from 0g to 1g, the nut may move an inch. but to get from 1g to 2g, it may move less than an inch, as confirmed by intoon. therefore xenuthemagnificent's suggestion for calibrating the accelerometer wouldn't be very accurate.

The force exerted by the rubber band is not linear, and therefore the gap between G's gets smaller as the force gets greater. The only problem with this setup is that the rubber band builds up inertia with its springyness and therefore can botch the results. This will only work well on G forces that are sustained long enough for you to actually see a clear reading.

This is definitely the format I want to see dominate. Written instructions and diagrams are welcome too, but nothing can match the sheer bits of info in video representation, as carl sagan might say, billions and billions. This could change the world, you know?