Find all your DIY electronics in the MakerShed. 3D Printing, Kits, Arduino, Raspberry Pi, Books & more!


I have 2 really cool projects for this weeks How-to Tuesday. The first one is the Drawdio developed by Adafruit Industries and Jay Silver, the other build is a modification of the Drawdio that I call “Unruly”. These are great projects to make with your kids. Although, when you are done you most likely will not be too willing to share it. It’s just that much fun!

OK, let’s get started making the Drawdio.

What you need:

Tools you need:

Step 1: Take inventory

IMG_5290.jpg

Spread out all the parts and take a look through the instructions. It’s always a good idea to check out all the steps prior to starting.

Step 2: Soldering the resistors and capacitors

IMG_5291.JPG

I started by adding both resistors and both capacitors. There is plenty of room to solder them in at the same time. Make sure you read the instructions carefully, the resistors look similar, but they are different.Step 3: Add the low voltage 555 timer

IMG_5292.JPG

Next, I added the low voltage 555 timer IC. Make sure to insert the IC the proper way. The silkscreen of the chip on the circuit board has a little notch in the top. That notch corresponds with the circle/dot imprinted on the IC.

IMG_5294.JPG

Now you can go ahead and solder all (8) pins.

Step 4: Solder the two electrolytic capacitors

IMG_5296.JPG

Now it’s time to add the two electrolytic capacitors. Electrolytic capacitors are polarized so orientation matters! The longer lead is positive (+) and should be inserted in the hole marked (+). Fold the capacitors down prior to soldering. It is important that they lay flat.

Step 5: Adding the transistors

IMG_5298.JPG

Now it’s time to add the (2) transistors. They are NOT the same. Be sure to read the detailed instructions describing which one is the NPN and which is the PNP.

IMG_5300.JPG

Now that you have soldered them in, go ahead and bend them so they lay flat on the circuit board.

Step 6: Wire the speaker

IMG_5302.JPG

Cut (2) pieces of wire (supplied with the kit) and solder one to each of the solder points on the speaker. The other end of the wire gets soldered to the Drawdio where it is marked “SPK”. Easy!

Step 7: Connect the battery

IMG_5304.JPG

Now it’s time to add power. The battery pack is soldered right on top of the components on the circuit board. Make sure to orient it properly. The battery holder is marked with a (+) and (-), so is the board. It makes a nice small package that can easily be attached to the pencil.

IMG_5306.jpg

All done with the electronics, now it’s time to attach it to the pencil.

Step 8: Attach it to the pencil

IMG_5308.JPG

First, zip tie the board to the pencil. Simple!

IMG_5309.jpg

Now run a small piece of the supplied copper tape from the end of the circuit board to the end of the pencil. Now press the thumbtack into the end of the pencil. This makes an electrical connection to the pencil’s core of graphite.

IMG_5311.JPG

I wrapper the speaker wire around the pencil, you can bend it any way you want. Don’t bend it too much or it could come unsoldered.

Step 9: Last step, and you are all done

IMG_5315.JPG

Finally, attach the rest of the supplied copper take to the bottom pad of the Drawdio board and wrap it around the pencil. Now turn it on and give it a try!

Bonus: Meet Unruly

Unruly was born from Drawdio. I’m not really sure how it happened since I keep all my open source kits separate, but somehow Drawdio spawned Unruly.

What you need:

  • Drawdio Kit – Available in the Maker Shed

  • (1) Quarter – Available at the bank ;)
  • (8) Pennies – See above
  • (7) 100k Ohm resistors
  • Scrap wire
  • Wooden Ruler – NOT a metal one!

Unruly is almost the same as Drawdio. In fact, you can build it the exact same way as described in the directions, or you can modify it a bit like I did. If you plan on using the Drawdio on a pencil, don’t follow my modifications. Just build it according to the standard directions.

Step 1: Build the Drawdio kit

IMG_5332.JPG

Follow the instructions for making the Drawdio. There is only one modification that I did to the board it was the battery location. See step 2 for more information.

Step 2: Modify the Battery location

IMG_5335.JPG

Solder the battery on the back of the board, it makes it a bit better for mounting the finished Unruly to the ruler.

Step 3: Tin the money

IMG_5336.JPG

Solder 1 scrap piece of wire to a quarter. You need to really heat up the quarter for the solder to flow so I used a scrap piece of wood so I didn’t burn my table.

IMG_5339.JPG

Next, go ahead and pre-tin the pennies. You might want to scuff them up a bit so the solder really sticks.

Step 4: Solder the resistors and attach to the ruler

IMG_5338.JPG

Now it’s time to solder all the resistors to the pennies. Between each penny is (1) 100k Ohm resistor. Keep soldering all (8) pennies with (1) resistor in between each of them, creating a long chain of pennies and resistors. Do not attach the quarter to the pennies.

IMG_5347.JPG

Once you are done, hot glue, or epoxy the quarter at one end of the ruler, running the wire in the “track” of the ruler to the opposite side. Make sure the solder is on the bottom of the quarter and against the ruler.

IMG_5341.JPG

Next, hot glue, or epoxy, the pennies in the center of the ruler. Make sure the solder is on the bottom of the pennies and against the ruler. This makes it safe for kids, and adults, to play. No need to worry about constantly touching the solder.

Step 6: Attach the Drawdio

IMG_5344.JPG

Now you can zip-tie the Drawdio to the ruler. That was easy!

Step 7: Solder the wires

IMG_5343.JPG

Solder the wire from the quarter to the far end of the Drawdio.

IMG_5350.JPG

The other pad is soldered to the chain of pennies with a scarp piece of wire. Easy!

Step 8: Play!

IMG_5351.JPG

Turn it on and play! All you need to do is close the circuit by touching the quarter, then with your other hand touch the pennies to play a tune. Fun!

I hope you liked this weeks How-to Tuesday and my Unruly bonus build. See you next week!

In the Maker Shed:
Makershedsmall

1MKAD12-2.jpg

Drawdio Kit

Marc de Vinck

I’m currently working full time as the Dexter F. Baker Professor of Practice in Creativity in the Masters of Engineering in Technical Entrepreneurship Program at Lehigh University. I’m also an avid product designer, kit maker, author, father, tinkerer, and member of the MAKE Technical Advisory board.


Related
blog comments powered by Disqus

Related Supplies at Maker Shed

Follow

Get every new post delivered to your Inbox.

Join 26,453 other followers