Hi,
You may get noise if you don't place bypass capacitors on the 1117 as per the data sheet.
Mount the capacitors as close as possible to the 1117 leads.
Can you post your complete PCB thanks.
Tom... 
Hi,
You may get noise if you don't place bypass capacitors on the 1117 as per the data sheet.
Mount the capacitors as close as possible to the 1117 leads.
Can you post your complete PCB thanks.
Tom...