Random playback device

sidetrack

Hello all,

This may seem basic to most but I am seaking a help in building a randomizer circuit much like the ones used in electronic toys that say various phrases. just something that would randomly supply a momentarily closed circuit to one of (say 5) radioshack 20sec voice recording modules. I am only starting to understand 555 timers. so if anyone happens to have a schematic or a suggestion as to a parallax product i might be able to use and a brief description I would really appreciate it. Thank You any and all in advance.

Phil Pilgrim (PhiPi)

This is something that a BASIC Stamp I (BS1) could easily handle with a fairly simple program. But they are out of stock right now. Oddly enough, the Propeller QuickStart, which is gross overkill for such a task, costs the same as the BS1. So you get a solution to your problem and a chance to learn and program a really cool chip.

-Phil

JonnyMac

You could pick up a Propeller activity board and play WAV files. No worry about storage, and much higher quality (stereo even) audio. Instead of five possibilities, you can have as many as you like. And virtually no wiring needed -- just connect a button to the board and a set of computer speakers to the audio output jack.

phatallica

Hi sidetrack ~ welcome to the forum.

Hmm ... are you specifically looking to trigger random audio? If so, then this may not require a whole bunch of circuitry. Tenda TDB380 is a module that can randomly play back files that are stored on an SD card.

Datasheet (look at section 4.2.2) - http://www.flajzar.cz/data/files/739-MP3-DATA.pdf

These are $10 at MDFLY. They are able to be used in many different ways, but the "Direct Play Mode" only requires a power supply and one switch to output a random MP3 file. The audio output can then be connected to, say, a pair of computer speakers.

I am not completely sure if this is what you are looking to accomplish, though, so please do let me know if I am off on a tangent.