New, Update2: Added a voice and sound module to make Henry talk.
This is my second robot so I wanted to build one with a track drive. I
got some nice tracks from robotshop.ca. and they're really nice. The frame is
made with Sintra board.... easy to cut and drill. Making the frame took the
longest time, the electronics was easier. Just need to program the LCD module
and add the head servos....to be continued.
So I gave Henry a new head and eyes....used a pan and tilt with 2 servos, and two green Leds for the eyes. The head was made with a toy binocular. Got these at a Dollar store….ya for a dollar.
It was easy to remove the front lens cut the Styrofoam and make a hole for the green leds. Mounted
this to pan and tilt with two blinking leds and Henry’s head comes to life.
On the front a LCD displays messages and a bargraph of the Battery voltage level. There is also a super bright blue Led which lights up when he detects an obstacle so he can have a closer look. A piezo on the front to make some warning beeps.
On the back I put 3 hinges which open to access the electronics inside.
Right now the only sounds are beeps but I will add a voice module to give him more personality.
Can Henry speak? Found a neat voice module from 4D Systems.
The SOMO-14D is a tiny Audio-Sound module that
can play back pre-stored audio files such as voice
and music from a micro-SD memory card. The
module supports 4-bit ADPCM audio files with
sample rates from 6Khz up to 32Khz. By using the
freely available software tool, any WAVE(.wav) or
MP3(.mp3) file can be easily converted to the
ADPCM(.ad4) format which can then be can be
saved to a micro-SD memory card. The compact
14pin drop-in-module takes up very minimal
board space and is ideal for any application that
requires embedded audio.
The module offers two modes of operation,
SERIAL-MODE and the KEY-MODE.
The SERIAL-MODE provides a simple 2-wire
interface to any micro-controller via its DATA and
CLK lines. Audio operations such as PLAY, PAUSE,
STOP and VOLUME control functions are all
available to the host micro via simple serial
The KEY-MODE provides a stand alone operation
where a host micro is not required. With only 3
push buttons, a 3V battery and a speaker, an
extremely compact and low component count
MP3-Player like system can be implemented.
In short, the SOMO offers a very flexible, compact
and low cost embedded audio solution for many applications
With the module installed I used Audacity (http://audacity.sourceforge.net/), a free audio editor program to record, edit and save the sound files. Next the sound files were converted and put on
a micro-sd flash card to be played. The card fits in easily into the Somo module.
The speaker (taken out of an old computer) is installed under the top frame, then drilled
some holes for the sound.
Henry can now make funny sounds and say clever things depending how he feels.
So far he says “My name is Henry”,”tada”, laugh1,laugh2,computer beeps,”oh-oh”,”whoa”.