Plobot

And here is where I've spent my tears and sweat the last months...

Note how they are assembling crypto-currency servers. Of course they are not interested in my humble Plobot!

It has been a frustrating experience for the last 6 months or so to go to the assembly line. So many things went wrong that every time I talk with the people in the factory I am already in a defensive position, expecting them to bring more bad news. 

You will notice that sometimes now I will start using singular instead of plural. I virtually received no help from anyone that expressed interest in finishing the production and delivering the rewards. I had to pay to reprocess all PCBs and the endless list of problems that appeared during assembly. Design problems don't appear till you start production. It looks good, you hacked one or two or ten units. But then the mold doesn't fit the parts you specified, the electronics don't work as expected and the robots don't move as you programmed.

One of the saddest decisions was to glue the arms of the Plobots. Another critical moment I thought I was going to faint was when I realized that the construction bricks wouldn't fit on the back of the Plobots. I think that the rest of my remaining hair felt when I noticed that one in ten Plobots was able to scan the RFID cards.

But now I also have good news, I tested last week about 200pcs with an acceptance ratio of 0.8. This is the first time I see that finally we will be able to have the Plobots being shipped. That is super low but I will use the rest of the 0.2 I will use them for demos locally.

Aw!

We opened the mold finally. And outsourced the PCB to a studio. That was not a minor effort. They added an USB type C charger that is really fancy (and also almost drove me crazy because of EMI)

I also had some trouble tuning up the PID constants. The motors we got from the supplier were just too different from the ones we originally designed Plobot with. But, oh, well... it works!

It's fair to share that there is an amazing article that helped me to understand the coding structure that was used to implement the PID inside of the turning of Plobot. Here is a detailed PDF explaining it.

And the PID library itself, we used this open source approach that works surprisingly well. 

We got our latest design printed with SLA and you can tell the difference really. One of the issues to solve was interference with the ultrasound sensor. Here you can see how it looked before and the modification we introduced.

BTW, less technical, but we already surpassed the 50% of our Kickstarter campaign at http://ks.plobot.com ! Thanks for the support!

We just launched our Kickstarter campaign and we just got our first backer!

http://plobot.com

We recently have been in many fairs and events, showing how Plobot is a lot of fun. I post some pictures here showing how kids have a blast with coding. Please share them with your friends.

Quite hectic days for us. Photo shootings, film edition, marketing team ... this agenda is leaving us without time for hacking!

Fortunately we signed up 3 new schools and each time we play with kids it's a lot of fun.

We are live on a pre-campaign. Please take a look at the video and pictures. They look professional! Who knew we would look like this when we hot glued together the first prototype?

https://comingsoon-tech.com/plobot-kids-learn-code

Stickers and magic clay are the two tools we have been using. Pretty happy with the results.

We will host a summer camp with the Plobots. Here you can see the first of our cuties getting out of the hackerspace http://xinchejian.com

We are at the stage of getting feedback from parents and other teachers. Many things happened. Among them, a mom not convinced that we were not ready to sell yet, tried to bribe me saying outrageous prices. Interesting human behavior, it seems that her daughter really liked Plobot !