My ardunio only has 1 5 volt output and 1 3.3 volts. I want to power an lcd screen which require 5 volts. I aslo want to power an Ir receiver which also requires 5 volts so how do i power theses things with an external power source?
Just because there is only one pin, it doesn't mean only one device can be powered.
It depends on the amount of current the devices draw, not the number.
Here are the two items http://www.ebay.com/itm/190562012579?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649#ht_3961wt_1398
Cant find the data sheet for that
here is the data sheet for the ir
The number of devices you connect to the 5V rail depends on your soldering abilities. I recently connect 2 servos to the 5V rail on an XBee shield from Sparkfun. I soldered a wire to the 5V pin, and then soldered 2 more wires to that for the servos. (And then a another 2 for some thermsistors)
You should be fine. The Arduino +5V pin can put out up to about 200 mA. Your LCD display with the backlight should take no more than 100 mA with the light on. Your IR will just take a few mA.
The Arduino +5V pin can put out up to about 200 mA.
No that is a misunderstanding. The ATmega's +5V pin, that is the processor chip in the Arduino, should not be made to draw more than 200mA. That is the sum of all the current the output pins are sourcing plus a bit for the chip itself.
The 5V line on the arduino (board) can supply up to 500mA if powered from USB or just about 650mA if powered from an external supply through the power jack and built in regulator.
so it would be enough fore both of those items?
Dylan552:
so it would be enough fore both of those items?
Yes