this post was submitted on 27 Sep 2025
22 points (95.8% liked)

Ask Electronics

3869 readers
1 users here now

For questions about component-level electronic circuits, tools and equipment.

Rules

1: Be nice.

2: Be on-topic (eg: Electronic, not electrical).

3: No commercial stuff, buying, selling or valuations.

4: Be safe.


founded 2 years ago
MODERATORS
 

Can anyone help me identify this touch sensor module from a UK home bathroom light switch?

The IC is a QT113 charge transfer touch sensor, the only writing on the board is SAT 02.

I'd like to know enough about it to order replacements.

https://sopuli.xyz/pictrs/image/256ab3e9-90b3-4e38-affe-5c716332cbc3.webp

you are viewing a single comment's thread
view the rest of the comments
[–] Tolstoy@lemmy.world 2 points 3 weeks ago

It's way out of my knowledge but it looks like the electrode for the touch is missing. It should be on the left corner where the "02" is printed on.

As you guessed the black thing is a transistor and should switch a led or probably a 5V relay. But please be careful since I'm guessing too xD