I have here an acre-counter or crop counter device like the lykketronic shown below, using two AA batteries. It arrived without working.

Upon opening its case, I found that the PCB is missing two components, and the area where these components were is scratched, as though someone removed them carelessly.

Here is a photograph of the main PCB. The top part (cropped) is just the LCD.

And a close-up of the corner missing the components.

I was able to find another identical device, and the components are intact. One is a coil of wire on a black spool with a rectangular top. The other is a rectangular box labeled "100-10L A9". Here is a general view:

And again the close-up, including the mystery wire coil component:

Is this wire coil a filter of some sort? An impedance? What does it do?

And what is the black box to its left? It looks like an SMD capacitor like this one at mouser, but I don't know how to interpret its label.

I am hoping to either replace or re-make the components to restore the PCB.

posted about 1 month ago

CC BY-SA 4.0

1mo ago by Nick Alexeev‭

Conrado‭

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