Maker Projects The Evil Goat (Arduino Project) By William Lumpkins and Simone Giertz I EEE Consumer Electronics Magazine is built upon the principle of educating its readers in new research and new products and having fun in the world of the IEEE as it relates to consumer electronics (CE). We received this tutorial from a group of CE hobbyists, and we hope you enjoy it. This tutorial teaches you how to make your own plush toy with light-emitting diode (LED) eyes that can be controlled by an iPhone (Figure 1). It's the perfect Halloween scare! ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ one Light Blue Bean (http://punchthrough.myshopify.com/products/ bean), approximately US$30 a plush toy of your liking; we used a goat two common cathode RGB LEDs (common anode also works but requires a bit of extra effort) six 270-330-Ω resistors a 2 × AA battery holder two AA batteries wire and some heat-shrink tubing basic sewing gear a soldering iron a wire stripper. AA Battery Step 1: Get the partS AA Battery fiGure 1. The finished product: an evil goat. (Photo courtesy of Simone Giertz.) Connect the battery to the battery pin on the Bean and ground. Then, connect the RGB pins to pin 0-5 on the Bean with resistors in between and the cathode to ground. Insulate with heatshrink tubing. Step 3: perform SurGery Find a plush animal of your liking. Cut a hole in its abdomen and feel like a horrible human being for doing this to an innocent toy (Figure 5). Then, feel even worse when you remove its eyes (Figure 6). fiGure 5. Opening the goat to insert the electronics. (Photo courtesy of Simone Giertz.) fiGure 3. The internal electronics for the goat. (Image courtesy of Simone Giertz.) Step 2: Solder the ledS fiGure 2. All the parts gathered and ready for assembly. (Photo courtesy of Simone Giertz.) fiGure 6. The goat with no eyes. (Photo courtesy of Simone Giertz.) We will use the Light Blue Bean to control the two LED eyes. This is what you'll need (see Figures 2-4): fiGure 4. The battery wires connected to the LEDs. (Photo courtesy of Simone Giertz.) Digital Object Identifier 10.1109/MCE.2015.2422849 Date of publication: 15 July 2015 102 IEEE ConsumEr ElECtronICs magazInE ^ Step 4: add the electronicS july 2015 Put the LEDs, battery holder, and Bean in your toy and adjust the LEDs so that they fit in the eye sockets (Figures 7-9).http://punch http://through.myshopify.com/products/