37 lines
1 KiB
Markdown
37 lines
1 KiB
Markdown
---
|
|
id: nsrv
|
|
title: Push buttons
|
|
tags: [electronics]
|
|
created: Tuesday, June 25, 2024
|
|
---
|
|
|
|
# Push buttons
|
|
|
|
Push buttons are push-to-make switches. This means that they are **on when they
|
|
pressed and off when they are not pressed**. A classic example would be the
|
|
switches on a keyboard.
|
|
|
|
Push buttons have four legs that are connected in signal-in and signal-out
|
|
pairs.
|
|
|
|
To create a breakable circuit we would connect a signal-in cable to the top left
|
|
at row 23 and a signal-out cable to the bottom-right at row 25.
|
|
|
|
|
|
|
|
_The correct use of a push button where the button breaks the circuit_
|
|
|
|
|
|
|
|
To override the switch functionality and just have the button work as a
|
|
connector we would connect the signal-in to the row 23 input and the row 23
|
|
output.
|
|
|
|
_The push button being used as simple connector which does not break the
|
|
circuit:_
|
|
|
|
|
|
|
|
## Related notes
|
|
|
|
https://projects.raspberrypi.org/en/projects/button-switch-scratch-pi/1
|