Domain seems to be down right now…

Sweet, hopefully it’ll help me once the page recovers from the DDoS :P I tried creating something similar a while back but gave up. Circuits like these seem more like voodoo than science *sigh*

Sigh… self hosting, through a DSL line no less. When will people learn? You can get a super cheap shared host for next to nothing now.

@golddigger

camera and a laser pointer on a stick. If you know the length of the stick and the angle of the laser pointer compared to the camera, it is just trig.

Smaller it is, the less accurate or more expensive it gets.

I like seeing an embedded arduino like this. I’ve built arduinos before and they work great. $6 can easily replace a $40 basicstamp or $30 arduino board.

very nice build

I’m building a Geocache GPS that I’ll be able to load coordinates into and track them down. Its like a reverse reverse geocache lol. It will have a standalone arduino like this.

Site is back up as of right now for anyone interested.

@adam
I hate trying to incorporate a whole arduino board into a project. Its a waste of money and connectors. The only 2 cases I can think of would be a very temporary project (arduino controlled xmas lights) or a dedicated shield to bootload other AVRs.

golddigger, zing-

A lot of cheap laser pointers can project designs like a smiley face or a star instead of just a dot. Measure the distance between star points or the eyes on the face.

@Rusty
Thank you very much

How similar is this technique to the ultrasound used in baby scans? Could this be used as a Diy scanner or would there be risks? 3mm precision sounds very promising and a fascinating project, good work.

@Lucassiglo21
Those look very nice. Have you considered selling them?

I recently had to purchase 5 high frequency ultrasonic capsules for a project. I found a site that sells them for $0.75 each (40 kHz), but with a minimum order quantity of 10. http://www.satistronics.com/basic-ultrasonic-sensor-16mm-diameter-rx-tx-one-pair_p2207.html

i am using a pic12f675, it sends the 40khz burst, and waits for the response from the RX amplifier, the ADC was too slow, so i am using an internal comparator and an internal voltage reference module to get the response.
i didn’t publish the code mainly because it is used for a sumo robot competition, and i want to use them there. and i would be the first one with homemade ultrasonic sensors there. if i release the code and the schematics i lose my advantage in the competition.
i am also selling them.

anyway, it’s not that hard to do it. and you have to calibrate the detection voltages versus time for the comparator, and that varies with the construction and sensor sensitivity, so even if i publish the code, it will be probably useless.