Analog/Digital IO pins

Question

Can all of the GPIO pins on the raspberry pi 3 be used as both analog and digital pins? Are there any dedicated analog or digital pins?

score 3 · Answer 1 · answered Aug 29 '16 at 05:33

3

There are no analog pins on the Pi.

answered Aug 29 '16 at 05:33

Steve Robillard

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score 3 · Accepted Answer · edited Dec 17 '18 at 19:02

Adding to Steve's answer. While all GPIO pins offer only digital input or output, PWM can be used (with very little external circuitry - a low-pass-filter) to at least output analog signals. The Pi has two dedicated hardware PWM pins and may further use the other GPIO pins for software PWM. Some of the interface libraries, such as pigpio or wiringPi, support this feature. This is also the way the Raspberry Pi outputs analog audio.

Learn more: Can I use the GPIO for pulse width modulation (PWM)?

Other than that analog input or output will require hardware add-ons such as HATs to do so.

Analog/Digital IO pins

2 Answers2