MyoWare muscle 2.0 Sensor + Arduino Nano 33 IOT battery info

Sensors Biometrics
1

I have an Arduino Nano 33iot which can supply 3.3v to sensors.
I am planning to use 4 Myoware muscle sensor connected to my arduino.
Can nano 33iot feed all of the sensors or do i need external power

2

I’m not finding much good info on how much power the nano 33 iot can supply to peripherals, but it looks like 50mA max? It might require testing to be certain, but I’d recommend swapping to a different MCU, or external power

Most of our MCU boards can supply ~600mA

3

Do you think esp32 will give enough for 4 sensors?
if I use external power how should I do the connections?
VIN >> external battery +
GND >> external battery - and MCU GND
ENV >> analog pin?
and 3.7v lipo battery is enough?

1 Like
4

An esp32 should be fine, but if not I’d grab a power shield for each if need be

5

If I bought power shields and attached them to my muscle sensor can I still get readings from sensor?
should I connect only the ENV pin to my MCU?

6

Yep - see the ‘stacking shields’ section here Getting Started with the MyoWare® 2.0 Muscle Sensor Ecosystem - SparkFun Learn

7

Is the connection with MCU change since we are using a power shield?
Am I only connect ENV pin to MCU or should I connect anything else?

8

Click that link I sent and it will tell ya

11

I couldn’t find where it shows the connections with power shield to the Arduino
The connection photos on the website doesn’t mention about how to connect muscle sensor with power shield to a Arduino. It just mentions how to connect muscle sensor without power shield to a Arduino.
So I have concerns since the muscle sensor gets power from power shield do we need to connect it to 5v in Arduino?
Can you help please?