Upgrading the Tinkering vending machine!

16

Sep / 19

16 Sep / 19

Posted by Ryoko

Tinkering is all about using what you have around and messing about with everyday materials, but for some projects, you need a special little bit of something that is hard to find. For that reason, we have set up a vending machine in the Tinkering Studio where you can purchase these materials and other fun items to get you inspired and help you tinker when you get home.

tinkering vending machine

Tinkering Vending Machine

A few examples of the products: Toothpick sculpture kit ($3), Paper circuits kit ($6), Sewn circuits kit ($6), and a hobby motor ($2.5)

This vending machine used to sell snacks, but Nicole turned it into a Tinkering vending machine when we moved to the current location. Ever since then, the vending machine has provided tinkering kits for visitors on the museum floor. People love our vending machine, but the only downside was that the machine only accepts one dollar bills. This summer we upgraded this vending machine so it can take credit cards. I am going to write the process of upgrading as a documentation in this blog.

Know Your Machine:

It is important to know your vending machine's make and model. Ours is especially old that it doesn't come with an MDB protocol mechanism.

Model: AP6600 Snack Machine
Manufacture: Automatic Products Company

Get a Credit Card reader:

Based on the model and make, we did a quick research and purchased a credit card reader from Parlevel Systems. Parlevel sells credit card installation kits that can be easily mounted to old vending machines like ours. The model we bought is Parlevel Pay Plus powered by Nayax. The device runs by a 4G cellular connection.

Upgrading the control board:

We also learned that we need to upgrade the vending machine’s control board (Usually called VMC: Vending Machine Controller). Before this project, I didn’t even know what the control board is, but soon I realized that it was like an arduino board that works as the brain of the machine (Well, it’s just bigger than those arduino projects that I’m familiar with…)

The important thing is to make sure that you get the right kind of the board. There are many similar upgrading boards available on the market, and we needed this particular one (Retrofit kit 6/7000 Machine) from a company called InOneTechnology because theirs is the only one in the industry that allows us to use old payment systems such as 110V pulse style coin/bill acceptors AND still let us add a new payment system such as a credit card reader through an MDB interface.

The control board is located inside of the vending machine door. At first, I was very intimidated to see all the circuitry on the board. I see 9 pin connectors, 6 pin connectors, ribbon cables, female-male connectors...etc. Ok, Where should I start!?

First things first, make sure you unplug the machine before you do any work to prevent electrical shock or damage to your machine. Then I disconnected all the wires and cables from the old board and took it down from the machine.

I also disconnected the coin acceptor, coin changer, and bill validator to access to the selection panel (the keypad). During this process, it was really helpful to watch InOneTechnology’s tutorial video.

Click here to watch the Youtube video.

The video’s instruction is very clear and thorough, and also I got every possible help from Arnie from InOneTechnology (who is starring in this video! Thank you so much Arnie!) I was amazed many times by his expertise: He was able to point out what I was doing wrong by just looking at a few pictures that I sent or talking a little over the phone. Thanks to his support, I was able to install a new control board and re-wire cables to each part successfuly. Once I started having a whole picture of the board wiring, such as what goes where, I felt much more comfortable dealing with this circuitry.

Here is how we connected everything:

It is kind of hard to see in this photo to know what goes where, so I've made a drawing (just for the sake of my understanding!) of how I wired things with the control board and also added a little note of what each one does.

(Click the image to enlarge)

Installing a Credit card reader:

If you were able to install the control board successfully, most of the upgrading work is done! All you have to do is to connect and mount a credit card reader. For this part, the video from Parlevel Plus was helpful. And the fun part was drilling a hole in the metal surface of the vending machine!

Powering up the machine:

Once you have successfully installed the control board and card reader, you can finally plug in and power up the vending machine. It was such a rewarding moment to see the machine turned on without any issue! (Since the machine was handling 110v voltage, I felt so nervous at the moment.) Having made sure that nothing blew up, I tested with coins and bills to see if the machine would work in the same way how it used to be. Then I tested with a couple of credit cards to see if the machine could process the payment. And it did! It was such a journey for me, as someone not an electronic technician, to go into the total unknown and tackle wiring in the world of the vending machine!

We are looking forward to seeing how this upgrading will have impacts on the vending machine sales and how it will eventually contribute to the idea that people will bring their tinkering experience home and continue "tinkering at home"!

The thrill of natural phenomena

16

Aug / 19

16 Aug / 19

Posted by Sebastian

Last week, I was reminded why I am so enamored with hands-on explorations grounded in phenomena: the physical world has rich explorations and entry points to offer to anyone, no matter their age or prior knowledge. Take shadows as a phenomenon, for example: since the start of our tinkering work years ago, we have been inviting kids and grown ups to explore light and shodow, create art and tell stories with our light play activity.

But it wasn't until recently — over the past couple of months — that we started to work with preschoolers as young as 3 to explore light. The young kids don't engage with our materials in the same way as the older participants. They are less focused on designing and completing a light vignette and more engaged in playing with the materials. But they are equally fascinated with the phenomenon. They are delighted when they discover that they can create a shadow of a star by holding it in front of a light block, even if they are just at the very beginning of understanding the concept of light and shadow.

The same week that my teammates were exploring shadows with preschoolers, I was invited to a math conference to collaborate with grown ups — mathematicians and education researchers — and explore complex geometric structures (tensegrities). On a whim, one participant held a geometric structure made of straws and rubber bands in front of the video projector and discovered that the shadow of the complex structure was unexpected, symmetric, and beautiful. Soon the whole group flocked around, intrigued by the different shadows of their 3D structures and fascinated by how light interacts with these complex 3D objects.

Just as much as the toddlers, we were fascinated, unable to stop exploring, thrilled, confused and surprised by what light and shadows revealed.

Over and over again, I am reminded that nothing compares to direct exposure to natural phenomena and that personally meaningful moments of learning arise naturally for all of us as we tinker with them. The youngest learners might not be able to put their discoveries into words, and some of the older ones might need a reminder that it's ok to play, but tinkering with natural phenomena seems to be part of our nature — no matter our age.

Stronger Silhouettes

10

Aug / 19

10 Aug / 19

Posted by Steph

After creating some new sillhouettes for lunar landing lightplay, I was on the lookout for a coating that would make the cardboard cutouts rigid and durable for use on the floor. I wanted to support the all of the clipping, propping, bending, and building – but also grew up in a desert and felt a special responsibility to protect the cactus cutouts from immediate destruction.

I consulted a couple of Exploratorium team members in the Tinkering Studio and the shop, who suggested I try out an acrylic polyurethane coating. I used Benjamin Moore Stays Clear (low lustre) and did a quick double dipping test to compare regular cardboard (1/8" cardboard with one white side) to varying layers of coated cardboard:

Visually, it's hard to tell the difference between the number of times the cardboard popsicle tests were dipped in Stays Clear. But you can feel a definite increase in rigidity of the double dipped cardboard. Future cactus cutouts will stand the test of time!

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