Questions tagged [touch]

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What is the best way to sense if a climbing hold is being used by a climber?

I am designing a climbing wall game that gets what holds are being used as inputs. I'm currently planning on using a Kinect sensor to tell where hands are relative to holds and capacitive touch ...
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26 views

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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1answer
50 views

Can a capacitative touch switch provide multiple response levels?

After recently discovering the ESP32, I've been inspired to attempt my first electronics project. It will be a very simple wifi-enabled light. I thought I would take advantage of the capacitative ...
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1answer
47 views

What is this glassy black bulge on a keytar button chip? [duplicate]

I'm disassembling a non-functioning toy keytar. This is the chip behind a couple buttons, including an on/off button. What could the black, glassy bulge component be?
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PIC ADC always returns 0 when used as a touch switch(CTMU)

I use PIC18F45K22 and XC8 compiler. I've read Chapter19 of datasheet and AN1250 to use touch switch property of CTMU. I coded according to these documents, but ADC always returns 0. I share all the ...
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50 views

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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2answers
111 views

What type of touch button is this?

There's a touch button which has a spring on the PCB. Is it capacitive? How does it work? Do I need a special circuit to read touch events?
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2answers
52 views

ESP32 touch sensor outputs unstable values

I am trying to implement touch functionality of esp32 development board to toggle a led. But on uploading a simple touch detection sketch, output have spikes i.e. usually value remains near 100 but ...
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0answers
37 views

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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2answers
87 views

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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1answer
37 views

Question Regarding Capacitive Sensor IC

I have this Capacitive Sensor IC I am trying to understand and analyze how to use this IC. In the datasheet, on page 13 - Function description, it is mentioned as "There are four selectable non-...
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1answer
53 views

Question about capacitive sensor designs with direct touch to copper or aluminum

I've seen some DIY capacitive touch sensor projects where the sensors themselves are strips of aluminum or copper soldered to a non-grounded wire, where the user touches these strips directly with ...
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1answer
44 views

Finger touch signal detection with microcontroller

I use darlington transistor for detection of touching. Finger or hand touch to BASE, only make about 0.8-0.9V voltage on the EMITTER side. How can i increase this voltage level to 3V for detecting ...
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1answer
53 views

Understanding Touch Switch with BJTs and Relay

We worked on this circuit today in one of my labs and it had my groupmates and I puzzled. We had a 1k resistor in series with an LED on the NO side of the relay. I searched for the circuit online and ...
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1answer
41 views

How do I read a simple touch sensor value from Arduino? [closed]

I suppose instead of connecting to the LED it will connect to A3 on the Arduino for example but I'm having a hard time making it work. I don't know which point on the circuit should be connected to ...