I bought several solar lamps that look like this:

solar lamp

They have a flame effect.

Like all other such solar garden lamps the solar panel is too weak. When there is little sun in two days they are empty.

Since I already had one solar panel at home, I came up with the idea to connect all the solar lamps with that solar panel to additionally charge the batteries during the day.

At first I did it with only one garden lamp, purely for testing, and everything worked just fine until yesterday.

The lamp has stopped working even though the battery is full.

Now I'm afraid my solar panel fried something in the garden lamp.

The output voltage of the additional solar panel goes up to 12V depending on the intensity of the sun, and the built-in solar panel gives maximum 2V.

Since I don't want to fry other garden lamps, I ordered this:

Converter Step Down Module LM2596

With this I will adjust the additional solar panel gives maximum 2V, and in that way I will additionally charge the other garden lamps, everything will work fine regardless of whether there is enough sun.

Now I'm wondering for this one, which I fried in some way, can it be saved and what can I check?

Look at the pictures:

board 1

board 2

board 3

When I connect the AAA battery to that faulty garden lamp, just for a second, the two LEDs turn on and off immediately - the others LEDs don't work at all.

I don't know if the LEDs are damaged or if something else is wrong.

What can I check? What can I do ?

I'm not a professional, so if you can mark the pictures and explain it will be a little easier.

It's a shame to throw it away if it can be fixed

  • \$\begingroup\$ Questions on the use of electronic devices are off-topic as this site is intended specifically for questions on electronics design. - this is an electrical engineering design Q and A site and, unfortunately or not, asking questions about purchased goods with no name brand electronics and no schematics, is off-topic. \$\endgroup\$ – Andy aka Jan 10 at 15:01

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