I recently purchased a small circuit board (the FN-BC10-PN) which can play up to ten custom sounds. Each sound is linked to an open circuit to which you can wire up a button. You can plug the thing into your computer as a USB device, upload the files, then disconnect the device and use it on its own as a little sound player. You can wire up power to it directly or use a USB power source, and you can wire up a small speaker or plug in a set of headphones for output. The thing even supports serial communication so that you can hard-wire it to a computer (think Arduino) and control it programmatically.
I’m keeping my plans for its use a secret at the moment (nothing nefarious, I assure you). If my idea works out, I’ll definitely make a post about it. Don’t expect anything too soon, though.
I came across a problem with the device, however, and I wanted to record the solution so that others who are experiencing the same issue might get their issue resolved.
The device worked fine at first, but it stopped playing sounds after plugging it into my computer and then removing it. I can’t recall if it stopped working after the first time I plugged it in, or if it took a couple of times. I used the Windows option to safely eject the device; maybe that caused the problem? Anyway, the basic problem is that the board stops working after you plug it into a computer — even if you don’t modify the contents of the board’s memory.
What normally happens when you use the device is that it flashes a tiny light on the board when it is playing a sound. After plugging the thing into Windows once and removing it, the device no longer played sounds, and the little light no longer flashed.
After emailing back and forth with someone from the website I bought the thing from, I was eventually provided with a solution which worked.
Normally you place the sound files in the root folder of the device’s memory: up to ten files named 001.mp3 to 010.mp3 (.wav files are also supported). The device comes with ten default mp3s in the root folder, so you don’t actually have to upload any files in order to test the board once you get it.
The solution to the problem I experienced was to create ten subfolders in the root directory numbered 01 through 10, and to then move the corresponding mp3 file into each directory (e.g. 001.mp3 into subfolder 01). That’s it.
If anyone out there is having problems with their FN-BC10 not working anymore after plugging it into a computer, this is how you solve the problem.
The guy I emailed said something about Windows putting a hidden file or something on the drive when you plug it in, and that this was the cause of the problem. I’m going to have to investigate what that’s all about.