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Roll Your Own Radar Gun With This Low-Cost Coffee Can Build

This informative guide both explains the principles of radar-based speed measurement and shows you how to build a radar gun/radar imager using coffee cans and electronics parts.

This multi-purpose build will help you do everything from measure the speed of moving objects to generating topographical images. Hit up the link below to read more.

Build a Small Radar System [MIT Open Courseware via MAKE]

Jason Fitzpatrick is a warranty-voiding DIYer who spends his days cracking opening cases and wrestling with code so you don't have to. If it can be modded, optimized, repurposed, or torn apart for fun he's interested (and probably already at the workbench taking it apart). You can follow him on if you'd like.

  • Published 01/19/12

Comments (4)

  1. jeepmanjr

    LOL! Simple, understandable, weekend garage project! I understood every word…not!

  2. LarGeo

    That was really deep..It almost made my head hurt!
    LOL

  3. Nic Houslip

    Needs more practice to get the key points across; adding the simple statement at the beginning that the frequency of a signal reflected from a moving object changes depending on the speed the object is moving toward or away from the receiver would make the story snappier. Remember the rules for Presentations. 1. The 5 Ps rule. Prior preparation prevents poor performance. 2. Tellthem’s rule. Tell them what you are going to tell them. Tell them. Then tell them what you told them.

  4. R

    Absolutely fantastic video. You did a great job. Very informative, and well presented. I actually found this vid while look for a way to make a radar gun of my own. I was hoping to get a schematic on how to actually make the hardware. But this explains the Dopper radar theory very well, and definitely helped my understanding of how the a radar gun actually works. Great job.

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