How to Make Solar Cells using Transistors (2N3055)

hi folks one fun way to make a solar sail is to simply cut open a power transistor like I've done here I started with one of these transistors the 2n three zero five five to get at the so-called solar sail material you need to cut off the case very carefully because there are some delicate wires inside I find that if you have a shallow case like this one and it's best to cut near the backing and do many small cuts around the circumference that we have more control and you're less likely to slice the blade all the way through and cut those delicate wires if you have a deep case like this one that you can cut near the outer edge of the case without fear of damaging the wires the wires inside there those tiny little things are nice and protected the two and three zero five five is an NPN transistor it has two separate areas with n-type material and one with p-type material the n-type area is connected to this leg or pin called the emitter and the others connect to this leg called the base the p-type material is connected to the case itself and is called the collector to see which way of wiring you're worked best I did some tests by connecting at all the different possible ways and measuring both the voltage and the current we can see that connecting the circuit through the collector and base gave me the most power my experiments with sunlight we're done before these tests though and use a second best option with the two n-type areas the base and emitter connected together here's what I've done this is an NPN transistor so the collector and the emitter the two pins their legs on the back are the inside and the P is the base where the case of the transistor so there's my test setup I've got my digital meter and I'm going to hook the positive lead to the either base or collector or one of the legs in the back doesn't matter which they're both connected together and then the negative is going to the case see the electrons will flow from the positive to the negative okay so I've got it on the volt scale right now and what you're seeing right there is 0.41 volts so 400 millivolts if I go to the millivolt scale instead you can see it's 413 Mille volts right now what happens if I cover the solar cell we cover it you can see the voltage drops I'm just covering it more and more and more trying to really really cover it it's surprising how much have – how much you get even though it's still not complete you know try to cover it completely enough to give up the of zero okay so that's 200 millivolts with it covered and if I uncover it back to wrap 413 or sell for 20 now I'm going to put it on the change these around for measuring current okay switch the leads around right here so that I'm on the micro wrap scale and now I'm reading about 4000 micro amps which is 4 milliamps and if I cover it and you can see it drops right down that's 300 micro amps I'll uncover it and I'm back to around 4 milliamps so the total power is 4 milliamps times 0.4 millivolts which gives you about 1.6 watt milli watts 1.6 million I get this for now lens here so watch what happens when I focus light on it here's the normal current around 4.9 milliamps put the light on it RUP the five I'll try to focus it a little more a meter has trouble around just over five thousand micro amps I'll try switching to milliamps scale but that doesn't really help ya see it's not giving me a proper reading anyway no matter what I do nothing changes so that's no good of course if I switch to the Volt's scale where I'm at point four nine volts I put the light on it now put the light out again so these types of solar cells don't give a lot of power the best I got outdoors was around 500 millivolts and 5.5 milliamps which works out to 2.7 millions to power a single 15 watt compact fluorescent light bulb you need over 5,000 of them but you can power small desktop calculator as I'll show in another video well thanks for watching be sure and check out my youtube channel rimstarorg there you'll find my video on how I use a bunch of these transistors to power small calculator there's also a video on how to make a solar cell using just a copper sheet and some salty water and there are many other similar solar videos including one about our using a Fornell lens taken from a rear projection TV as a solar cooker and don't forget to subscribe if you like these videos or give a thumbs up or leave a question or comment below see you in a bit

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