> For the complete documentation index, see [llms.txt](https://wiki.linhkientot.vn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.linhkientot.vn/micro-bit-products/micro-bit-starter-kit-v1/pushbutton-with-micro-bit.md).

# Pushbutton with micro:bit

Before we put together the circuit, let's take a closer look at the Pushbutton Module. There are three pins here:

S : This is the signal pin which we will connect to a GPIO pin on the micro:bit

3.3V : Though it is unlabelled on the module, this middle pin will need to be connected to 3.3V on the micro:bit

GND: In electronics, we define a point in a circuit to be a kind of zero volts or 0V reference point, on which to base all other voltage measurements. This point is called  ground or GND.