Is it possible to control the 5V supply (e.g. pin 4) via python?

Question

I want to (de)activate a fan, which is connected to the pins 4 and 6, depending on the temperature of the CPU.

Is it possible to (de)activate Pin 4 (or Pin 2) at the Raspberry Pi 4 via python? I have already read this article: How to turn power off on 5V dc gpio pin with python, but is there another way just via python, without using a transistor?

This question has been asked dozens of times. You could write a program, but there is no need. The kernel has inbuilt fan control https://raspberrypi.stackexchange.com/a/105820/8697 — Milliways, May 25 '20 at 00:51
Does this answer your question? How to turn power off on 5V dc gpio pin with python — Milliways, May 25 '20 at 03:32
I've already read this post, but I just wanted to assure myself. Thanks for the upper link! — Mike, May 25 '20 at 12:03

score 5 · Accepted Answer · answered May 24 '20 at 19:58

5

No.

Pin 6 is connected to the Pi's ground rail.

Pins 2 and 4 are connected to the Pi's 5V rail.

answered May 24 '20 at 19:58

joan

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So the real only possibility is to interrupt the power circuit? – Mike May 24 '20 at 20:02
@Meiki Yes, with a switch, e.g. manual switch, relay, transistor etc. – joan May 24 '20 at 20:13
But is it possible to control the transistor via python, e.g. via using a GPIO-pin? – Mike May 24 '20 at 20:16
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Yes. Plenty of answers showing how. – joan May 24 '20 at 20:19
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This other question in this forum provides more information. https://raspberrypi.stackexchange.com/questions/95710/how-to-program-active-cooling-connected-to-gpio – BalooRM May 24 '20 at 23:49

Is it possible to control the 5V supply (e.g. pin 4) via python?

1 Answers1