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      Feb 19, 2018

Tag: Keep learning

Don’t-worry-clock for my toddler > part 1 < Arduino project
Don’t-worry-clock for my toddler > part 1 < Arduino project

“When are you coming back, Mommy?” – “Just look at your lights sweetheart.”

While squeezing his little arms tight around my neck, my little man whispers in my ear: “Mommy, when are you coming to pick me up? How long will it take until you’ll be back? I miss you, mommy. I don’t wanna…”  It gets me whenever something big like this happens.
Vico’s first day of school is coming up, so worries and stress lurk around the corner. This will be the first time he’ll set foot in a new school building, with a new teacher and new kids who probably are as equally nervous as Vico, which doesn’t help the situation at all. The biggest stress trigger for Vico is; not knowing when I’m coming back to pick him up. Time for an Arduino project to help my little boy through his first week(s?) of school!

Arduino - sketch backpack project image

Here’s the plan

In this blog post, I’ll tell you about my don’t-worry-clock Arduino project. Vico can’t tell time yet and I thought of a solution to help him with that, so he can get a sense of how long it’ll be until school is out. The plan is to use an Arduino microcontroller together with an 8×8 dot matrix module to create the countdown clock. I know what you’re thinking right now: “What are you talking about Francesca! This is too technical!” Don’t worry, it isn’t that complicated at all. The dot matrix is just an 8×8 grid with LED-lights, and the Arduino is a microcontroller that controls the LED lights. (You can read more about what an Arduino is, in my earlier article.)

Ardiuno by DFRobot

From idea to reality

First of all, I thought: “Ok Fran, think… How are you going to make this happen.” I am an Arduino newbie, so I had to figure out how the Arduino and the LEDs work before I could create a clock out of it. I decided to make a small animation that turned columns with 8 LEDs off with a certain delay. The idea behind this was that when all LED-columns are turned off, the school day is over. This animation was pretty easy to make with all the example code, and YouTube video’s out there on the internet.

Wireless power. But how?

I was wondering how to create wireless power because I want to build the LED clock inside or onto Vico’s backpack otherwise he wouldn’t be able to take it with him to school. The Internet to the rescue! While browsing around, I discovered Adafruit. A very very VERY cool New York City company, founded by Limor Fried, also known as Ladyada.

“Her goal was to create the best place online for learning electronics and making the great products for makers of all ages and skill levels.”

. After grinding through this gem of a website, I found a PowerBoost 500 Shield by Adafruit. A shield is a piece of hardware that you attach on top of the Arduino. It’s like an electronic lasagne. The Arduino gets its power from a 3,7 Volt Lithium Ion battery that connects to the shield, and there we go wireless power! #foreverlearning

Because of the amount of shipping and customs costs, I decided to search for a Dutch online electronics shop that sells Adafruit stuff, luckaly I found one, so now I can finish my toddler clock Arduino project!

Adruino project - Adafruit powerboost shield image

Above: PowerBoost Shield 500 by Adafruit (Some soldering needed, but don’t let that intimidate you. It’s just welding two pieces of metal together with a hot metal rod.)

After a very long wait, my shield and battery finally arrived and I can proudly say that I’ve made it! The night before his very first day of school my toddler clock came to life! Read all about it in part 2.

I really like to hear from you so leave a comment. What do you think about this toddler clock idea? If you have tips, questions or cool ideas, please let me know!

Robo cheers!


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