LEDs Question

Hello to everyone.I have 4 leds connected in breadboard with 150 Ohms and the HC-05 bluetooth module connected in Arduino Uno.The power supply is 9V battery(power jack of Arduino). My question is if the 9V is enough to power both (HC-05 and LEDs).Thanks in advance

Connection of HC-05

GND(HC-05)-->GND(Arduino)
VCC(HC-05)-->5V(Arduino)
TX(HC-05)-->RX(Arduino)
RX(HC-05)-->TX(Arduino)

My connection is similar to this
https://www.google.gr/search?q=leds+arduino+uno+breadboard&espv=2&biw=1680&bih=949&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjQhtTd3IvKAhXDCiwKHRdrAhIQ_AUIBigB#tbm=isch&q=leds+arduino+uno+&imgrc=-qvjLfHMxessoM%3A

Possibly not, and even if it does, it will soon be flat!

PP3 9V batteries are pretty useless for anything but smoke alarms.

Does the circuit need to be battery powered? If not, a 7.5V or 9V wall-wart adaptor should work.

A 5V USB-type phone charger wall-wart would probably also work, but you would need an adaptor for the Uno's type-B socket.

Paul

PaulRB:
PP3 9V batteries are pretty useless for anything but smoke alarms.

Not quite true.

Their original purpose was to power teeny-tiny personal portable radios, and they last a modest time - a few days or so, depending on consistency of use and volume setting.

jack1992:
My connection is similar to this
https://www.google.gr/search?q=leds+arduino+uno+breadboard&espv=2&biw=1680&bih=949&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjQhtTd3IvKAhXDCiwKHRdrAhIQ_AUIBigB#tbm=isch&q=leds+arduino+uno+&imgrc=-qvjLfHMxessoM%3A

There's a hint there!

Near the front of that link it says "google" followed by "search".

You have cited a Google search for Arduino breadboards. All that appears is a lot of pictures of different things connected to Arduino UNOs. Your connection cannot be "similar to" them in any useful fashion. Telling us only that you use a UNO and a breadboard tells us nothing useful. :astonished: