The world is going nuts over the Raspberry Pi single-board computer (SBC) for being a whole system under $50. In reality though the Pi isn`t actually the cheapest computing device available. If you want really cheap how does $13. 50 sound for a mini computer that can plug into your PC`s USB port be programmed in C+ and let loose into the real worl
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d connected to all sorts of crazy stuff Welcome to the world of the PC-programmable microcontrollers. CPUs are the show ponies of the computing world they strut around showing off their high clock speeds but on their own they`re totally useless: they need a whole motherboard`s worth of bits to connect to real-world devices. On the other hand microcontrollers are compact self-contained bite-size devices that run their own complete computing device they have storage RAM and interface ports that work with sensors displays and switches. They run everything from fridges to cars and clock radios. Microcontrollers don`t run anywhere near as fast as CPUs the ones we`ll look at only clock at 16MHz but they`re not encumbered by layers of Windows operating system to strangle the life out of them either. Microcontrollers allow you to create complex gadgets at a fraction of the cost of using individual or discrete integrated circuits. However if you`re going to use microcontrollers a good working knowledge of electronics is required this series is all about real-world computing in the truest sense. Yep we`ll talk electronics theory get our inner geek on and look at voltages currents resistors and the like. But frankly I get bored with theory alone damn quick so this series will be all about getting your hands dirty and building stuff. And to do that as quickly as possible we`re going to use the excellent Arduino series of expandable...
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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