Halloween Animatronics,Animatronics for Beginners to advanced electronics automation and pneumatic controls


How to Build Your OWN Halloween Animatronics

from Halloween Animatronics VOLUME 1 - SERVO CONTROL

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Halloween Animatronics

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Halloween Animatronics

Let's Take a look at SERVOS and Control Circuits
selected information from Halloween Animatronics Volume 1 Servo Control circuits.

Now that you know a few of the basic 555 timer circuits to use in your halloween animatronics, I'm going to show you how to use them to build servo control circuits. We'll start with the basic servo control circuit. You can use this circuit in your animatronics to drive the servo from an adjustable starting point to the maximum - really a 2 position control. Next we'll learn how to automate this 2 postion control so that your servo will move all by it'self. 555 servo driver
halloween animatronic servo driver Your animatronics will take a giant leap forward when you have several of these automatic drivers working your prop And since we've already went over how to build these these timer circuits, we finally get a chance to use them. Now these are really cool. Taking your circuits even further with the automatic 3 postion servo driver. Im going to introduce a logic circuit - which will drive the servo to each of the three postions randomly. Great for natural non repeating movments to set your halloween animatronics apart from the crowd!
Finally we're going to make the prop simulate talking by using a really handy circuit which takes recorded voice and uses it to switch servo postions on the 2 postion servo control circuit Combining all these different circuits gives you the tools needed to fully automate and animate your animatronic props so Let's get started!
555 servo driver explained Your standard hobby servo needs 3 things to operate. Connection to Ground, Postive voltage and finally a control signal. The control signal is really a pulsed voltage, and we can use the Old Standby 555 astable circuit to create the control signal for the servo. All we do is modify the Resistor and Capacitor Values and Voila... a pulsed control signal from PIN 3, the output.
Heres the long and short of it - For each servo postion you will need a seperate Resistor values. So lets set up the first servo postion Ok - Im going to make a quick drawing of the 555 circuit we're going to use. Be sure to pick up a copy of Halloween Animatronics Volume 1 for detailed explainations!
  We've got the 555 chip in the middle, 4 and 8 are connected to postive voltage Pin 5 has a .01microfarad capacitor connected and then to ground Pin 1 goes directly to ground Pin2 and 6 are connected together and then help form help our capacitance part of our RC circuitry with the .1 microfarad capacitor
Now we get the the Resistor values. Pin seven will have a 220 kilo ohm resitor between itself and our postive supply voltage Now we also hook pin seven to a 4.7 kilo ohm resisitor and then the other side of the 4.7 hooks directly to the pin 2 and 6 connection.  
555 servo driver in action Ok all that's left is pin three - our output pin In order to drive the servo we feed this output to the base of a transistor This circuit will creat the 1 millisecond pulse needed to drive a servo to the start postion. A 1 ms pulse width will drive the servo Left and a 2 ms pulse width will drive the servo to the Right. So to get it in the middle you would need a 1.5 ms pulse width.
It's really easier than it may seem because the 555 does all the work for you. So in order to animate something we will need to be able to automatically switch back and forth between these two resistor setups. We could build 2 seperate resistor circuits and switch them by relay or by hand but an easier setup would be to incorporate the 4066 CMOS switch. 4066 CMOS switch servo circuit
555 servo driver explained by dave Now before we add it to our schematic, Let me show you how it works. THere are FOUR inputs Each INPUT acts kind of like a swtich and closes two contacts.. Taking a closer look. say I apply 5 volts to pin 13 here That's what we call LOGIC HIGH as opposed to LOGIC LOW or zero volts.
So this LOGIC HIGH on pin 13 is going to tell the switch to close contacts 1 to 2 and allow current to flow through those 2 outputs. Take away the LOGIC HIGH and switch opens up. SO you can see how using this chip adds a huge advantage to our circuit repitour servo driver circuit in 3d
halloween animatronics 555 servo driver Adding the 4066 to our schematic is easy You can always get a spec sheet of any of these chips off the internet if dont have one. Here's the entire servo driver circuit Remember - in order to make pins 11 and 10 close we need to apply a LOGIC HIGH to pin 12
So - How do we make this automate this servo driver? How get this circuit set up so we can animate something Easy - Just add another 555 timer circuit. In Halloween Animatronics Volume One, there is an entire section on building these servo driver circuits plus you get to download all the BONUS files and schematics so get your copy today! animatronics bonus bundle how does the 555 servo driver work
BONUS BUNDLE includes:
downloads include 58 page FULL Color PDF - schematics - visio drawings - PICBASIC codes and Bonus- Modding a Bucky PDF
We just set Resistors and capacitor to get the timing we want. The output of PIN 3 will connect to Our INPUT PIN on the 4066. - Now we got automation - I've built the first part of the servo driver circuit - But it's always a good idea to test your circuit as you go along.
These are the 2 wires I will connect to the 4066. touching them together simulates what the 4066 will do when a LOGIC HIGH voltage is applied to their input pin. Here's a closer look at the servodriver circuit. With a minimum of space and components - this circuit is a staple in my electrical Halloween animatronics.
servo driver circuit I used a 16 pin chip holder because I knew I wanted to mount 2 555's This servo header can accomodate up to 6 servos I have supplied part numbers for ordering lots of these components on the downloadable schematics Now that I have all the components in place Its time to make some adjustments I can adjust the amount of time between servo postion movements You can also adjust the postion of the servo arm.
Ok so this is an automated 2 postion servo controller. Let's see what it can do. I have it driving the PAN motion of this ANIMATRONIC NECK skeleton. Now I say skeleton because all it is right now is an aluminum skeleton which will serve as the Neck joint in one of my animatronic designs.
3 position animatronic servo driver As you can see, the circuit will drive any of the servos on this design. But Sometimes you need more than the 2 postion servo controller. Sometimes you need 3 - and sometimes you need a random element Randomness emulates life, and adds more realism to your prop motions. Lets take a look at what I call the 3 postion servo controller
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Here alone you will find a complete guide to making your own Halloween Animatronics. Since building animatronics requires you to be familiar with several technical areas, we are proud to introduce a NEW series specifically focused on Halloween Animatronics.
This 3 part technical series of DVD video's, downloadable videos and downloadable PDF documentations will allow you to begin with absoluetly no electronic knowledge and progress, step by step to creating your OWN working Halloween animatronics! And we're not talking about the cheap junk you find at the superstores, You will be creating Hollywood style animatronics... The type that will, without question, blow away your entire neighborhood!

3 Awesome DVD volumes
Volume 1 - beginning to intermediate knowledge levels
Volume 2 - Advanced animatronics (pneumatics/design and control)
Volume 3 - Halloween Scare Concepts and Designs

Click around the site and Start the Halloween Animatronics learning curve RIGHT NOW!


We have brought all these resources together for the expressed purpose of teaching you step-by-step, not only the mechanics of Halloween Animatronics, but the actual design and construction of the electronic control circuits that make it all happen!

copyright 2008, Dave Corr

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Build your own audio controlled servo - Instructions are on ScaryTerry.com