Invisible Qr Code Project For Hackaday Competition

In this community we void warranties! So in true diy robotics fashion I am gutting a 2008 Rovio and putting modern EZ Robot equipment, ultrasonics, the QR code cams and LEDS and more.





















6 ply mdf wood glued together and clamped. I used a bandsaw to cut the shape of the body. A quick test fit shows I had to trim out the front so that the top will sit all the way down.

Wow that’s brilliant. Seriously absolutely brilliant!

Thankyou! Which part the invisible QR codes or the riser for more room?

Ok another run through the saw and this riser dropped some weight and gained about 2 inches of space.

Wood glue Tite Bond brand is painted onto the mdf, it soaks it up a bit and seals the surface. Next I can hit it with the sander and paint it to match the bottom of the robot









It usually takes two coats as the first coat is usually partially absorbed by wood when you are trying to seal it.

Two coats of PVA have dried and the look and texture is similar to plastic. It looks much better after it dries then the messy look before! Now I can give it a light sand and start mounting up sensors lights and stuff like that.

I setup a gofundme to help with the plane ticket to california , tickets are 340-400

https://www.gofundme.com/68cigk8

Coming along , ceiling cam and forward facing cam fitted. Installed a columating lens that gathers light from several small LEDs and focuses them into a clear circle on the ceiling. I didn’t get to the ultrasonics tonight, I ran out of time

Quick spray with Matt black so the spacer doesn’t stick out like a sore thumb, I really think this whole guy will be red eventually but I rather have him functioning before worrying about overall looks. The holes for the ultrasonics are a little off so I will likely fill then and redrill at a later time. I should have spent more time on this today , but I slacked off.... Such a slacker.















The ultrasonics where just sitting in the holes which is why they look all wonky.

Aaaaand from the rear

Looks great Josh! Bang up job as always You don't really notice the ultrasonic holes being off with the black color.

@Jeremie , Thanks, I really appreciate it! I took a couple days off from this bot, but I will go back at it tommorow on my day off.

What’s interesting is that this is a normally lit room , the light shows so bright through the camera the auto brightness adjust kicks in and the rest of the room looks dark










No led on at all , invisible

One 3 watt led , I have found I can undervolt it to 1 watt and it is still 80 percent the brightness. The led is a light purple glow to the human eye , but looks like the scorching sun through the cam.





With no QR code to focus on , the light just looks incredibly bright similar to the same nm laser diode I tested.

Moment of TRUTH , daytime QR code reading test. It is almost 11 am here and I am in the great room of the house which has 17 windows. The natural light overpowers indoor lights in here and I was able to get good QR code reading even with this level of light interference. Yes yes ! Pics or it didn’t happen!

Haven't commented on this post yet but rest assured I've been lurking in the shadows, haha. Very nice job, Josh! This is such a cool and original idea, great to see it working in an environment with lots of light. Great looking robot!

Thanks man! I appreciate the feedback, it will be fun to continue expanding this concept. I have soldered up several of these LEDS to use on other robots and such. Hopefully the EZ Robot camera will work well with them too.