User avatar
Posts: 211
Joined: Sat Mar 03, 2012 11:48 am
Location: Melton Mowbray, England

Alarm Clock Radio

Sat Mar 18, 2023 11:29 am

I would like to build an alarm clock radio using a Pi zero or 4. I thought there would be plenty of existing projects but cannot find anything which fits my needs.
Requirements -
Display readable from 4 metres or so
Play radio from national stations
Programmable to turn on or off
Connects to a pair of 3 ohm speakers
Low power consumption

Any recommendations for a suitable display and speaker driver

User avatar
Posts: 7326
Joined: Wed Aug 28, 2013 3:31 am

Re: Alarm Clock Radio

Sat Mar 18, 2023 12:15 pm

Turn spare TV into alarm clock?
Get a Pi to use HDMI-CEC to turn the TV and start playing stuff.
Use GUI Zero to make large digit display on the screen.
Speakers are build into the TV.

Lowest power will be by using a Pico.
VGA projector the display onto the wall, roof.

Just two ideas, may other ways to do it, including smartphone.
Can Smartphone do HDMI-CEC?
If you bring it close you do' need to see it at 4m.
I'm dancing on Rainbows.
Raspberries are not Apples or Oranges

User avatar
Posts: 423
Joined: Mon Mar 07, 2016 6:10 am

Re: Alarm Clock Radio

Sat Mar 18, 2023 2:53 pm

You can consider Peppy Player as a candidate for such project. Its timer functionality is exactly what you need:

You can use the Pi's on-board audio system if you don't care about high quality audio (which is usually the case for alarm clock radio). Just connect powered speaker(s) to the audio jack and you are done. If you need higher quality audio there are many DAC/Amplifier boards for Pi (e.g. boards from HiFiBerry, Pimoroni, Adafruit etc)

As for display, you can use SPI, HDMI or DSI display of any size. Another option - use it in a headless mode (without any display) - setup your timer using Web Browser running on your computer or cell phone.

Best regards

Return to “Media centres”