An Internet connection would be a valuable addition to many projects, but often designers are put off by the complexities involved. The NetWorker`, which consists of a small printed circuit board, a free software library and a ready-to-use microcontroller-based web server, solves these problems and allows beginners to add Internet connectivity to
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their projects. More experienced users will benefit from features such as SPI communications, power over Ethernet (PoE) and more. There are three key elements in connecting a device to an Ethernet network: the Ethernet connection hardware itself, the software library (called the stack`) responsible for handling the various protocol layers, and finally the top-level firmware functions. For example, to allow access to a device from anywhere in the world, it is possible to use a small web server running in a microcontroller. Compact ready-made modules are available on the market to cover the first two of these elements. They allow you to connect a microcontroller to a network without having to get involved in the gritty details of its protocols. However, programming against the libraries provided can be a daunting task for the beginner; and more experienced users often find it necessary to work around` the firmware provided with the module to enhance or modify it. The solution provided here hides the complexity of the network protocols from the application programmer, and is simple to extend and very versatile. The circuit is based around a Microchip PIC18-family microcontroller which includes a built-in Ethernet transceiver. The author has added a few new functions to the free C software library available from the manufacturer that implements the TCP/IP stack. The final element of the project is a web server running on the...
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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