This project is a reuse of the project built in the Circuit Playground Express Perk-up Ears guide. It's a good example of how you can find new and interesting ways to reuse or extend an cool bit of hardware.

So if you built the perk-up ears headband from that guide, charge up the battery, and plug in the USB cable. Otherwise, work thought that guide to build the servo-ears headband.

Parts

This project uses a Circuit Playground Express, 2 servos, and a LiPo battery. Any size battery can be used, but the 1200 mAh model is a good balance between size and lifespan.

A Black woman's manicured hand holds a round microcontroller with lit up LEDs.
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
Micro servo with three pin cable
Tiny little servo can rotate approximately 180 degrees (90 in each direction) and works just like the standard kinds you're used to but smaller. You can use any servo...
$5.95
In Stock
Lithium Ion Polymer Battery 3.7v 1200mAh with JST 2-PH connector
Lithium-ion polymer (also known as 'lipo' or 'lipoly') batteries are thin, light, and powerful. The output ranges from 4.2V when completely charged to 3.7V. This...
Out of Stock
Group of Small Alligator Clip to Male Jumper Wires
When working with unusual non-header-friendly surfaces, these handy cables will be your best friends! No longer will you have long, cumbersome strands of alligator clips. These...
$3.95
In Stock

Supplies

  • Headband
  • Construction paper
  • Corrugated cardboard
  • Hot glue and glue gun
  • 2 rubber bands of an appropriate size
  • Felt, faux fur, or fabric as desired to cover the ears
  • Jumper wire with male pins if you want to solder to the CPX for a more robust connection
  • flexible/stranded wire to use as an actuator
  • 4 pieces of stiff wire (long male header pins work well) and wire to mechanically connect the servo 

This guide was first published on Sep 18, 2018. It was last updated on Mar 18, 2024.

This page (Overview) was last updated on Mar 08, 2024.

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