Hi,
I purchased the adafruit data logger shield for arduino.
Can someone tell me what the current use is for the shield? I have searched the documentation but I don't see it. I am using this shield in conjunction with a the 20X4 LCD screen, this pushbutton switch, 2 humidity sensors, 2 thermocouple breakouts. All powered from the 5V source on an Arduino Mega 2560. I just want to make sure I am not overloading the 5V source. My count so far is:
LCD logic = 200mA
LCD backlight = 180 mA
Humidity Sensors = 2.5 mA x 2
Thermocouple amplifiers = 5mA (I think) x 2
Pushbutton (LED) = 25 mA
4 push buttons that go digital input pins
Thanks in advance.
Data Logger Shield Specs
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- adafruit_support_mike
- Posts: 67454
- Joined: Thu Feb 11, 2010 2:51 pm
Re: Data Logger Shield Specs
It depends on how often the module updates its position with the satellites.
It draws about 25mA during the acquisition process, and 20mA when tracking the satellites after making a fix. It only draws that current while running its radio though, so the overall current load is usually somewhere in the 5-25mA range.
It draws about 25mA during the acquisition process, and 20mA when tracking the satellites after making a fix. It only draws that current while running its radio though, so the overall current load is usually somewhere in the 5-25mA range.
- GK22
- Posts: 19
- Joined: Tue Aug 26, 2014 9:07 pm
Re: Data Logger Shield Specs
Mike,
Thanks for the reply. The shield I'm using is just the data logger to SD with a RTC. It's not the one with the GPS. Do you have the specs for this one?
Thanks for the reply. The shield I'm using is just the data logger to SD with a RTC. It's not the one with the GPS. Do you have the specs for this one?
- adafruit_support_mike
- Posts: 67454
- Joined: Thu Feb 11, 2010 2:51 pm
Re: Data Logger Shield Specs
Oh, my mistake.. sorry.
The RTC uses almost nothing.. a few microamps. It will run for months from a watch battery.
The SD card uses 150mA-200mA when you read and write to it, but nothing the rest of the time. The overall load depends on how much/often you want to use it.
The RTC uses almost nothing.. a few microamps. It will run for months from a watch battery.
The SD card uses 150mA-200mA when you read and write to it, but nothing the rest of the time. The overall load depends on how much/often you want to use it.
Please be positive and constructive with your questions and comments.