How-To Geek

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 warranty-voiding DIYer and all around geek. When he's not documenting mods and hacks he's doing his best to make sure a generation of college students graduate knowing they should put their pants on one leg at a time and go on to greatness, just like Bruce Dickinson. 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!

  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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