2 Watts from an old 2N3055 as a solarcell ?

[DeltaMan]

Well ,

things did Not go as I was expecting . Current seems to be Very Low even in Sunny days .

One cable was soldered to the Base of the transistor and the other on the Collector or the Emmiter (I am Not sure ) . After that , both were connected in series .
When exposed to the Sun , I could measure about 0,8 Volts . When the sunlight was enhanced with a Lense and focused on one of them , voltage seemed to rise up to 1 Volt .
The next step was to connect a Tiny DC Motor but when I did that , there was an Enormous drop in voltage (close to Zero) and the motor would Not move of course . That indicated that I didn't have any Wattage there .   

According to the power they had and the cost of them plus the cost of the lenses plus the man hours to fit everything together , I came to a conlusion that a Typical Solar Cell of the market would be way better .

Just my two cents .

DM

[triffid]

I had heard about this about 5 years back.I took a clear LED and focused some sunlight on it and got a couple of volts.Triffid

[lon92]

Did you say LED??

How did you do that??

[khabe]

About magnifying glass.
How many energy you can get direct from sun focused through 5" magnifying glass Relatively a lot of
http://www.coolschool.ca/lor/PH11/unit8/U08L04/conv1.gif
And then what about 2w you can get when using  2n3055 
It was somewhere in 1966 we tried with guys to "get electricity" with cut off tops transistors  ... no lenses of course
greetings,
khabe

[Paul-R]

I had heard about this about 5 years back.I took a clear LED and focused some sunlight on it and got a couple of volts...

...and how many amps (or mA )?
Paul.