Sunday, 2 November 2014

Make a Solar cell from defective transistor

Connecting 6 transistors in parallel series to form a small solar panel of 1.8 volts
Connecting 6 transistors in parallel series to form a small solar panel of 1.8 volts
Many words do not give proof of wise man, because the wise not to talk but when the need demand, and the words must be measured and for the need. Tales de Mileto.
For those who like to experience we offer this experiment for its conduct and experiment with solar cells or solar panels.
Solar Cell: silicon surface that converts energy from the light directly into electricity. The solar cells are also known as photovoltaic cells (photo + voltage). When exposed to light, the solar cells are effective sources of energy. Do not provide energy when it is dark. However, when exposed to light, energy can be stored wiring up the solar cells with rechargeable batteries.

The solar cells provide only voltage direct current (dc). That means that the flow always flowing in one direction (contrary to the ac, or alternating current, which continuously changes direction-that is the way in which distributes electricity in most of our homes).

On this occasion I will discuss making one fotocelda with transistors. Caution: The old germanium transistors contain toxic substances.

As stated in the beginning, the solar cells on its surface contain silicon transistors also some germanium.
For our project will use power transistors, such as 2N3055 (NPN) or other similar preference of those who have in your work bench.

Taking care of the case, proceed as follows:
1. We remove the top cap of tansistor, by way of letting discovered, their internal connections, as shown in the figure.
2. Then connect the collector to the issuer, in this way will only 2 points of connection.
The collector and the issuer will be based on positive and negative, the voltage delivered will be approximately 0.6 volts.
test: To verify the operation of the solar cell, we place so that sunlight falls on the remaining elements of the transistor discovered when we removed the lid that covered, and put a multimeter on pins.
It is obvious that this project will not serve to feed a small transistor radio, because the amperage is minimal, but you can understand the functioning of solar cells.
You could try to make a small solar charger interconnecting multiple transistors to obtain, for example, 1.8 volts with 3 transistors and in that time you see charging a battery Triple A , for example.

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