mc-Things

mc-Products => mc-Module => Topic started by: rvdvoort on February 20, 2017, 03:22:33 pm

Title: Max Sensor Power Consumption
Post by: rvdvoort on February 20, 2017, 03:22:33 pm
What is the max power I can draw from a Mcmodule 110 "high" digital pin when the sensor is connected to external battery of 3.3 - 3.5 V. The sensor I have in mind would pull a max 15mA when in use.

Thx,
Rvdvoort
Title: Re: Max Sensor Power Consumption
Post by: mc-Josh on February 21, 2017, 11:46:07 am
The maximum power that can be drawn from an I/O pin is 5mA for the mcMod110.
Title: Re: Max Sensor Power Consumption
Post by: rvdvoort on February 21, 2017, 03:49:42 pm
Thanks for the feeback but 5 ma is not enough. I might be able to go below 10 ma (around 8 ma)

Would it be possible to use 2 or 3 pins of the Mcmodule 110 in parallel to support the max of 10 ma. Would need this power only for a couple of seconds befor switching the sensor Off.
Title: Re: Max Sensor Power Consumption
Post by: mc-Josh on February 21, 2017, 04:31:57 pm
You may be able to use 3 pins in parallel, the maximum recommended draw for the microcontroller is 5mA per pin to a total of 15mA for the entire device.
Title: Re: Max Sensor Power Consumption
Post by: kristofferis on February 22, 2017, 09:04:07 am
Is it the same recommendation for mcModule 120?
Title: Re: Max Sensor Power Consumption
Post by: mc-Josh on February 22, 2017, 09:58:21 am
The mcModule120 uses a different microcontroller which current allows up to 4mA per pin but the microcontroller does have a high drive capability which allows up to 15mA per pin. We are looking at adding a new Pinmode in a future version which will allow the pin to be set to this higher drive mode. Is this something that you are immediately interested in?
Title: Re: Max Sensor Power Consumption
Post by: kristofferis on February 22, 2017, 02:34:56 pm
Thanks for the reply, this is not something that I immediately need but definitely a good feature and it is great that it will be added.