with it. Will I need an additional power supply for doing so? I couldnt find any information of the current draw of the vibration motor and am worried that it is above the 20mA that the Arduino can safely provide.
"I measured a current draw of up to 58 mA for this motor; the 47R resistor on the PCB limits it to ~100 mA at most. The 58 mA might kill an Arduino (GPIO pins are specified for up to 40 mA), so I suggest adding a transistor in a future revision of this Twig in order to power the motor from VCC..."
I'd suggest arduino drives the gate of a low Rds, logic level N-channel MOSFET between motor - pin and Gnd, such as
First of all, thank you so much for your helpful reply! The seeedstudio comment was posted 3 years ago, and the wiki on the grove vibrator states that the revised version in 2013 "v1.2 add a transistor, use bigger current to drive Vibration Motor" . So a transistor seems to be included now, unfortunately they dont say anything more about it... I suppose I should try and contact them directly. I am trying to keep this all as simple as possible (It is a uni project and to order things I always have to jump through several loops and it takes ages..) that is why I am so much against ordering another piece for the setup.