Everyone 
's the RPI Pico!
What are some random uses for a RPI Pico?
-Power Supply (The pico has a buck-boost DCDC converter outputting 3.3V @ 1A)
-USB Serial Adapter (use the https://github.com/raspberrypi/picoprobe firmware for a USB-Uart Converter, no more FTDI breakout boards!)
-Logic analyzer https://github.com/pico-coder/sigrok-pico
-Oscilloscope https://github.com/fhdm-dev/scoppy
-Microphone
Jan's USBTMC DAQ
What's your favorite random use for a Pico
Its a start (totally random use for a pico...)
Hopping between two feedback divider values.
Its too bad the PLLs don't have fractional feedback dividers
There is still a lot of register combinations to arrive at many different discrete output frequencies.
I'll keep tinkering away...
I'm using it in as a device for our secretary to call us ( me and my colleagues - we are in another room). Since we are most of the time with the headphones on, we miss to ear the phone ringing. 
Be careful, once she finds out they're inexpensive she is bound to just open the door and throw around Pico boards until she gets your attention. 
I forgot to add that each one of us has a Pico with a LED that start's to blink when she presses our name on the screen ! It's just funny
Oh, she does swear under her breath... when we don't answer the phone... It's all fun and games until she goes into the room !
