Report of progress of homemade laser


I want to make homemade laser since last year and I tried to test materials, though I cannot make well.
And all I want to do is to load to drone by relasing from power cable.

Now I can make this by AC enable mobile power battery.

Here is reference movie:

Total weight of the laser is about 1.6kg.So this can be loaded to large type of drone.

Next time I will try to load this to drone.

Realtime laser by Beyond


Like this video, I found the way to conevrt video to laser in realtime, so write this article.
(I did it by etherdream before, but the quality of the scanner could not be used more reliably with practice than I thought.)


  • Pangolin Beyond(Ultimate) : enable “Tracer”
  • Virtualcam software like ManyCam


  • Use Tracer function by Beyond that converts webcam input to laser in realtime.
  • Some screen area handles as webcam input by using Manycam.



Get Pangolin Beyond. You must use Ultimate version of Beyond because you need “Tracer” function.


Donwload and install Manycam.
(ManyCam may install some adware, so you must uninstall adware and some doubt programs.If you avoid Manycam, You may download and install other application. I uninstalled adware.)

If you are good at Directshow, this may be useful:

I explained using Manycam.I bought Manycam “Standard” license.

Step3: setting ManyCam

Launch Manycam and configure VirtualCam.

Right-click on the side by side rectangle → Desktop-> Custom Area and so on.
A rectangle appears on the screen, and you can treat that area as Webcam input.

Step4: open video

Display the image/video you want to convert to laser is located in the rectangular area.

Step5: Open Tracer

Open from the menu Edit-> Tracer. At that time, you should open it with Empty Que selected.


Step6: open Webcam setting in Beyond

When you select from the menu, the “Realtime Video Tracer” window opens, so click the “Trace” button to open the Tracing window.
Open the Tracing window and click “Device”.


Step7: select Virtualcam

Select VirtualCam (“ManyCam Virtual Webcam” here) created with ManyCam etc. If the resolution is too large, the operation becomes heavy, so adjust it according to the PC specifications.


That’s all!
By setting this, it is possible to laserize the designated range of the screen in real time.

Crosstalk problem wireless devices and venue


I do not know if it’s fashion or not, but XBee or Bluetooth , Wifi etc. Recently, the use of wireless is increasing.
I think that it is becoming the direction to wirelessize as a global flow as well.

I think I will write about the problem of crosstalk which will always make troubles in using wireless devices this time.

I make and use a system that controls the lighting of the LED wirelessly.
Synchronization with sound is very important as it is live.
Even if it is misaligned, it will feel a big incongruity if it is not very small error such as 0.016 – 0.032 seconds.

In addition, LED wireless control basically uses XBee.
However, XBee communicates using the frequency of the 2.4 GHz band.
In the 2.4 GHz band, mobile phones and various Wifi devices (recently 5 GHz ones are still pretty much used but still more mainstream), Bluetooth devices, microwave ovens, etc. are running at the same frequency, and in some cases It becomes a confrontation of the frequency band.

As you can see from that, there is a high possibility of crowding at live shows and exhibitions, etc., where there are lots of people,
I am trying to preliminarily test it at a big venue.

By the way, as a result of the control equipment we made, the live at Tokyo gymnasium operated at the biggest venue without problems.
Of course, I was not able to enter the person yet, I brought the distance of the transmitter / receiver closer and made other ingenuity.

Besides that, at the exhibition which is done at the big site, etc., the distance between the booths is close, and there are many exhibits of wireless technology, I think whether it is the most severe environment in a sense.

Moreover, there are many cases where problems do not occur unless it is during the exhibition period, which is a risk factor.
On the setup day, although it was working without problems, it does not move as soon as it opens, even if it moves, the delay is severe, etc. happen.

In order not to panic with sudden troubles,
· Confirm the degree of crosstalk of radio during pre-session if possible
· When there are many radio disturbances, consider ways to create an environment to block wired or communication
· Prepare high-power radio equipment that can not beat the surrounding radio waves

It will be necessary.
The last one can not be handled without wireless qualification.

To that end, we have acquired wireless qualification .
It is something that I would like to be able to respond more flexibly, such as attaching a function that can be switched to another frequency band because I got the qualifications with much effort.

Please also take a look at the relevant page as well as a link to the explanation and related articles.
About XBee |



Recently I began to touch TouchDesigner.

I do not get used to Node-based programming environment…
How about a for loop? What if you have a fine conditional branch?
Also Quartz Composer, vvvv, TouchDesigner. Although I bought a Commercial Lisense a while ago I kept not using anything but it was easier than I thought when touching TouchDesigner as a trigger, so I decided to start earnestly.

At first, I made something that reacts to the sound.

And I tried replacing it with a laser.

You can use etherdream in TouchDesigner. At last it will be a choice other than Pangolin as this will make it easier to make the beam steady and I am looking forward to it personally.

I am planning to strengthen cooperation between sound and external equipment from now on.

Shuhei Matsuyama’s blog is a good starting point to study TouchDesigner.