November 4th, 2008

Voice pad with LM3S811

Voice pad with LM3S811

What is a voice pad you might ask, well the answer is simple, just think of notepad, yes this is a voice recorder. This way you don’t need to carry paper and pen around to get your ideas, to-do’s noted, just record it and play it back.

The gadget described was made by the author for the 2006 Stellaris contest, it uses the LM3S811 microcontroller by Stellaris, SD card for storing the messages, and earpiece for the audio output, OLED display, it even has a buzzer to play ring tones, all hardware used is part of the Stellaris development board.

The messages are played back via the earphone piece, which is powered by PWM, so the audio output stage is a D class amplifier, the volume is controlled by a potentiometer.

The author states that the device can store up to 100 10-30s messages, I say that is plenty of room for personal use, and with the OLED display and menu it is a handy device.

The microcontroller used in this project can be hard to find, but the available source code makes it possible to port the application to another device.

Voice pad with LM3S811:[PDF][Download]

 Elevator Voice Message Level Indicator

Have you ever been into a boring elevator ? with no sound and level indicator lights ? because I’ve been and i can tell you its not a pleasant environment to be in. Those elevators are sometime rebuild or renewed but the level indicator lights and some kind of sound system are not installed because of the high price tag, and possible need of rewiring. This project comes with a solution, and an easy to implement one.

It features a voice message system which inform you about the current level and optional about the next level. It needs no connection to the elevators system, its powered by batteries so you just need to stick it somewhere inside the elevator. If i would to build this system i would also include an FM radio, because most modern elevators include this features and i think its neat.

Elevator Voice Message Level Indicator: [Download Project][View Project PDF]

© 2007-2011 YourITronics | Any logo, trademark and project represented here are property of their respective owners | Wordpress | Privacy Policy    RSS