Archive for the Home Made Lidar Category

Gag! Need a 12volt BEC as well

Posted in Home Made Lidar on January 18, 2018 by asteriondaedalus

So, for the final prototype I will likely need a 12volt BEC to drive the gimbal board – though I won’t need that for the bench.  What I am missing is an adjustable bench supply.  Still something that should have on my bench.  So, off to Jaycar on weekend.

Otherwise, here are the basic innards of the home made lidar.  The bore on the gimbal is not wide enough for the slip ring body, but that is not a problem – it will be accommodated by the way I mount the slip ring.


As for the Benewake TFmini Micro Lidar, I think I might play with a 3D print for the final prototype.  My geek sister has a 3D printer and I am most of the way through an online Blender course (specifically so I can fall into 3D printing design).  Otherwise, a short piece of aluminum angle should do.


Just for posterity the physical specs for the gimbal motor are:

Poles: 12N14P
Resistance: 10.0 omh
Weight: 41.42g
Wire: 0.19mm
Turn: 100T
Bottom holes center to center: 16mm and 19mm
Top holes center to center: 16mm (vendor website says 12mm in on place and 16mm in another).


Physical specs for the lidar are:




Posted in Home Made Lidar, The after market on January 3, 2018 by asteriondaedalus

So, mislaid the cable from my Benewake TFmini Micro Lidar.   What on earth is this socket type please?  Anyone?


I pinged 3XDR, from where I got the gadget, for a hint as to the connector type. He is kindly sending me one!  Otherwise, it’s a JST-GH 4-pin.  Used in pixhawk.


All good.  New cable on hand. I have the gimbal board too, and a 4 core slip ring, so just waiting on the gimbal motor (with the large bore).  To give a keyed position I have a line sensor so I will add a reflective line to the gimbal motor spindel.

Cheap lidar

Posted in Home Made Lidar, Sensing on December 9, 2017 by asteriondaedalus

So my Benewake TF Mini LiDAR turned up.


Now for the fun.

It has to rotate in a circle to create a scan.

I had an idea to mount either of a Seeeduino Film or an ESP8266, with battery, on a spindle to wirelessly send readings – all while it is spinning.

Then BOOM!

You can get “hollow” spindle gimbal motors with slip rings!  So, again a

So, you can attach the TF Mini to the spinning part of the gimbal motor and drive the motor and take readings.

All good but for one thing.  Currently the idea is a open-loop solution.  It will need to be keyed to at least one position (at least) so that the “beams” are relative to a direction.


So, being lazy I found a really cheap MEGA328P driven gimbal board, but I only want it for the gimbal driver and the ease of software hacking.


The beauty is is a clone of the Martinez toy, so it has code to manage the phases of the motor inputs.   Should be interesting as it looks like you only need a few functions to set it up to run a motor continuously, but who knows – I still have to read into the theory.