With the world`s non-renewable resources being consumed at an alarming rate, it`s no surprise that when the new curriculum was released, 2 ½ years ago, the word `environmental` appeared in the key concepts. The programme of study goes on to add that this includes the opportunity to explore issues relating to sustainability. Therefore, teachers are
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now looking for projects that allow students to consider sustainability, and, what better way to do this, than with a solar garden light. This project allows electronic construction, resistant materials, renewable energy and the study of designers, to be included in one scheme of work. This product is very similar to the solar garden lights that can be found in garden centres and hardware stores. During the day, a solar panel is used to charge up a rechargeable cell, and then at night, when the light level falls, the LED turns on allowing a path, step, or other feature to be illuminated. The soldering in the project is fairly simple as the circuit uses just 15 components and no ICs. Assuming students have practiced some soldering prior to assembling the board, any key stage 3 class, should find building it relatively straight forward. With the essential job of making the board complete, the rest of the scheme of work can be designed to cover as many areas as time allows. Students can either design an enclosure for the board to go in to, or, alternatively, if time is short, a large jar can be used to house the board. In this case, reuse / recycling can be added to the project. Renewable energy can be examined; just as solar, wind, hydro, or any other renewable energy sources could be studied. Maths can be included into the project by studying how long it takes to charge the battery. The electronics can be studied in more...
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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