HiLetgo 10pcs TTP223B Capacitive Touch Switch Module Touch Sensor Switch Digital Capacitive Touch Sensor Switch DC 2~5.5V

I am satisfied with these sensors- touch triggers through 1/4" of plexiglass.

The HiLetgo TTP223B touch sensor can be powered and connected direct to a Sprite video player to trigger a file to play. You can add a strip of copper tape for a longer / larger touch area. It will sense a touch through 1/4 plexiglass. It is self-calibrating, plug and play.

A hint for raspberry pi 5 users, set the pull up resistor to false. An example: touch = Button(|Insert Pin|, bounce_time=0.5, pull_up=False)

These are great little momentary touch sensors - simple, responsive, pre-soldered and high quality. Plus, they look cool enough to leave exposed in projects. As others have pointed out, the hardware can be modded to act as a toggle switch if that's what you're looking for - or you can just handle this with some code. I've very happy with these little switches and look forward to incorporating them into my projects.

I have not tested these with arduino RPi yet, however I connected to my bench psu and it works great at 5v or 3.3. These are momentary buttons, just like a typically tactile push button. They are not toggle button/switches out of the package.BUT! When I saw a review from AARON A MONFILS <huge thanks to Aaron for sharing that> (he soldered a jumper wire to the VCC header to pin 4 (I think he called it pin 6, however the data sheet pinout called it pin 4) of the 223 chip to make it toggle, so I looked up the 223 datasheet, and VCC goes to pin 5, in other words:Just add one drop of solder to connect pins 4 and 5 and you have a toggle switch! See my pics with pins 4 and 5 jumped.

Crap. 8 out of 10 burned up within minutes using 5v. The data sheet is worthless as far as actually explaining how to adjust sensitivity. Right out of the package they would not even sense through 1/16" plexiglass. If you wanted to have a curcuit board staring at you from your project these may be ok. I wasted 8 hours over and over removing and reinstalling these things. Right when you think they're working suddenly would burn out. The help from seller is worthless to. All they did was refer me to the useless broken english data sheet or you tube. And by the way NOBIDY on you tube are using these. Theyre all using the red ones with separate touch pad. Im getting those and tossing the last 2 of these i have in the trash. Dont buy

Work well less sensitive than other brands. These are built to be momentary switches. But can apparently be altered to latch. Has a led on the board that is lit as long as the board is powered on.

The data sheet for the TTP223B says recalibration will occur every 4 seconds normally. In other words, when there is no touch detected, it will recalibrate itself every 4 seconds. If a touch is detected, re-calibration will occur 16 seconds after releasing.In my tests I am able to sustain 10 seconds of touch before recalibration starts and the IC starts performing recalibration every 2-4 seconds. Once I release and touch again, I can get another 10 seconds before recalibration. I'm not entirely sure what's going on, but these buttons don't seem to be able to sustain long term touches but they are perfectly fine for short term. I can probably make use of them for certain things for that reason, but you should be aware that these do not perform as the data sheet states.