![]() ![]() * Button 1-10 starts playing the music in the correspondent file. * Usage of the player: The SD Card must contain 10 Directories with music files. For more infos search for "arduino button analog resitor" * which uses one of the analog ports and 1/4W 3,3K do divide the voltage * Software for the ABox - a Hoerbert inspired music player for children. If it’s switched on, it starts playing with the last file. If the AdaBox is switched off, it stores the actual played file on the sd card. The concept of operation is easy: 10 Buttons represent a folder/playlist on the SD card, Button 11 jumps back, Button 12 jumps forward. As you can see in the Images, I added two input resistors which helped to get better measurement values. A circuit plan can be found here or by searching for “arduino button keyboard resistor”. With this technique its possible to measure the voltage on one of the arduinos analog ports and to decide which button was pressed. The 12 button panel works with 12 resistors which are bridged if a button is pressed. I combined it with adafruits mp3 shield and a self welded button panel. Like most of my small diy projects i decided to use an arduino as base for the player. this means each file must be converted before uploading it to the players SD card. To have a good sound with a mono device, the music must be compressed to one channel. easy upload of songs with any format without the need of conversionįor using standard audiofiles I needed to build a stereo musicplayer anyway.run with an rechargeable pack instead of batteries.Inspired by the hoerbert I decided to build my own version called ABox because I want to have some changes: The price is not cheap but really fair, as I know after building my version of a child capable music player. Then I found the famous hoerbert which is hand made in Germany, with responsible ingredients and really suitable for a child. While thinking about the lifetime of these plastic players in a 2 years old child hand, I decided to look for alternatives. ![]() The first idea was to buy one of these “pinky” plastic things made in east asia. If three or four of us wanted to collaborate on an experiment, that would probably be worth a named branch, which we'd probably share between ourselves but not push to the central repo.A while ago I wanted to buy a musicplayer for my daugther. That ensures that these important branches and tags look the same to everyone.Īgain, I've no idea whether this is how one's supposed to use mercurial, but it seems to be a model that works well for our size of team. Our released major versions all have their own named branches off from the main line, and minor versions have tags on those branches. I myself almost never make non-local tags or named branches (except by accident, and I destroy them if I do). They make interesting past states easier to find. I use local tags to mark revisions I might like to come back to one day. If I feel my memory slipping about a twig that's been around for a bit, I bookmark it. But several people are a bit scared of it and prefer if I send them diffs that they can apply with patch.įor experiments I expect to be short lived and private, I just let lightweight branches happen where they may, and remember what's going on. I'll occasionally push some changesets to a co-worker if they're one of the people who's comfy with how mercurial works. ![]() Occasionally once an experiment has worked out I'll modify the main line and push a changeset into the central repository, from which it will find its way to everyone else's machine. I make many experiments and lightweight branches in my own private repository, which never get pushed to our main central repository. I'm working on a single shared repository with about 20 other people. How I actually use these things in practice. If anyone knows better than me then feel free to edit this answer so it's correct. After about twelve months of using mercurial daily I haven't really got to grips with its model(s). They tend to be local to your repository, and won't propagate unless you propagate them deliberately.Īt least I think that's how they all work. So they're not represented as part of the repository history. They're metadata rather than being mixed in with the versioned objects. Local tags and bookmarks are much more like what git calls tags and branches. They'll tend to propagate to other repositories in ways which are not necessarily obvious. Named branches and tags are mercurial-only concepts where the branch names and tags actually get recorded in the repository by making more commits to the repository. The other four are ways of annotating lightweight branches and the changesets that make them up. Your repository history forks and sometimes merges as you change things and move around your history. Lightweight branches are what happens if you just use mercurial. There are actually five concepts to play with: ![]()
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