linux-works
DIY: arduino s/pdif samplerate LED display
a fully home-made arduino. an ancient 168 version part, at that.
it runs a software frequency counter program and displays the nearest standard spdif 'data rate' on a colored led. for this build, I chose 6 led's in 3 colors. from a distance, you can easily see which of the 3 colors it is, and you can also see which side of the display it is. that's enough to know which item is displayed, even with lower eye vision.
some standard rates that you could assign to leds: 32k, 44.1k, 48k, 64k, 88.2k, 96k, 128k, 176.4k, 192k. there are 6 leds on this board but there are more arduino digital pins still available. I chose 6 for visual simplicity and I can pick the 6 most common spdif sample rates and have those be the ones that the leds will show.
this board is meant to be mounted in an existing stereo system. only small round holes (your choice how many you want to use) are needed. you can then add sample-rate display to your DAC, switch, cd/dvd/bd player, satellite receiver or anything that uses spdif digital audio.
for solder-side, see:
www.flickr.com/photos/linux-works/6931855049/
for the frequency counter arduino code, see:
interface.khm.de/index.php/lab/experiments/arduino-freque...
I will upload my own code for this complete solution, shortly.
(crude video to show the leds coming on during valid spdif frequencies: www.netstuff.org/spdif/spdif_led_meter_1.mp4 )
DIY: arduino s/pdif samplerate LED display
a fully home-made arduino. an ancient 168 version part, at that.
it runs a software frequency counter program and displays the nearest standard spdif 'data rate' on a colored led. for this build, I chose 6 led's in 3 colors. from a distance, you can easily see which of the 3 colors it is, and you can also see which side of the display it is. that's enough to know which item is displayed, even with lower eye vision.
some standard rates that you could assign to leds: 32k, 44.1k, 48k, 64k, 88.2k, 96k, 128k, 176.4k, 192k. there are 6 leds on this board but there are more arduino digital pins still available. I chose 6 for visual simplicity and I can pick the 6 most common spdif sample rates and have those be the ones that the leds will show.
this board is meant to be mounted in an existing stereo system. only small round holes (your choice how many you want to use) are needed. you can then add sample-rate display to your DAC, switch, cd/dvd/bd player, satellite receiver or anything that uses spdif digital audio.
for solder-side, see:
www.flickr.com/photos/linux-works/6931855049/
for the frequency counter arduino code, see:
interface.khm.de/index.php/lab/experiments/arduino-freque...
I will upload my own code for this complete solution, shortly.
(crude video to show the leds coming on during valid spdif frequencies: www.netstuff.org/spdif/spdif_led_meter_1.mp4 )