Current Part:
PIC 18F452
PICkit 2
7805 +5v Regulator
10kΩ Resistor
47uF Capacitor
20 MHz Crystal
Breadboard
Jumper Wire
SIPS
4x 0-80 Nuts and 3/4" Bolts
1/4" Acrylic Plastic or 1/4" MDF
Power Drill
Parts List Details
The parts list for this tutorial is very short, and that should be welcome because it means less time spent assembling electronics and more time building!
Pico Servo || Sub-Micro Servo
While any type of servo is suited for this project, the best in my opinion would be one of the smaller sized servos. Torque is not a problem we will encounter, we just need an actuator that can move to and hold position. I would opt for the Sub-Micro Servos just because they're typically lower cost.
PIC 18F452
To test out the eyebrows with a demo program, we will use the PIC controller with some pre-programmed movements in software. Alternatively you could buy a radio system if you wanted to have dynamic remote control of the servos.
20 MHz Crystal
20 MHz is chosen as the clock speed for no specific reason. Any clock speed in the MHz range would work just fine, but you need to make sure you alter the timing in the firmware to reflect your different clock speed.
7805 +5v Regulator
This is the system's power supply regulator. Everything should be running at +5v, even the servos. Typically servos should run straight from the battery, but in this case they are low power and there will be no difference if we connect them to the regulated supply or the batteries.
Jumper Wire & Breadboard
All of the electronics will be done on a simple tried and true breadboard. Luckily there aren't many connections to be made so the electrical side of this project should be a breeze.