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I read about this article about solar lamp. Obviously I can bought the whole thing online by spending $30 something but I want to make it by myself.

I hope this is the right place to look for. I am not sure if this belong to another SE. I have no electrical experience except the little thing I learn from high school. With a proper instruction, I think I can build it by myself from the scratch.

I googled around for "DIY solar lamp" but I cannot find any page which am not using already made $1 solar road lamp, however, I want to bought the things including solar cell, diode, etc and assemble them by myself.

I found this article which seems to be teaching it but it is lacking the graph.

I've attached an schematic below which I found on the internet. It is about a solar lamp with a solar cell of size 25x18x5 cm, which I don't think could fit in a jar. I place it here for a reference. It is from Taiwan so it is Chinese. I've made a translation for you.

What I need is a instruction to build a solar lamp from scratch and it could fit in a small jar. Do you have any idea?

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up vote 2 down vote accepted

You want to look for "solar lamp schematic", it will give you many schematics for making one yourself on google.

Here is one Solar lamp schematic from http://www.talkingelectronics.com/projects/SolarLight/SolarLight.html which explains how and why it works, as well as having some variations on it.

The reason most people just use a dollar store solar light is because it's insanely cheaper then getting the parts yourself. Just buying the solar panel itself will cost you 5 bucks at radioshack, or a few bucks on ebay plus shipping time. Then you need the rechargeable battery, and the inductors. It's not very cost effective at this point.

But in essence, you only need a few parts. The solar cell which charges the battery during the day, the battery which runs the led at night, and a small control circuit to prevent the led from lighting up during the day.

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