Questions tagged [button]
Please do not use this tag. Use a "switch" tag instead
434
questions
1
vote
1
answer
84
views
How to emulate a momentary push button with a SPST slide switch
My situation:
A power button (non-latching, 6 pins, but only 3 connected) on a board. When pressed, this button first bridges pins 1 and 2, then pins 2 and 3 and then returns to its original position.
...
- 11
0
votes
1
answer
40
views
micropython pyb module not found
I want to debounce a button in micropython and found this page on the micropython docs: https://docs.micropython.org/en/latest/pyboard/tutorial/debounce.html
It uses a library called pyb but my ...
- 149
2
votes
3
answers
1k
views
How do input pins work?
I am trying to understand properly how buttons work with the pico; I can make them work but I don't understand why it works or if it is the right approach.
I get that I need to add Pin.IN when ...
- 149
0
votes
2
answers
63
views
Toggle switch from button and capacitor
In my head I see it something like this:
What it must to do? When I push button first, capacitor will charge and LED will emit(B->C in transistor). Before capacitor will be discharged and while ...
0
votes
0
answers
48
views
Dimmer circuit for LED brightness control
I have a circuit using 555 timer with 2 tact switches to increase and decrease the brightness of LED, but what I need is to store the last state of circuit whether it is on/ off and also automatically ...
- 1
0
votes
3
answers
89
views
Car button - Switch current impulse to relay
I will add momentary push button to car infotainment panel (instead of blank).
It's VW/Audi original button which I want to use to switch relay (ys-rt1c - Timer delay turn off) to supply 12 V for rear ...
- 1
0
votes
0
answers
20
views
Wiring of buttons in solenoid and PIR sensor
Folks, have been working on the project and I'd appreciate any help with checking if everything wired correctly and if there's anything needs to be added or is redundant.
Project is straightforward: ...
- 1
0
votes
1
answer
42
views
Double function reset button, one physical and one by another MCU
I am facing a little problem on a CPB project on a reset function because a need one physical button and one programmable one by an output pin of an Annex MCU. How can I manage the positive signal ...
- 47
2
votes
7
answers
461
views
A circuit that temporarily keeps the toy on after pressing the button
I'm working on a project to add a time delay to the button, so that when pressed, the toy plays for, say, 15 seconds and turns off. The toy is intended for children with disabilities and sometimes ...
- 35
1
vote
0
answers
98
views
Convert capacitive sensor into physical button?
Is it possible to turn a capacitive button in to a protruding mechanical one?
I am thinking something round that sticks to a surface with a capacitive button on it and is essentially just a button ...
- 111
2
votes
3
answers
627
views
On / off push button flip-flop PCB?
I'm hoping someone could guide me in the right direction. I have an ongoing project that seemed simple: to utilize a push button. When you press it once, it toggles the LEDs on; when you press it ...
0
votes
2
answers
240
views
Emergency stop behavior - state of normally open switch when activated
I am using and emergency stop in an application. It is a push button with a twist release. I have the main circuit connected to the normally closed side and a detection circuit wired to the normally ...
- 1
0
votes
1
answer
77
views
Fixing SMD joystick button to PCB
I have ordered some of these small joystick buttons and I'm not sure if they will be properly fixed just with the 6 soldering points, as you do some latteral pressure to action them.
If I create a ...
- 728
0
votes
2
answers
169
views
Touch button bypass on fan with smart inching switch [closed]
How can I bypass the touch button on fan Sencor SFE 2340WH? I want to of/off fan with smart momentary switch. Below is componets maybe with reading errors.
Components:
TR1-TR5:
HSDQ / BT134-800 / ...
- 3
1
vote
3
answers
146
views
What is the cheapest way to connect a 12V input into a PIC?
I have a pushbutton which delivers 12V when is pushed. I want to connect it to a PIC12F1572 input pin. What is the proper way to do it?
My idea was to use voltage divider to reduce voltage under 5V ...
- 67
1
vote
1
answer
973
views
Tactile button switch footprint in KiCAD
I want to use this tactile switch in my PCB design:
https://datasheet.lcsc.com/lcsc/2002271735_XKB-Connectivity-TS-1101-C-W_C318938.pdf
As you can see in the document, the distance between the edges ...
- 1,399
0
votes
2
answers
226
views
"Active Low" Button Circuit Never Records High
I have an FPGA Starter Kit (Lattice MachXO3) which I'm using 25 IOs for push buttons inputs. I'm driving the starter kit and button circuitry from the wall with a 12V AC/DC adapter (rated for up to 2A ...
- 27
0
votes
1
answer
120
views
Multiple individually controlled lights and buttons widely separated [closed]
UPDATED:
I am building a sorting system using lights and buttons. The function is I have multiple items in a bucket I would like to sort to several different bins.
What I would like to have is up to ...
- 111
1
vote
2
answers
79
views
Raspberry Pi Pico controlling servo and timer
I would like to create a program that uses a Raspberry Pi Pico, this four-digit seven-segment display, SG90 micro servos, and one of these buttons.
My idea is that every time the button is depressed, ...
- 11
5
votes
2
answers
2k
views
What do dashed lines mean in the schematic?
This is a "6-pin self-locking push button", but I don't know what dashed lines mean (those that are in the schematic).
-1
votes
1
answer
228
views
How to determine the signal direction in Altium Schematic?
I have 5 signals as digital input. We can think of them as a simple button. They hook up to PCB via a connector on the card and I want to show them as a port in the Schematic. How can I determine ...
- 87
0
votes
1
answer
128
views
Circuit from NI DAQ 6001 to push button
I need to design a circuit with a NI DAQ 6001 and 3 push buttons. I don't know any design software, so I just drew by hand. I can give an explanation for you to understand.
Pins 1, 2, and 3 are ...
0
votes
2
answers
73
views
Need advice working with a button/switch
I'm using two 14.8 V Li-po batteries each to power frequency generators that are connected to piezo speakers.
I plan on adding XT60 connectors to the wires of the frequency generator so that the power ...
- 11
1
vote
1
answer
153
views
ATmega328P 4-button turn on, auto power off using transistor
I'm trying to create a basic 4-button battery powered remote. The logic behind it is that when one of the buttons is pushed it pulls the base of the PNP low thus turning on power to the circuit. The ...
2
votes
1
answer
404
views
Is reading multiple buttons presses with ATtiny analog input a reliable method?
I need to read the input from 8 different push buttons on an ATtiny microcontroller.
After researching how to do this with the least number of pins, I found out about using a voltage divider with ...
- 355
1
vote
1
answer
103
views
What would this breadboard look like as a schematic?
Here is my button pull-up resistor circuit on a breadboard. Note both the additional link between the button and ground, and the multimeter measurement point is different.
I was wondering what the ...
- 11
0
votes
1
answer
2k
views
Steam Deck: how to solder 3 pin bumper button with one missing (ripped-off) solder pad?
I don't have a lot of experience with soldering, but I can manage small repairs and I regularly watch TronicsFix's repairing videos (like this one for the same issue I have). Quite lucky, right?!
So ...
- 3
0
votes
2
answers
142
views
How to make long button press as a short press
I'm working with a MP3 player module: https://wiki.dfrobot.com/DFPlayer_Mini_SKU_DFR0299
The pin named "IO2" will do the following: at short button press it will start to play the mp3 file ...
- 29
0
votes
4
answers
107
views
Is it possible to get a tactile switch with more than two rails?
Making a button-based input device for my Raspberry Pi. When a pin is pulled to ground it registers a false, so: "if pin 1 = false output = 1".
The problem is I need 30 buttons and I only ...
0
votes
1
answer
107
views
Trigger button press after button hold released
I am currently planning a circuit around an Adafruit Sound FX. I want to use it in a costuming prop, but use the main button to trigger different sounds (without them being randomized). It should also ...
- 101
0
votes
2
answers
100
views
Identifying push button from a Bosch refrigerator
I have a Bosch refrigerator and some buttons have started to fail and I'm going crazy trying to find the push switch they used. I can't see any references and I have no idea what to look for. Any ...
- 29
0
votes
3
answers
562
views
Does this LED require a series resistor?
I have this momentary push button with built in LED. I cannot figure out whether it has a built in series resistor.
How can I check if it already has a series resistor without damaging it? If I use ...
- 1,505
1
vote
3
answers
214
views
How I choose switches' logic to interact with an MCU in my own PCB?
I want to add a tactile switch to interact with my MCU (using a GPIO) to add flexibility in using and debugging my PCB. My question is, is there any preference on adding the switch (N.O. type) in ...
1
vote
3
answers
116
views
Do momentary push buttons commonly deteriorate?
I have an Arduino project where a pin is kept high until a momentary button press connects the signal directly to ground, so the code is expecting the button to be ...
- 111
0
votes
1
answer
493
views
Push button is reducing voltage
I'm making a little flashlight that'll turn on and off with a push button, but the problem is that my push button changes 3.2 V into 2.8 V.
I don't know if it's a normal issue or how to fix it. Any ...
- 101
0
votes
1
answer
158
views
Reset push switch for LDO regulator
I have a XC6220B331MR-G 3.3 V LDO voltage regulator that supplies power to the MCU along with some other components on my board.
The regulator has an enable pin which I connected to VIN so that the ...
0
votes
3
answers
293
views
ESP32 DevKit not booting because of button
I developed a PCB for a project I'm working on. Today after assembling I tested everything and all relays where working as well as the ESP32 itself. Then I connected the sensors and it stopped booting....
- 377
0
votes
1
answer
308
views
Resistive finger PCB button
I want to do something similar to this question:
PCB "Touch" Button
However there the PCB was not described that much. I have a design where each 'finger' is 1mm apart.
And I'm not sure ...
- 135
5
votes
1
answer
743
views
Buttons that do not bounce or scopes that pretend to be 100 MHz but actually aren't?
I have bought single push buttons in India for 1 rupee a piece, that's a penny or so. They are seemingly very basic (you can see them around here other question). I might follow up here with more ...
- 1,551
1
vote
2
answers
359
views
Reading switches with no common ground on Raspberry Pi Pico
I have been trying to use a four-button PCB I had lying around in my house for one of my projects with a Raspberry Pi Pico. The problem is that I have never worked with such a layout that doesn't use ...
- 133
0
votes
1
answer
76
views
What kind of device am I looking for?
Our water heater comes with a simple push button switch that needs to be pressed momentarily to start its recirculation pump. The push button seems to effectively touch two wires of a Cat5 cable to ...
- 3
2
votes
1
answer
989
views
Button buzzer game circuit(s), how to use a 5V logic circuit to control a 24V LED circuit
I am attempting to put together a Jeopardy-style quiz game and have managed to build much of the software side of it by forking a few examples and stitching together some code.
I am working on the ...
- 21
0
votes
1
answer
1k
views
How to check if a 4-pin button is burnt out?
I was soldering a circuit with a 4-pin button in it and was trying to find a janky connection. I had the button output displayed via serial terminal (since the circuit used an Arduino) while I was ...
- 123
0
votes
1
answer
517
views
Relay open and close switch button automatically
I have a very simple circuit which consists of a battery, a load (lamp), and a button (on-off).
I want to a very simple and cheap (without Arduino or microcontroller) way to open and close the circuit ...
- 465
0
votes
2
answers
457
views
How do you disconnect a circuit briefly when a button is pressed?
I'm trying to add a reset button to my circuit which will temporarily cut the power to the circuit when a button is pressed.
I thought about using a transistor, and short-circuiting the gate to ground ...
- 2,123
1
vote
1
answer
416
views
How do I detect a button press between MCU loop function calls?
Currently, I have a few buttons connected via an I2C shift register, hooked up to an MCU. Super simple, so not sure if it needs a schematic, but I can share one (and any other details) if needed. I'm ...
- 2,123
-2
votes
2
answers
98
views
What is the purpose of the middle wire on the ribbon?
I am new to circuits and am trying to repair a device. What is the purpose of the middle button on the ribbon? It is the one that circles around 4 of the buttons on the device top. I am trying to ...
- 11
0
votes
1
answer
1k
views
Circuit to simulate pressing of a button
I need a circuit that, whenever there is a voltage change on a control pin (from 5v to 0v or vice versa), simulates the press of a button (aka closing a circuit for a brief period of time and then ...
- 101
1
vote
1
answer
282
views
STM32 Nucleo board, "crosstalk" between switch buttons
There are 3 switch buttons on a regular solderless breadboard each following this diagram:
Upon pressing any of the buttons, I am getting spurious breakpoint hits inside the ISRs for the other two as ...
- 1,061
1
vote
1
answer
99
views
How to distinguish which buttons have fixed on/off positions similar to a flashlight button?
I'm searching for a button/switch similar to one on a common flashlight: you click the button to turn the light on, then eventually click it again to turn off. Example clip of Button (Adafruit / ...
- 125