Build a paper craft hack a day logo, powered by a Circuit Playground Express!

 

This project is a great use of our customizable paper enclosure for the Circuit Playground. We'll use alligator clips for all of the connections so it requires no soldering! Perfect for workshops and class room settings!

 

The two buttons on the Circuit Playground control the direction of the spinning wrenches but you can easy modify the code to respond to any of the on board sensors! 

circuit_playground_parts.jpg

circuit_playground_servo-parts.jpg

1 x .8mm Chipboard
.8mm Chipboard
1 x 1.6mm Chipboard
1.6mm Chipboard

Circuit Playground Express

PRODUCT ID: 3333
Circuit Playground Express is the next step towards a perfect introduction to electronics and programming. We've taken the original Circuit Playground Classic and...
$24.95
IN STOCK

Circuit Playground Bolt-On Kit

PRODUCT ID: 3816
You have a Circuit Playground Express, but you need to mount it to your charming cardboard robot friend, eh? Not so easy if you...
$3.95
IN STOCK

Small Alligator Clip to Male Jumper Wire Bundle - 12 Pieces

PRODUCT ID: 3255
For bread-boarding with unusual non-header-friendly surfaces, these cables will be your best friends! No longer will you have long strands of alligator clips that are grabbing little...
$7.95
IN STOCK

Continuous Rotation Micro Servo

PRODUCT ID: 2442
Need to make a tiny robot? This little micro servo rotates 360 degrees fully forward or backwards, instead of moving to a single position. You can use any servo code, hardware...
$7.50
IN STOCK

3 x AAA Battery Holder with On/Off Switch and 2-Pin JST

PRODUCT ID: 727
This battery holder connects 3 AAA batteries together in series for powering all kinds of projects. We spec'd these out because the box is slim, and 3 AAA's add up to about...
$1.95
IN STOCK

Circuit Diagram

Ground (Brown) connects to GND on the Circuit Playground

Power (Red) connects to VOUT

Signal (Yellow) connects to A1

Battery connects to the JST port on the Circuit Playground Express

The Makecode activates the claw when the Circuit Playground Express detects light. Use the link below to open the code in a modern web browser:

WebUSB Direct Download

MakeCode can load a program direct to your Circuit Playground Express with WebUSB using the Chrome web browser - see this guide page on setting that up.

Then visit the code for the project here: https://makecode.com/_f5MREEYjv7qf

This means code edit will upload directly to the Circuit Playground Express without the need to drag and drop file onto it!

Follow the instruction to set up your board and you'll be able to quickly send code to Circuit Playground Express! 

Cut Shapes 

 

Download and cut the parts out with scissors or use a cutting machine. The svg files are arranged in layers, so its easy to set up!  

 

We used card stock (210gsm) for the black and white colors. 

 

The help stiffen the skull and wrench parts, we used a 1.6mm thick chipboard.

Box assemble

Cut out the box design and assemble the folds. The Circuit Playground Express mounts to the top of the box with four  M3 Screws and M3 female standoffs. The battery sits inside the box with the wires routing through the port on the side. 

 

We used .8mm thick chipboard for the box and the pole part.

 

Circuit Playground Express 

We used alligator clips to connect the pins but soldering would be fine. You can rout the wires for the CircuitPlayground Express through the center of the mounting holes for the Circuit playground Express.

Score, Cut, Fold 

 

First we'll start out by adding cut scores to our bend lines on the pole part. we used a hobby knife to carefully add a slight cut to each fold mark. cut less then half of the thickness of the chipboard.

 

Now we can flip the part over and carefully bend each cut sore. Make sure to apply a good amount of pressure to add a sharp fold. The box will not fully close if the folds are weak. 

Box: Sore, fold 

 

 Next we'll do the same to the enclosure box. Use a ruler to make sure all of the cut scores are aligned and even.

 

Apply as much pressure as you can when folding the flaps and each side of the box. We'll need each side to have a clean crease or the box will not keep its shape when folded. 

Servo Mount 

 

The Continuous Rotation Micro Servo mounts into the center of the skull part.

 

We stacked three 1.6mm chipboard pieces to build up the center mount to tightly fit the servo in place. The tolerances are tight enough to allow the servo to press fit into place without any glue.

 

Next we'll stack the black and white card stock pieces on top of the chipboard piece. Apply glue to each part to adhere each layer.

Wrench and Servo horn 

 

Stack the black and white card stock layers on top of the chipboard piece. 

 

The white card stock piece prints with a center circle to indicate were to align the servo horn.

 

Align a circular horn and create the holes to fasten two M2x5mm screws to the Wrench part ( both horn and screws included with servo). 

 

Later we'll use the longer M2x9mm screw to fasten the horn to the servo gear. Insert the screw from the back of the Wrench part, through the servo horn and into the servo gear.

 

 

 

Circuit Playground Box 

 

We the can use four of the M3 screws in the Bolt-On Kit to secure the the Circuit Playground to the box. 

 

Align the Circuit Playground to the JST port next to the battery cutout. We'll use it to pass the wires through the enclosure.

 

 

Thread wires 

 

Now we can start to thread our alligator clips, battery wire and servo wires through the cutout under the Circuit Playground. 

 

At this point we'll want to connect the alligator clips to the servo pins. Double check each connection is going to the correct pins on the Circuit Playground.

Plug in Battery 

 

Connect the alligator clips to the correct pins on the Circuit Playground. Make sure each clip has a solid grip on each pad.

 

Plug the battery into the JST port on the Circuit Playground. Excess wire can be tucked back into the enclosure.

 

Pole insert 

 

Next we can insert the Pole part into to the cutaway above the JST port. Pass the end into the endstop part. Align the part to keep the pole part centered. 

 

Servo mount 

 

Lastly, we can mount the servo to the top side of the Pole part with an M2x9mm screw. Thread the excess wire behind the pole part and back into the enclosure. We can use the wire to wedge the pole between the enclosure to straighten the pole upright.  

This guide was first published on May 29, 2018. It was last updated on May 29, 2018.