Linked Questions

0
votes
2answers
307 views

What happens if I put 3.9V into the GPIO Pin? [duplicate]

I have a sensor which gives an output of 3.9V when high and 0V when low. Perfect for the RPi, except is it? What happens if I put the 3.9V high signal directly into the GPIO and if bad things will ...
0
votes
0answers
26 views

Can GPIO pin of Raspberry pi tolerate voltage above 3.3V? [duplicate]

I am using an inductive proximity sensor having an operating voltage of 5V with raspberry pi 3B+. Sensor has been given 5V from Pi. On sensing metal, output of this sensor is approximately 4.5-5Volts. ...
4
votes
1answer
852 views

RS232 to Raspberry Pi Zero W

I know this may be a dumb question but can you connect a RS232 Tx, Rx, and Ground from a device directly to the Rx, Tx and Ground on a Raspberry Pi Zero without having to get a Max3232 or something ...
4
votes
1answer
3k views

How to connect Raspberry Pi and Arduino with SPI?

I'd like to connect my Raspberry Pi and my Arduino Uno with SPI. I saw a solution here, but sy wrote at the end that this is wrong, because Raspberry Pi transmitting/recieving 3,3V on the pins and ...
-1
votes
3answers
761 views

running a mosfet from 3.3V gpio output

i am running a low side switch with the 3.3V gpio output of the pi, and for the particular transistor i’m using (irf520 ) the 3.3V is barely enough to turn it on - is there some clever positive ...
1
vote
1answer
360 views

Connecting digital output device directly to pi's gpio

I recently purchased four of these SW-420 based vibration sensor modules, and am following along with this question: Python code for SW-420 vibration sensor. I am brand new to circuitry and want to ...
1
vote
2answers
151 views

Which of those listed logic level MOSFET to choose for driving a heater

I'm planning to control 3 LEDs and a heating element (5 Ohms) using a Raspberry Pi. The main power supply outputs 12V & 5A. Using an L78S05CV Voltage regulator, I'm planning to power the RPi. So ...
0
votes
1answer
88 views

GPIO only reaches 2,4v when high

TLDR; Under little load the GPIO 22 reaches 3,5v whereas under more load it only reaches ~2,4V, which is not enough to trigger the reset-line on an ATMEGA328P. UART GPIO Pins still reach 3,3V in both ...
1
vote
2answers
103 views

RPi 1 Model A input/output pin ratings

RPi 1 Model A here. Brand new to RPi and electronics in general. I'm finding a hard time finding the exact voltage/current "ratings" for my model but the closest I could find was a comment under this ...
1
vote
1answer
160 views

same GPIO input signal on multiple raspberri's from one source

Im having 7 raspberri pi's 3 connected to 7 screens, running an python 2.7 app to download different images from google drive, every raspberry has different images. Geeqie is displaying those images ...