The interaction design for the singing pig was to have a different song start playing when a different wig is placed on the pig. The pig needed to stand by itself without being connected to anything else and the wigs needed to look like nothing out of the ordinary (ordinary wigs for pigs, that is). I wanted the way the wigs attach to the pig to be
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no different than any other stuffed toy, but they also need to pass current and electrically trigger events on an Arduino. Metal snaps were my go-to item as they very nicely interface between hard components (things you normally associate with a circuit) and soft components (conductive thread). The circuit is quite simple: an Arduino controlling a pair of LEDs in parallel on the same pin; a buzzer on another pin; and three digital switches with pull down resistors on three other pins. Below is an early prototype on a breadboard: Excluding the Arduino and 9v battery, all of the components were attached to the inside of the pig or wigs. Only sewing snaps, the LED eyes, and the on/off switch were exposed to the outside of the toy. Conductive thread was used for runs between components and to connect the snaps to the interior circuit, but since the circuit centered around an Arduino Uno, the soft circuit needed to interface with header pin connections. To do this, wire was stripped and looped around needle-nosed pliers at one end and then sewn into the circuit. The other end of the wire then connected to the Arduino. This was not the original intention I had wanted to use an Arduino Mini Pro and solder the connections into place, but that proved to be too ambitious within the Christmas deadline. Inside each wig was a wire sewn to two male snaps. I used wire instead of conductive thread because it`s a more robust material...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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