Questions tagged [touch]
The touch tag has no usage guidance.
24 questions with no upvoted or accepted answers
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esp32 s2 touch sensor read
I have a problem with capacitive sensor. I have created PCB with 2 capacitive sensors. Everything is working fine and ESP32 s2 mini reading values as I expect while I powering up esp32 with type-c 5v, ...
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Is there a single cycle wave trigger circuit?
Is there a circuit design where if the input is high (at any length of time), the output will only be one cycle at a fix amount of time?
I'm currently working on a capacitive touch switch (I'll use ...
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Touch switch for hanging lamp (touching metal bar): Ideas?
A few years ago, we have bought an IKEA Glimt hanging lamp that operates with halogen lamps. It has a "touch dim" functionality, so when a person touches the metal bar of the lamp, it dims (...
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Waterproof capacitive touch-sensor issue
my goal is to develop a waterproof capacitive touch-sensor.
In many sources on the internet, it is said that a mutual-capacitance sensor can achieve this.
For example, in the TI Designs: TIDM-1021 ...
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Touch Screen Panel of Car Radio Set-up
The Touch Screen of Car Radio Setup was damaged and removed. HD 6.95 INCHES WIDE SCREEN TFT (HG-070) A capacitance touch screen was replaced with the IC GT911 6Pin. Its working good except the Icon on ...
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ATmega328 experiences freezing or hangs when the ceiling fan is turned on or off
I've been working on a project, but I've hit a snag. Every time I try to turn the ceiling fan on or off, ATmega328 gets hung/freezes. Let me break down the project for you, so you know what's going on ...
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What is this component and what function does it serve?
I am learning to build a touch switch using a TRIAC. I took apart a commercial switch that is activated by touching the thin white wire.
I identified all the components, except one (the one that I ...
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Need advice on tapping into touch screen connected to LCD
I'm hoping to get some advice on a technical issue I'm currently facing. I am attempting to tap into a touch screen that is connected to an LCD, but I'm feeling a bit confused about how to proceed. ...
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Electrical noise between dimmer circuit and halogen transformer output
I am currently building an ESP32-based dimmer control for halogen transformers.
The dimmer should be controlled by touching any part of the transformer output circuit. Thus, I somehow need to connect ...
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LED driver circuit works only when I touch it with my finger
I'm trying to convert an E14 RGB LED bulb to be able to power it from a lithium battery. Inside the bulb are 2 PCBs - a transformer and a LED driver - which are connected by 3 wires. Black and red are ...
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Odd 4x3 touch keypad performance using TTP229
I designed a 4x3 keypad using a TTP229-BSF and an ESP32. The board works perfectly when I put 4 mm plastic over the board.
But when I add 2.5 mm of plexiglass over the plastic, some of the keys (3, 6, ...
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Problem with TTP229-BSF using Arduino Uno
I'm trying to use a 16-channel capacitive touch sensor named TTP229-BSF with an Arduino Uno. I use the following code it works correctly when i touch directly but when i place two 4 mm plexiglass pads ...
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How to trigger cap touch sensor without touching it?
I have a device that has metal spring connected to microcontroller pin that has in-built cap touch sensing . This spring is used to turn the device on and off. I plan to place the device in ...
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Any glaring mistakes in I2C touch & OLED PCB design?
Would greatly appreciate any expertise/suggestions on solving this problem! In particular have I done anything glaringly stupid when it comes to my PCB design??
I'm trying to get touch control ...
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Touch pad Document
I tear down one touch pad and wonder what technology they used.
I am sharing picture of it.
Any one know what is used for touch sense ? (my guess is capacitive).
I am planning to design one by myself. ...
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Touch sensor selection
I am currently researching a touch/force sensor for my project. Purpose of this post is to get your help in sensor selection.
Below is the information about the project so that you can get insight ...
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Simulate capacitive touch sensitivity and noise immunity
Due to covid, we are limited in the time we can tune our touch designs before EMC tests.
The device we are using has a PC based analyzer that is connected to the device over a serial protocol. ...
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Multiple ESP8266-12E's with multiple touch sensors
I'm looking for some advice, and I'm not sure I'm barking up the right tree by using ESP8266 NodeMCU CP2102 ESP-12E's.
I am currently using Arduino IDE to program the 8266's. I have two 8266's that I ...
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Trying to identify a component in a 12 volt LED on/off touch switch
I'm wondering if anyone can help me identify what this 8 pin IC is, in a capacitive on/off touch switch I have. It is a soic or 8-VSSOP package. 64RX-Y is written on the bottom of the IC, nothing on ...
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Power ON-OFF Memory Logic Circuit
There is touch sense circuit that controls a SMPS circuit drives a power LED at output. When disconnect the energy while LED ON, if I reconnect the energy LED must start be as ON state. I need a ...
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What is the best way to achieve triggering a function on device contact?
Let's say I have a smart pen. It has a microcontroller that can communicate with my server. I want to have a really small and flat gadget (let's call it The Receiver) that when you touch it with that ...
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ESP32 - Touch sensors with 1 meter wires
I am trying to use the Touch sensitive pins of a ESP32. Problem is that between the ESP32 and the actual touch pads there is 1 meter of wire. without the cable attached the value is > 200, but as ...
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Bypass touch switch on humidifier circuit board
i have a simple humidifier that only powers on by a touch sensitive switch.
I need to bypass it because when the power is off after that the device doesnt start automatically.
I tried some things but ...
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Touch IC TTP223 hangs at 5V after working
I used a TTP223 IC operating on 5 V. I use the touch IC output (when high) to turn on the LED and (when low) to dim the LED. The LED is operated by the external 5 V. It uses only the touch IC output ...
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