Raspberry PI Zero v2

Recently the Raspberry foundation release a new Raspberry Zero (version 2). What is great about this version is that they have added the CSI camera connector. Now the Raspberry Zero does not have on on-board network interface, but you can easily attach a micro USB ethernet adapter.

Set cost:
- Raspberry Zero - 5 Euro
- Special Zero to camera adaptor - 5 euro
- Micro USB ethernet Adapter - 4 euro

Compared to the Raspberry Model 3 price of around 35 euros a big saving!

The latest firmware supports the Raspberry Zero V2 with both the 5 and 8 mp camera (v1.3 and v2 cameras).

I have tested multiple Micro USB ethernet adapters. I have found that Micro USB ethernet adapters based on the 88772a chip set work great. I have found that models based on the 9700 chip set DO NOT work!!! The 9700 chip set does seem to work for normal IP traffic, but does not seem to support the multicasting needed by the pi3dscan system.

disclaimer: It looks like the Raspberry Zero v2 is a great candidate for the pi3Dscanner, the only big down side it that it is currently very hard to get. Most suppliers have a "1 per customer" policy at the moment, but I do hope the production will go up and soon we will be able to order freely multiple devices.

As you can see from the below speed test, the Zero performs fine. Sure it is a bit slower then the Model 2 and 3, but is faster then B+ the model we started out with and has proven to work fine.

Important: Because of the speed difference between the various models, do NOT mix models in a single scanner, as this will give synchronization issues.

Comparing the old and new Raspberry PI camera

So here the initial results of comparing the old (v1.3) raspberry PI camera vs. the new (v2) raspberry camera. Besides the Megapixel difference (5mp vs 8mp) you can also clearly see from these images that the new camera is a wider (larger Field of View) camera. So while having more megapixels, if you shoot from the same distance if does not necessary mean you get more pixels from your subject.

One very big difference that is instantly visible is the difference in colors. The new v2 camera reproduces significantly better colors.

So is this an easy replacement for the older camera in the 3D scanner. I would say, not directly, To get the best out of the new camera, you would need to shoot closer to the subject. This will cause some challanges. Your poles will be closer, so it might start interfering with projection as they can really not move much closer then 1meter as you will not be able to cover the entire person.

Feel free to download the original source images (untouched). You will find the the images from the V2 camera are for some reason by default horizontally flipped. I will need to have a think about what this will mean for the current scanner design, so more to follow on this subject.

Download the original images here

New open source pole design - Preview

I started with my 3D Scanner design 3 years ago and I have learned a lot in those 3 years :-) I really wanted to design a new Scanner designed to be:
- Extremely Mobile, setup time needs to be less then 30 minutes
- Easy to assemble, ikea style design
- Easy to self-manufacture by people all over the world
- Cheap in material cost

Well I think I am almost there! So I thought I would give you a preview of my new Scanner Pole design.

The new poles are designed so that no single part is larger then 1 meter in length. This should make it fairly easy for people to locally source a Laser cutting or CNC service to have all the components made.

The material I am currently using is 3mm thick multiplex wood. It is very light and cheap and due to the design with inner rips is very strong structure.

Each pole has its own 5v / 10amp power supply to provide power to Raspberry units, 8 port gigabit networking switch and Fan. It also has an 24v / 2.5 amp power supply to supply power to the LED strips that are mounted on each pole (no in the current picture). The power supply can do current limit dimming (Not PWM) so you can have 5 levels of brightness for your LEDs without having any artifacts on your images (that you would have when using PWM dimming).

I am in the final stages of the design, finishing off the mounting to the ground plates and some other small details. I will be releasing all building files open source and free for anyone to use in what ever way they like. I will provide a full Bill of Materials list and will be able to provide some of the components if you want.

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