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5V-3.3V Sensors Confusion
MCP3008 alternativeHow to read Analog 5V sensor ouput with Digital 3.3V GPIO?Analog input with MCP3008Low-latency SPI for MCP 3008How to communicate between Pi 3 and an Arduino using UART from GPIO?Handling sensor data and reacting on ms timescalesConnecting PN532 NFC module to Raspberry PiErrors in distance measurements with the LV-MaxSonar EZ serieReading data from MCP3551 via SPIPowering a sensor using an external power supply board
Most of the sensors available in the market requires 3.3V-5V. The GPIO of the Raspberry Pi is 3.3V max only and not 5V tolerant. I have seen tutorials around the internet that they supply the sensors from 5V from the Raspberry Pi then connecting sensor's output pin to GPIO. Is that proper way to do it? I thought it will break the GPIO of the Pi.
Just to clarify, some of the sensors I've seen are DHT11, LM35, MQX Gas sensors etc (analog sensors are connected to ADC and that ADC is supplied using 5V from the Pi). Also for using I2C, UART and SPI I have seen they connect the supply from 5V of the Pi. Is that okay?
i2c sensor spi uart analog-to-digital
asked 12 hours ago
LinkedRomLinkedRom
153
add a comment |
Most of the sensors available in the market requires 3.3V-5V. The GPIO of the Raspberry Pi is 3.3V max only and not 5V tolerant. I have seen tutorials around the internet that they supply the sensors from 5V from the Raspberry Pi then connecting sensor's output pin to GPIO. Is that proper way to do it? I thought it will break the GPIO of the Pi.
Just to clarify, some of the sensors I've seen are DHT11, LM35, MQX Gas sensors etc (analog sensors are connected to ADC and that ADC is supplied using 5V from the Pi). Also for using I2C, UART and SPI I have seen they connect the supply from 5V of the Pi. Is that okay?
i2c sensor spi uart analog-to-digital
asked 12 hours ago
LinkedRomLinkedRom
153
add a comment |
Most of the sensors available in the market requires 3.3V-5V. The GPIO of the Raspberry Pi is 3.3V max only and not 5V tolerant. I have seen tutorials around the internet that they supply the sensors from 5V from the Raspberry Pi then connecting sensor's output pin to GPIO. Is that proper way to do it? I thought it will break the GPIO of the Pi.
Just to clarify, some of the sensors I've seen are DHT11, LM35, MQX Gas sensors etc (analog sensors are connected to ADC and that ADC is supplied using 5V from the Pi). Also for using I2C, UART and SPI I have seen they connect the supply from 5V of the Pi. Is that okay?
i2c sensor spi uart analog-to-digital
asked 12 hours ago
LinkedRomLinkedRom
153
Most of the sensors available in the market requires 3.3V-5V. The GPIO of the Raspberry Pi is 3.3V max only and not 5V tolerant. I have seen tutorials around the internet that they supply the sensors from 5V from the Raspberry Pi then connecting sensor's output pin to GPIO. Is that proper way to do it? I thought it will break the GPIO of the Pi.
Just to clarify, some of the sensors I've seen are DHT11, LM35, MQX Gas sensors etc (analog sensors are connected to ADC and that ADC is supplied using 5V from the Pi). Also for using I2C, UART and SPI I have seen they connect the supply from 5V of the Pi. Is that okay?
i2c sensor spi uart analog-to-digital
i2c sensor spi uart analog-to-digital
asked 12 hours ago
LinkedRomLinkedRom
153
asked 12 hours ago
LinkedRomLinkedRom
153
asked 12 hours ago
LinkedRomLinkedRom
153
asked 12 hours ago
LinkedRomLinkedRom
153
asked 12 hours ago
LinkedRomLinkedRom
153
153
add a comment |
add a comment |
1 Answer
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There is only one thing to bear in mind. Only feed between 0 and 3.3V to a Pi GPIO. Anything outside that range will eventually damage the GPIO and then the Pi.
You have to consider each device you wish to connect on a case by case basis.
Generally if a device is powered from 3V3 its outputs will be a Pi safe 3V3.
Generally if a device is powered from more than 3V3 (e.g. 5V) its outputs will be a not Pi safe more than 3V3 (e.g. 5V).
There are a variety of ways to drop an output pin voltage to a Pi safe 3V3. The simplest and probably the commonest is to use a voltage divider which just requires a pair of resistors.
You need to develop the skill of reading product data sheets and take particular note of their input voltage requirements and the voltage on their output pins.
answered 12 hours ago
joanjoan
49.9k34982
You need to differentiate between a 3V3 sensor chip with its 5V0 powered module/breakout, which usually has a step down regulator, converting 5V power 3V3 output for the chip. The input/output of the 3V3 chip is still 3V logic level, though. The 5V0 input is for the convenience of user who almost always has an USB connector as 5V power. The 3V3 MPU6050 gyro/accelero chip is an example. The 5V powered GY521 module contains the 3V3 MPU6050. You might like to read the GYU521 schematic to check out the confusing details: raspberrypi.org/forums/viewtopic.php?f=37&t=234304#p1440912
– tlfong01
10 hours ago
add a comment |
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1 Answer
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1 Answer
1
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oldest
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votes
There is only one thing to bear in mind. Only feed between 0 and 3.3V to a Pi GPIO. Anything outside that range will eventually damage the GPIO and then the Pi.
You have to consider each device you wish to connect on a case by case basis.
Generally if a device is powered from 3V3 its outputs will be a Pi safe 3V3.
Generally if a device is powered from more than 3V3 (e.g. 5V) its outputs will be a not Pi safe more than 3V3 (e.g. 5V).
There are a variety of ways to drop an output pin voltage to a Pi safe 3V3. The simplest and probably the commonest is to use a voltage divider which just requires a pair of resistors.
You need to develop the skill of reading product data sheets and take particular note of their input voltage requirements and the voltage on their output pins.
answered 12 hours ago
joanjoan
49.9k34982
You need to differentiate between a 3V3 sensor chip with its 5V0 powered module/breakout, which usually has a step down regulator, converting 5V power 3V3 output for the chip. The input/output of the 3V3 chip is still 3V logic level, though. The 5V0 input is for the convenience of user who almost always has an USB connector as 5V power. The 3V3 MPU6050 gyro/accelero chip is an example. The 5V powered GY521 module contains the 3V3 MPU6050. You might like to read the GYU521 schematic to check out the confusing details: raspberrypi.org/forums/viewtopic.php?f=37&t=234304#p1440912
– tlfong01
10 hours ago
add a comment |
There is only one thing to bear in mind. Only feed between 0 and 3.3V to a Pi GPIO. Anything outside that range will eventually damage the GPIO and then the Pi.
You have to consider each device you wish to connect on a case by case basis.
Generally if a device is powered from 3V3 its outputs will be a Pi safe 3V3.
Generally if a device is powered from more than 3V3 (e.g. 5V) its outputs will be a not Pi safe more than 3V3 (e.g. 5V).
There are a variety of ways to drop an output pin voltage to a Pi safe 3V3. The simplest and probably the commonest is to use a voltage divider which just requires a pair of resistors.
You need to develop the skill of reading product data sheets and take particular note of their input voltage requirements and the voltage on their output pins.
answered 12 hours ago
joanjoan
49.9k34982
You need to differentiate between a 3V3 sensor chip with its 5V0 powered module/breakout, which usually has a step down regulator, converting 5V power 3V3 output for the chip. The input/output of the 3V3 chip is still 3V logic level, though. The 5V0 input is for the convenience of user who almost always has an USB connector as 5V power. The 3V3 MPU6050 gyro/accelero chip is an example. The 5V powered GY521 module contains the 3V3 MPU6050. You might like to read the GYU521 schematic to check out the confusing details: raspberrypi.org/forums/viewtopic.php?f=37&t=234304#p1440912
– tlfong01
10 hours ago
add a comment |
There is only one thing to bear in mind. Only feed between 0 and 3.3V to a Pi GPIO. Anything outside that range will eventually damage the GPIO and then the Pi.
You have to consider each device you wish to connect on a case by case basis.
Generally if a device is powered from 3V3 its outputs will be a Pi safe 3V3.
Generally if a device is powered from more than 3V3 (e.g. 5V) its outputs will be a not Pi safe more than 3V3 (e.g. 5V).
There are a variety of ways to drop an output pin voltage to a Pi safe 3V3. The simplest and probably the commonest is to use a voltage divider which just requires a pair of resistors.
You need to develop the skill of reading product data sheets and take particular note of their input voltage requirements and the voltage on their output pins.
answered 12 hours ago
joanjoan
49.9k34982
There is only one thing to bear in mind. Only feed between 0 and 3.3V to a Pi GPIO. Anything outside that range will eventually damage the GPIO and then the Pi.
You have to consider each device you wish to connect on a case by case basis.
Generally if a device is powered from 3V3 its outputs will be a Pi safe 3V3.
Generally if a device is powered from more than 3V3 (e.g. 5V) its outputs will be a not Pi safe more than 3V3 (e.g. 5V).
There are a variety of ways to drop an output pin voltage to a Pi safe 3V3. The simplest and probably the commonest is to use a voltage divider which just requires a pair of resistors.
You need to develop the skill of reading product data sheets and take particular note of their input voltage requirements and the voltage on their output pins.
answered 12 hours ago
joanjoan
49.9k34982
answered 12 hours ago
joanjoan
49.9k34982
answered 12 hours ago
joanjoan
49.9k34982
answered 12 hours ago
joanjoan
49.9k34982
49.9k34982
You need to differentiate between a 3V3 sensor chip with its 5V0 powered module/breakout, which usually has a step down regulator, converting 5V power 3V3 output for the chip. The input/output of the 3V3 chip is still 3V logic level, though. The 5V0 input is for the convenience of user who almost always has an USB connector as 5V power. The 3V3 MPU6050 gyro/accelero chip is an example. The 5V powered GY521 module contains the 3V3 MPU6050. You might like to read the GYU521 schematic to check out the confusing details: raspberrypi.org/forums/viewtopic.php?f=37&t=234304#p1440912
– tlfong01
10 hours ago
add a comment |
You need to differentiate between a 3V3 sensor chip with its 5V0 powered module/breakout, which usually has a step down regulator, converting 5V power 3V3 output for the chip. The input/output of the 3V3 chip is still 3V logic level, though. The 5V0 input is for the convenience of user who almost always has an USB connector as 5V power. The 3V3 MPU6050 gyro/accelero chip is an example. The 5V powered GY521 module contains the 3V3 MPU6050. You might like to read the GYU521 schematic to check out the confusing details: raspberrypi.org/forums/viewtopic.php?f=37&t=234304#p1440912
– tlfong01
10 hours ago
You need to differentiate between a 3V3 sensor chip with its 5V0 powered module/breakout, which usually has a step down regulator, converting 5V power 3V3 output for the chip. The input/output of the 3V3 chip is still 3V logic level, though. The 5V0 input is for the convenience of user who almost always has an USB connector as 5V power. The 3V3 MPU6050 gyro/accelero chip is an example. The 5V powered GY521 module contains the 3V3 MPU6050. You might like to read the GYU521 schematic to check out the confusing details: raspberrypi.org/forums/viewtopic.php?f=37&t=234304#p1440912
– tlfong01
10 hours ago
You need to differentiate between a 3V3 sensor chip with its 5V0 powered module/breakout, which usually has a step down regulator, converting 5V power 3V3 output for the chip. The input/output of the 3V3 chip is still 3V logic level, though. The 5V0 input is for the convenience of user who almost always has an USB connector as 5V power. The 3V3 MPU6050 gyro/accelero chip is an example. The 5V powered GY521 module contains the 3V3 MPU6050. You might like to read the GYU521 schematic to check out the confusing details: raspberrypi.org/forums/viewtopic.php?f=37&t=234304#p1440912
– tlfong01
10 hours ago
add a comment |
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