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analogdial

wrote:

I ordered a small amplifier board on ebay. It's just a PCB with
components, making a ready to go low powered audio amplifier, complete
with a volume control.

It has three screw terminal blocks to attach the Power, Input and
Output. It also has a 1/8" jack.

But here is the problem. Those screw blocks are labelled in Chinese.
Using the actual chinese alphabet. If it was another language, I could
convert the words online, but I cant enter chinese characters.

Fortunately, the power one says 12v with a + on one side, so I know that
is the 12v source. But I hav no clue which of the other two are input or
output, nor what that 1/8" plug is for.

I bought this from a US seller. You would think he would include a piece
of paper showing what is what. The entire amp is mostly just one IC
chip. Both the input and output go right to this chip, and there are
parts in the way of the chip to try to read the chip numbers. (which
likely would not match anything anyhow). [not to mention I cant see well
enough to read chips anymore].

What is most weird, there is a LED on the board which says "LED" and the
caps have numbers next to them (in english).

I plan to contact the seller to ask for an email containing the
schematic or a photo showing what is what.....

This is the first time I have ever run across a PCB labeled in
chinese...

Most of these Chinese kits don't have an instruction sheet. They are
the collection of parts from some construction article or something
like. that

Do an internet search for whatever identifiers you have. It might be as
simple as a circuit from the IC's data sheet. I've got a couple of
other these Chinese kits and there was alot of very complete information
on the web including youtube videos.

There might be pictures of the completed amp from the vendor's website.

The vendor might not have a clue as to what the parts in a bag are for.