PROJECTS

## The Idea…

To bring a old, broken valve-based antique radio into the digital age with the ability to stream audio from the internet, plugged in USB stick, or a networked computer. All while keeping the classic retro radio look.

## Time Statistics

Below are the time logs for this project:

The time spent (in hours) by date:

The time spent on the Columbus Radio project (as a percentage) by category:

## Material Cost Statistics

The individual material costs of each item used to build the Columbus Radio.

And now as a pretty pie chart (as a percentage of the total cost):

## Things To Improve On

1. The volume control dial is very sensitive, and the volume only changes a distinguishable amount over a small segment of the potentiometers full range of motion. I believe this a compounded problem due to the potentiometer itself being logarithmic, but the code treating it like a linear pot, and the volumio volume control being quite sensitive in the upper volume regions to start of with.
2. If you pull the radio’s power cord out from the wall (or turn it off at the wall), you have to go around the back and set up the head unit to the correct volume and sound source (aux). The head unit is designed to have the continuous power source from the battery when in a vehicle, a battery that the radio does not have. Turning the radio on/off by it’s front on/off switch does not cause this problem as I leave a residual power feed on that goes to the head unit. Unfortunately this means that the PSU and RaspberryPi also continuously run, which may shorten their life and definitely consumes more mains power than necessary!
3. Simultaneous playback. It would be really neat to have other devices around the house that can be set up to play the same song at the same time. I’m guessing this feature would be best built into the Volumio player that I am using.
4. The software does not turn itself off when the power switch of the radio is turned off (the power switch just turns of the amplifier). This is a good thing in terms of start-up speed, as music is pretty much instantly available as soon as you turn it back on. However, it does mean that volumio keeps streaming music from the internet, which can chew up bandwidth if you have a long playlist and/or set it into repeat mode. A better way would be for the power switch to also pause the music, and then start it again when it turns back on, starting off from where you left it.