I am trying to power an Arduino nano connected to an LCD screen. I want it to work without connecting it to a computer. Please let me know if the connections aren't clear in the photos. I have a 5 V regulator and a 9 V battery, would that work? If Vm

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    What does If Vm mean? – Greenonline Aug 31 '18 at 7:53
  • connections are definitely not clear in the photos .... remove the photos and include a wiring diagram instead – jsotola Aug 31 '18 at 18:19

Just connect the 5 volt regulator to the Arduino, ground, 9 volts and that's all. As long as you are not pulling too much current through the regulator everything will be okay (too much current means about 0.75 A so you will have no problems with your LCD - the regulator will start to heat up). If you don't know how to connect your regulator than here: How to Connect a Voltage Regulator in a Circuit

I use it without any additional components and I have no problems.

  • A typical, "smoke-alarm" type 9v battery won't last very long, either. A 6.0 or 7.5v battery pack made up of 4 or 5 AA cells (respectively) in series will give much better service. – JRobert Aug 31 '18 at 15:59

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