Questions tagged [debounce]

When a mechanical switch closes it's contacts typically do not close "cleanly" and tend to bounce or chatter. This rapidly switching signal could be misread in certain situations so it is usual to attempt to reduce this bouncing to ensure a clean switch detection. the danger is that if the switch is not de-bounced you can detect multiple events from one opening or closing. Can be accomplished using analog circuits or digital circuits.

Filter by
Sorted by
Tagged with
32
votes
7answers
21k views

Debouncing buttons

I recently read an article about button debouncing and was wondering if I should keep this in mind when working with, for example, an Arduino (ATMega mC)? I assume it is an issue, especially when ...
2
votes
4answers
837 views

A question about a debouncing circuit

I was reading a tutorial on debouncing the outputs of a rotary-encoder which are read by a micro-controller. Below is the circuit given: The writer of the tutorial claims the following: "In the ...
5
votes
4answers
3k views

Which diode to use on my RC switch debounce circuit?

I am choosing parts to build an analog RC switch debounce circuit. I plan to implement the circuit described here: http://www.ganssle.com/debouncing-pt2.htm (see "An RC Debouncer"). RC debouncer ...
0
votes
3answers
443 views

Should I consider debouncing my push button?

Considering a +5V battery source, I have a set of input switches. These switches are push buttons which stay closed upon clicking and open upon clicking again. One side of a switch is connected to ...
-1
votes
1answer
1k views

Debouncing of a push button in assembly using Timer1 interrupt - PIC16F628A [closed]

I am new at assembly programming and I need to develop a debouncing code to use on a push button, for that I am required to use timer1 interrupt. The push button will be used to increment a counter ...
6
votes
1answer
2k views

How is this Pushbutton Debounce code?

I am monitoring a pushbutton with a microcontroller where I am trying to take care of four things together: 50-msec debounce upon push-begin and 25-msec debounce upon push-release identify a short-...
4
votes
3answers
3k views

Is this a good way to debounce a switch?

There are plenty of debouncing circuits on the internet, but I couldn't really find one that fitted my needs / available parts, so I came up with my own, from what I had. There's nothing special about ...
2
votes
3answers
2k views

Switch Debounce Topology for Rotary Encoder [duplicate]

I'm looking to debounce the output of a rotary encoder I'm using as a switch to ground with a pull-up. Looking online I saw the debouncing circuit in Figure 2 and read about it here. However, I also ...
0
votes
1answer
1k views

State switches in FSM

I have a simple board with 6 buttons, consisting of 3 columns and 2 rows I would like to detect the pressed button. My code below works with this fsm: ...
4
votes
1answer
1k views

Choosing transistor for a raspberry pi switch

I'm trying to design a circuit that will control the power to a raspberry pi with a button. The basic usage is: first button press-> rasp powers up. second button press-> rasp continues with power ...
0
votes
2answers
241 views

Non-TTL debouncing

This is probably simple, but I'm not an ee. A closet with 4 doors, each has a normally-closed pushbutton connected to 5V source on one end and (to the same) 5V relay which controls the 220V (AC) of ...
0
votes
3answers
84 views

Really occasional malfunction of the Schmitt-trigger input

I'm using some Schmitt-trigger inputs for debouncing the interrupt problems. Referring to above circuit, the circuit has a RC circuit and the output of the RC circuit goes to the Schmitt-trigger IC(...
0
votes
0answers
515 views

Debouncing and hysteresis questions about a Schmitt trigger circuit

Above is a switching sensor which outputs ON OFF pulses by the 33k pull-down resistor. V2 and R_SW models the switching. The sensor output is needed to be measured between 1Hz upto 150Hz. I'm planning ...