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/diy/ - Do It Yourself

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1652156 No.1652156 [Reply] [Original]

What's the simplest and easiest way to get two devices to locate each other without using a GPS?

>> No.1652159

To get a useful answer you should describe what you are trying to build and where you want it to operate.

>> No.1652165

>>1652159

My neighbor down the street and I are digging holes that we plan to connect at a depth yet to be determined, but the number we have tossed around is approximately 500 feet. My understanding is that sometimes they construct tunnels by boring from each end and they manage to meat precisely at the center.

Since our holes will have a diameter of 2 feet and we're doing this work with hand tools we need all the accuracy we can get. We have purchased Arduino Nanos to help with instrumentation.

>> No.1652169

>>1652165
then say it in the OP you fucking retard
>I need help but I won't tell you details
how brain dead are you retards

>> No.1652171

>>1652156
Depends how dimensionally. For a tunnel a laser is probably best. Align two lasers above ground (i.e point them at each other, perhaps using a camera tripod) lower it into the ground at the same level ( just coordinate well)
Then the tunnel you dig will be perfectly straight towards the target. Make sure it's aligned properly and test for aligning mistakes repeatedly. Good luck, seems like a fun project.
Include the details in the Post ples.

>> No.1652179

>>1652156
Trying to get under the new wall, sombrero?

>> No.1652195

>>1652165
Remember to shore up your tunnel, a cheap method is to use wooden pallets. My wife's son and I did something similar for a school project.

>> No.1652196

>>1652165
Why do you keep posting, 2 foot X 500 foot deep by hand guy? And no there's nothing at sparkfun to help you. There is only sjws, traps and death.

>> No.1652213
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1652213

The actual OP here, I'm not the tunnel guy. I was basically trying to think of how to make 2 drones know where each other are. Cardinal direction is enough, but just having compasses say which direction they're facing doesn't tell you which is closer to a location. The tracking doesn't need to be perfect either. Something that's small and low-power is best.

>> No.1652217

>>1652213
Gyroscopes. Align the gyroscopes so that the drones are "facing" each other. With neutral controls, they should (generally) stay in alignment in flight. You'll have to figure out something else for distance, because you'll have to know if they're moving toward each other, or 180° out of phase.

>> No.1652242

>>1652213
what's your budget?

before GPS, ships used radiolocation but it probably won't be right for your use case.

what kind of tolerances do you need, and why can't you use gps?

>> No.1652261

>>1652213
One drone has three antennas, the other one sends a reptetive signal. You can determine direction of the other drone by checking signal timing or strength on each antenna. There are existing modules for this or projects on for example hackaday.

>> No.1652283

>>1652213
>what is rssi
Why won't op ever google?

>> No.1652287

>>1652283

OP status: REKT

>> No.1652289

>>1652283
Oh yes, googling something you've never heard of before. A very easy task.

>> No.1652294

>>1652213
http://wiki.flightgear.org/VOR

Which is what >>1652261 describes

>> No.1652295

>>1652289
No OP? U can't google "WiFi positioning system"? No creative bones in that cheese whiz body?

>> No.1652304

>>1652213
Idk why you don't want to use GPS, but there's a beta version of inav that can broadcast its location to other drones using 433MHz version of esp8266s. It's actually really cool and you should take a look, it's got the ability to display other drones position on hud

>> No.1652314

>>1652213
With line of sight ultrasonic triangulation is probably easiest.

Not really trivial though.

>> No.1652318

>>1652304
Higher the frequency, shorter the wavelength, rssi will drop the gps bubble to centimeters.

>> No.1652320

>>1652156
yell

>> No.1652327
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1652327

this ,

>> No.1652356

>>1652213
Look for papers on WhyCON or UVDAR

>> No.1652360
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1652360

Just as I thought. Once I explained what I was hoping to do in more detail everything went to shit. I'll just go with a damn LiFi positioning system

>> No.1652369

>>1652360
You didn't explain fuck all. No serious details in op nor did you use trip codes. No budget. No max parameters. You just whined. People even suggested viable options with what little you did divulge. Fuck you.

>> No.1652890

>>1652369
>People even suggested viable options with what little you did divulge. Fuck you.
You don't understand. OP wanted a detailed blueprint to a ready solution. Not just a simple and useful answer to base his own adaption on. A preassembled product with USB would hace been best. Why should he have to do anything? This is /diy/ after all.

>> No.1654168

>>1652165
There are high precision IMUs you could purchase for this but i don't suggest digging vietcong tunnels all over your properties anon

>> No.1654214

>>1652165
/diy/ really has some of the stupidest memes.

>> No.1654225

>>1652890
This , kek

>> No.1654226

>>1652195
>shore up your tunnel, a cheap method is to use wooden pallets.
Was this getting into murrika