Contents
Can a RPI GPIO control a 5V relay?
Almost half of those Low level triggered relay work for Arduino, but NOT work for Rpi (See Appendix B for get around). And avoid using 12V powered relays, because newbies always connect the wrong wires to Rpi GPIO. Appendix A – [Expensive/Industrial grade] Rpi Compatible 3V/5V Relays (US$15 ~ US$30)
Can a 3.3V GPIO be used to control a opto?
I’ve read a Reddit post that was saying that as long as you use a separate 5v power suppy for the relay board, 3.3v should be enough to trigger the relays. Is that accurate, or do I need to use a transistor or something to provide the relay board inputs with 5v?
Can you use 5 V relay with Raspberry Pi?
You can’t use 5 V relay with signal from Raspberry Pi while Raspberry Pi signal is 3.3 V. So if you used Logic level converter to convert 3.3 V from Raspberry to 5 V then to relay in I think it may solve this issue. I don’t know why most distributors say it should work with raspberry pi while the ideal one for Raspberry Pi is 3.3 V relay.
Where are the resistors on a Raspberry Pi relay switch?
If you set 5V instead of 3.3V to VCC, you should definitely put one resistor each (~ 1kΩ) between the GPIOs and the IN pins. On the other side are at each relay 3 connections (see picture below): Depending on whether the IN pin is a LOW (0V) or HIGH (3.3V or 5V) is applied either the switch between the centre and right, or Open centre and left.
Can a Raspberry Pi be used as a relay?
For this purpose, relays can be used on the Raspberry Pi: The relay “switch” is utilized by means of a low-voltage pulse. Since the Pi only tolerates a maximum of 5V (the GPIOs even only 3.3V) without relays, there is the risk that the Pi could burn out. However, if you have two separate circuits this can not happen.
Where does the GPIO go on a Raspberry Pi?
Left (GND) comes to pin 6 of the Pi (GND), the right pin (VCC) comes to 3V3 (pin 1) of the Pis. Depending on how many of the relays you want to control, you need to connect a corresponding number of GPIOs to the IN pins.
What kind of power supply does Raspberry Pi use?
The relay module has an external 12V power supply, which I connected. And I have connected all the GPIOs that I wanted to use from the Raspberry Pi to the relay board. In addition, I connected the 5V and 3.3V connections to the 2 5V pins on the relay module (I used the 3.3 because the other 5V is being used to power the touchscreen display).