Surly Electrician Help Needed!!!

[Hairy Biped 586]

Hey guys, I'm going to be adding some cafe/globe string lights to my backyard and wanted some advice/help with some electrical wiring.  I have a plan in place for where and how I'm going to hang everything, but I need to get some power to the light strings.  My plan was to use an existing exterior outlet, and add a switch that leads to a new additional outlet that I plan to install on the underside of the underhang of my house.  My question is 1) can I use the power running from the existing exterior outlet ganged to the new one and 2) how do I wire it so that the original outlet remains hot and the new one is switched?  Basically I want to be able to keep my existing outlet and add another one that the lights will plug into, that is switchable so I can easy turn the lights on and off without plugging and unplugging extension cords.  Can anyone help me with this?

[Jim Ed Love 93]

Extension cord plugged into original outlet, wire that to switch, run from switch to new outlet. Viola, when you flip the switch power is supplied to new outlet.

I would use metal junction boxes and outdoor rated switch and outlets.

This would be the redneck way I'd do it.

[Chilly Water 417]

Instead of jerry rigging a switch and risking getting shocked, an electrical fire, or a short, it might be easier to just add a wireless remote control inverter kit. Plug an extension cord into it and run that to the lights. Only downside would be losing the remote

https://www.amazon.com/Woods-32555WD-Outdoor-Wireless-Weatherproof/dp/B001Q9EFUK/ref=pd_bxgy_60_img_2?_encoding=UTF8&pd_rd_i=B001Q9EFUK&pd_rd_r=3f2c1601-b258-11e8-b9b0-b9c4745829eb&pd_rd_w=20SJF&pd_rd_wg=KM4UN&pf_rd_i=desktop-dp-sims&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=6725dbd6-9917-451d-beba-16af7874e407&pf_rd_r=DZXSTBQ4ZAN6YWDVCNFM&pf_rd_s=desktop-dp-sims&pf_rd_t=40701&psc=1&refRID=DZXSTBQ4ZAN6YWDVCNFM&dpID=41svAnLlS9L&preST=_SY300_QL70_&dpSrc=detail

Edited September 7, 2018 by Chilly Water

[Gil Bang 26001]

I installed those string lights out on the patio.  I ran power through my attic to the eaves and installed a remote from Lowes.  It works like a charm.