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Running Videos on a TI84 Calculator
Sonar Collar for Blind Dogs
Awesome Drawings with Your Calculator
You might want to look at the BlindSight devices at jordycanid.com
DIY Glow 3D Printer
Here is the link for the first one I found 4 years ago. Your is a fraction of the size. He actually used a back-up alarm package powered by AA's. It had a battery life of less than a day. Your's looks MUCH more practical! There is imaging SONAR available for dogs, but dogs with bad hearing can't use it. Yours would work for them if it vibrated or something like that. Don 't worry about 40khz. It is near the typical upper limit of canine hearing and most dogs are pretty insensitive to anything much above 35khz or so. If there is going to be a problem with 40khz it is that there is so much of it out there. If you can swap out for 75khz transducers that would eliminate that problem. FYI, I'm an engineer with some experience with both SONAR and RADAR.
Sorry! Here is the missing link! The big package on the side is full of AA's. I believe he mentioned that the dog has since passed, but I may be thinking of another one.
I have seen a number of very similar projects over the past 2-4 years (on Youtube, mostly). I think all were Arduino based, but used a much larger sensor array...car ba ckup stuff, I think! The thing they has in common was very short battery life. I know there are processors now that are much less power hungry. I also notice your sensor array is much smaller. What is the battery life like with an alkaline 9v?
On the contrary, although it outputs around 40khz (which is indeed in the dog's hearing ability although it's at the very high point) the bursts are extremely small and directional. Unless the sensor is pointed directly at the dogs ears (which it is not) they will not be able to hear the sound since even a quiet room will cover up whatever indistinguishable frequencies may be redirected toward the dog.
Dog Mood Detector (Raspberry Pi)
DIY MP3 to Cassette or Instrument to Cassette Adapter
Arduino Frequency Detection
Make your Own Text-To-Speech Program!!!
DIY Driving Simulator
Excuse me for my late reply, but my pc refused to open instructables:sOn the PCB you can see the two traces on the bottom left passing a resistor and ending at one pin of the electromagnet. The G (ground probably) is traced to the other pin of the magnet. It seemed logically to me that to make it stereo I had to solder the Left wire to the bottom right and the common ground to the top left+right. Sorry for the messy soldering, but before I wanted to solder it nicely, I wanted to try it first.
Hi, Thank you very much for your instructable! I bought a cheap cassette-adapter from china, but the downside was the mono sound... Resoldering some wires didn't do the trick,s o I bought another one, which suffered from the same problem. I soldered the electronics correctly, but I still keep hearing mono sound. Any idea what the problem might be?
I bought the one with the black cable first, the one with the red cable later.The paint sketch is the original situation in both of the adapters.
I bought the one with the black cable first, the one with the red cable later.In the attached paint sketch you can see the original situation: both wires soldered to one side of the electromagnet. I assumed the other side would be symmetric, so I soldered the left end of the circuit to the upper left pin, the right end to the upper right pin and the ground pins, well, to the ground of the circuit.
It cant pronounce roflcopter correctly
Movement and Speech Controlled Wifi Camera Bluetooth Car
3D Audio Graphing (MATLAB)
I wanna know how to change the voice. Because I wanna change it to Eric.
Morse Code Keyboard
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