How to Make A Solar Powered Fan!
12 Steps

## Step 5: Check the Schematic

Now before you run off and start soldering everything together, you should print out your schematic. I would suggest keeping it with you while you solder.

The problem with this is that the schematic is rather confusing. The schematic that I used is the one from the LT1073 datasheet (2nd picture). If you just printed that out, you would be in trouble though. The spots where the schematic tells you to connect don't exist on the actual chip.

So... to solve this problem, what you need is another diagram (The first picture). It tells you where the connections that are named in the second diagram are located on the chip.

The third and final picture shows you how to put your entire circuit together. It's pretty straight forward.
Remove these ads by Signing Up
maikel 1800 says: Feb 8, 2010. 4:40 AM
I dont understand The Schematic!
can yo explain it to me?
Samimy says: Jun 1, 2012. 4:30 AM
the solar board is 1.2v and 300mA.
the pc fan needs a voltage of 12V with at least 0.3A, (300mA) to run.

this circuit is a voltage doubler that doubles or triples the voltage to make the fan run, but the Power (watts) stays same, even smaller a little.

this system he made, makes the fan to run but not as fast as to generate a proper wind to be useful.
diy_bloke says: Jun 1, 2012. 1:08 AM
I am not the author and i know it is >2 years since your question, but what is it that you do not understand in the schematic?
there is a solarcell that charges batteries. The voltage from the batteries and solarcell is led to a chip that makes 12 volt out of 1.5 volt. The 12 volt drives a fan
diy_bloke says: Jun 1, 2012. 1:09 AM
Actually the next step explains
BCHurricane89 says: Dec 16, 2010. 4:36 PM
How come in your schematic, you only have a 1.5v battery, yet you are using 2 1.5v batteries, making it 3v. your schematic doesn't line up with the parts you are using.
diy_bloke says: Jun 1, 2012. 1:06 AM
probably a bit late, but let me do a suggestion: the batteries could be in parallel