As usual, I haven't really had anything interesting to write so once again apologies for my extended breaks from posting. Unfortunately I don't see this changing anytime soon.
That being said, today I found this IR remote controller that re-defines what "cheap IR controller" actually means.
This came with (also extremely cheap) LED toy, and is used to toggle it on or off. And of course it broke immediately, after being thrown. There was no real damage, just battery had fallen off, but nevertheless.
There is nothing on the other side of the board. IR LED pins are under the board and those are pins at the bottom middle. Underneath the "cross" (battery holder, battery is not there currently) there is simple press-button dome, giving this conroller surprisingly good tactile sense (compared to usual rubber membranes); user presses down on the cross part, pressing battery against holder and button dome. No modulation, no signalling, just LED on or off.
The only component on the board is single diode seen on bottom left. There isn't even current limiting resistor anywhere! I guess they rely on internal rersistance of the battery there.
And yes, toy can be turned on and off with just about any remote controller one might have lying around. I tried few immediately when I saw what's inside this.
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