Timeline for Multiple LEDs & HC-SR04

Current License: CC BY-SA 3.0

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when toggle format	what	by	license	comment
Jun 15, 2015 at 15:36	vote	accept	user2969
Jun 15, 2015 at 15:33	comment	added	user2969		Thanks Everyone! That answers my question. Sorry for all the confusions
Jun 15, 2015 at 14:37	comment	added	Edgar Bonet		140 mA × (9 V − 5 V) = 0.56 W. The regulator can dissipate up to 0.6 W with the minimum pad size. Then, assuming the Arduino complies with this required minimum, you should be (barely) fine.
Jun 15, 2015 at 13:51	comment	added	Anonymous Penguin		@user2969 If you hooked the power to VIN and GND, then that should be more than enough for the HC-SR04 and a handful of LEDs. On a side note, please ask another question if you have another question. Thanks!
Jun 15, 2015 at 13:04	comment	added	user2969		Edgar, would I have enough current to run those LEDs and a distance sensor from the 5 v pin if I had a 9v 1A charger?
Jun 15, 2015 at 7:59	comment	added	Edgar Bonet		If you power your Arduino through the Vin pin, the current limit will be given by the 5 V regulator. According to it's datasheet, it's actually a power dissipation limit: the higher the Vin voltage, the lower the current limit (power = current × (Vin − 5 V)). Check the thermal pad size on your Arduino and refer to Fig. 21 (p. 8) of the datasheet.
Jun 15, 2015 at 5:50	comment	added	user2969		Thanks for all your help and encouragement. The link arduino.cc/en/Main/ArduinoBoardUno says that there is a 5 v output straight from the board's voltage regulator. Is that not separate from the output pins?
Jun 15, 2015 at 3:38	history	edited	user2969	CC BY-SA 3.0	added 50 characters in body
Jun 15, 2015 at 3:29	answer	added	Kolban		timeline score: 0
Jun 15, 2015 at 3:12	review	First posts
Jun 15, 2015 at 15:38
Jun 15, 2015 at 3:11	history	asked	user2969	CC BY-SA 3.0