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Results tagged with current
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user 10794
Use this tag to refer to the volume of electricity traveling through any given wire at any given time. It is measured in amps.
3
votes
The importance of I/O pin DC current
As for the current, as others have replied, you aren't supposed to be powering things, like motors, from the output pins. 20 mA is a nice amount of current to flash an LED, or send data to another device …
- 38.7k
1
vote
Deviation of power consumption between datasheet and real world?
According to the datasheet:
All current consumption measurements are performed with all I/O pins configured as inputs and with internal pull-ups enabled.
That was the critical point. … Those pull-ups are important, to stop the input drivers consuming current. …
- 38.7k
3
votes
Arduino potentiometer example: what limits the current?
That is, the input has a high resistance, and only consumes enough current to "sample" the voltage. …
- 38.7k
1
vote
Is there any way to control current precisely with Arduino without using a DC-DC converter?
It doesn't "control current" on its own. It has outputs which can either be off or on. Off is 0V and on is 5V (assuming you are powering it from a 5V supply). … The continuous current you can drawn from output pins is 20 mA. …
- 38.7k
0
votes
simultaneously read 16 hall sensor and maximum current allowed by Arduino
As Gerben mentioned in a comment, you could set up a matrix of the sensors.
Since the 3144 effectively is a switch to ground (when the magnet comes close it pulls the data line low) you would wire th …
- 38.7k
6
votes
Accepted
Circuit doesn't work when multimeter/current meter is attached
See this PDF: uCurrent - A professional precision current ... - EEVblog. … Also see Dave Jones' video: µCurrent
Meters measure current by dropping voltage over an internal resistor, and measuring the drop. …
- 38.7k
1
vote
Accepted
How much maximum current do the Arduino Wemos D1 (R1 & R2) consume?
Put an ammeter (multimeter in current mode) in series with the power supply and measure it, when configured in the way you intend to use it. …
- 38.7k
3
votes
Understanding flow of current with pull-up and pull-down circuits
Voltage doesn't "go through" a resistor, current does.
With the switch open, effectively a tiny amount of current goes through the resistor to pin 8. … To work out the exact amount, we can look at the datasheet which says that the maximum leakage current through an I/O pin at 5V is 1 µA. …
- 38.7k
0
votes
Accepted
how much current does Arduino Nano draw when only using 8 digital pins?
I would guess around 50 mA, to power the processor and the USB converter. I notice that this question suggests more like 20 mA.
To be certain, you could measure it, but probably 20 to 50 mA would be …
- 38.7k
3
votes
5
votes
Accepted
WS2812 - First are white and then they turn red/yellow/orange near the end
See Powering NeoPixels.
Each individual NeoPixel draws up to 60 milliamps at maximum brightness white (red + green + blue).
...
To estimate power supply needs, multiply the number of pi …
- 38.7k
2
votes
Accepted
Circuit works on breadboard but has power problems on protoboard
I have a page about power saving.
To summarize some of the techniques you can use:
Run the processor at a lower frequency
Run the processor at a lower voltage
Turn off unneeded internal modules in …
- 38.7k
2
votes
How to calculate voltage?
You have two problems here:
How to take 24 readings on an Arduino with only 6 analog inputs.
How to get the voltage in the range of 0 to 5 volts.
To take 24 readings you can use an analog multiple …
- 38.7k
3
votes
Accepted
"tamper" circuit of a reed switch: can I connect the two wires to an INPUT and an OUTPUT pin?
So I would like to have the current flowing ONLY during the "checking-timeframe".
Turn off the pull-up until just before checking. …
- 38.7k
5
votes
Accepted
Attiny85 appears to be drawing 0.2mA current but battery running down more quickly
Having said that, 200 µA current sounds like a lot. You should be able to get it down to 6 µA. Perhaps post your schematic? … After a bit of experimenting I got the current draw down to the (expected) lower level of 4.25µA running at 3V, and 6.77µA running at 5V.
You had not in fact turned the ADC off. …
- 38.7k