A solar charger for an iPod is no more difficult than making our Solar battery charger. Built in iPod batteries are 3. 7 Volts with the capacity (measured in mAh) dependent on the type of iPod - e. g. 1, 200mAh for a 2nd Gen, 850mAh for a 3rd Gen, 500mAh for the Mini iPod, and 400mAh for the Nano. In our instructions for making a solar battery charger for AA and AAA
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batteries we made a current limiting circuit. Because the iPod range has batteries of a wide selection of capacities, our solar iPod charger is instead voltage limited. Since iPods can be charged via a USB port with a fixed 5 Volts DC, this is the voltage we will use. Please scroll down to the bottom of this article for details on commercially available Solar iPod Chargers if you are not interested in finding out how to make your own. To make our iPod solar charger we used a 250mA 6 Volt Solar Panel (available in the REUK Shop ). Even in the brightest sunshine the voltage is not excessively above that of the iPod battery, and the current is plenty enough to charge the battery in a few hours in bright conditions (even in the UK!). A blocking diode should be used (in the positive solar panel lead) to prevent the iPod battery from slowly draining at night if it is still connected to the panel. Unforunately this results in up to 0. 7 Volts being lost as heat in the diode, so it can be left out if you prefer to have a faster charger which will charge the battery in lower light conditions. Since our desired charging voltage is 5 Volts, we see that ideally R2 would be 270 * (5/1. 25) -1) = 810 Ohms. This is not a standard resistor size, however we had an 820 Ohm resistor which should result in an output voltage of 5. 05 Volts. Wiring up the above circuit on a prototyping breadboard with a 270 Ohm R1 resistor, and 820 Ohm R2...
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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