Hi everyone, i have a small project to do for my exam (i am a noob with Arduino) .Im thinkin of three air quality sensors (MICS-6814, GROVE DUST SENSOR, ccs811 ) linked to Arduino MKR 1400. I see MKR GSM 1400 runs at 3.3V but the sensors at 5v, should i use a voltage level converter? how can link all the sensor without using the breadboard at the end? Is a PCB the only solution? Can Arduino MKR Connector Carrier help me (with the voltage too?) The Grove dust would have his own housing. Should i change the other two sensor in Grove ones? Can the MKR Proto Shield be useful for grouping all together and have more rooms for 5V and GND? Thanks for the attention
Of course. Always make sure the voltages are correct.
Just using wires is another solution. That was how things were done before the PCB was invented. Answering the question of why the PCB completely took over I leave for you to answer.
I don't know the sensors very well, it's really part of your engineering job to understand the sensors you're working with, and how to connect them. Using all of the Grove ecosystem may help connecting them together of course. Do read the manuals, especially when it comes to the voltage levels (both signal and supply).
Let's say i have to sensors with their GND how i connect both on the GND on the arduino? Can i connect non-Grove Sensor to MKR Connector Carrier?
Run a wire from each of them to the GND.
If that sensor is compatible with the MKR connector carrier: yes. Otherwise: no.
Look more carefully. Almost all sensors these days run on 3.3V, but include a 5V regulator so that they can be interfaced to older, 5V Arduinos, which at some point will become obsolete.
For example, the MICS-6814 sensor is 3.3V and can be directly connected to any 3.3V processor.
To connect 3.3V sensor I/O pins to 5V Arduino I/O pins, always use bidirectional logic level converters like this one. Sometimes those are included on the sensor PCB, but you must check, and add your own if the shifter is not present.
Sorry for my ignorance in electronics but isn't this https://www.amazon.it/iHaospace-MICS-6814-Detection-Monoxide-Nitrogen/dp/B07LD5TKR8 powered at 5V?
If i'm without breadboard and PCB how can i attach the two sensors GND into the one on ARDUINO, it has a single slot
Agreed, that particular module claims to operate at 5V only. The heaters on the chip run at 2.4, 2.2 and 1.7V.
Why not look for 3.3V sensor modules to go with your 3.3V Arduino? 3.3V sensors constitute at least 95% of the market.
Twist and solder the wires together.
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