provided by PICAXE, and load it to the chip.
The entire setup process for adjusting the
servo limits, trigger type, retrigger delay,
number of both the ambient and trigger audio
tracks, and adjusting the jaw servo are done by
following audio prompts that have you adjust a
potentiometer to the required positions and then
push a button to set them. The entire setup
process takes less than 15 minutes.
The audio tracks are stored on an SD card
with the ability to have up to four ambient tracks
and 10 trigger tracks.
We designed the board to be easy to set up
and to not require a computer once the original
program is installed on the chip.
This board is the culmination of several
years of learning and experimenting. The desire
to create a board to control a three-axis skull is
what started me on the path to learn how to
design and build my own custom printed circuit
Now with that experience under my belt,
I'm usually able to put together a board to meet
most of my prop building requirements.
Time to Add an Audio Track
To achieve the most realistic movement of the jaw in
relation to the audio, we use a free audio editing program
called Audacity to modify the tracks. We replace the audio
of the right channel with a tone track which is what
actually drives the jaw circuit. Using this method, the jaw
will only respond to the desired talking portions of the
audio clip and allows us to also have background music or
sound effects that the jaw ignores. The entire clip remains
on the left channel and goes to your speakers.
You can record your own voice with a custom track
and then adjust it to fit your needs through the program.
I suggest you use quality speakers that take full
advantage of the very good audio provided by the Tenda
boards. I mount mine in the chest of the figure as it makes
your character more believable and helps cover any servo
Now it is Your Turn!
This can be a challenging undertaking, but the rewards
are worth the effort. The confidence gained by completing
one of these projects will certainly encourage you to take
on more complex undertakings.
Nothing adds to the interest or believability of a
character more than for you to give it the gift of speech.
Adding the three-axis movements is the icing on the cake.
So, pick a design and start building! But be warned ...
once your characters start talking, you’ll want them all to
have the gift of gab! SV
ACTOBOTICS BUILD PARTS LIST
Quad hub mount C 545360 1
1.125 Standoffs 633132 1
6/32 Locknuts 632142 1
90° Quad hub mount B 545424 2
.500 Standoffs 633122 1
Swivel hinge 585644 1
Flat single bracket 585468 1
Attachment blocks 585403 1
9” Channel 585450 1
190° Hub mount A 585494 1
Linkages 585432 1
Center hole adapters 633118 1
Hub horn 525130 1
Aluminum beam 585416 1
1” Standoffs 633130 1
Servoblocks 637110 2
HS-485BB Servos 33485S 2
HS-645MG Servo 32645S 1
HS-225BB Servo 31225S 1
6/32 Threaded rod 98847A007 1
.3125 6/32 Screws 632108 1
.500 6/32 Screws 632114 1
.625 6/32 Screws 632118 1
Servo mount SVM275-115 1
Servo plate 575112 1
6/32 Screws from hardware store in 1.25” & 1.75” lengths
44 SERVO 08.2015