In general, it is possible to connect USB devices into various mobile devices with the right adapters: Many android and iOS devices can make use of OTG adapters
(android) or the Apple USB camera connection kit (iPhones and iPads), to attach standard USB devices into the Micro USB, USB-C, and Lightning ports on those various devices.
It doesn't work for everything, in every instance, with every device, but many things do indeed work.
Brian Gullikson, CBRE 98.5 KTIS-FM | Faith 900 KTIS
Life 97.3 KDNW | Faith 90.5 KDNI
Chief Engineer 3003 Snelling Ave. North
KTIS, KDNW, KDNI St. Paul, MN 55113
Phone: (651) 631-5094
From: Dave Land <firstname.lastname@example.org>
Sent: Monday, April 02, 2018 12:07 PM
To: CRTech <email@example.com>
Subject: Re: [CRTech] FM receiver modules?
Isn't it USB only? How many cell phones have a USB port?
On Mon, Apr 2, 2018 at 12:01 PM, Bill Hurne <firstname.lastname@example.org> wrote:
This dongle and many others displays signal strength when connected to a cell phone running free apps.
From: Bill Hurne [mailto:email@example.com]
Sent: Monday, April 02, 2018 9:50 AM
Subject: RE: [CRTech] FM receiver modules?
Not very basic, but this displays signal strength in dBuV. Very nice for relative comparisons. Also
measures much else such as modulation, RDS sub level, pilot level, decodes RDS, etc.
From: Willie Barnett [mailto:firstname.lastname@example.org]
Sent: Monday, April 02, 2018 9:40 AM
Subject: [CRTech] FM receiver modules?
Are you aware of any inexpensive, very basic, analog FM receiver modules? The goal is to come up with a simple "relative" field strength measuring device for fairly strong FM radio signals.
I've tinkered with a 2-transistor design with a single tank circuit front-end, that "kinda works", but I'd like something more selective, and a bit more sensitive.
Meanwhile, a-Googling I will go. ;)