Bob The Skull

What should go here is an explanation of what this project is and why it exists. Instead, I'll say this: Alexa should be dumber and more annoying.

Tests

Cause I know I'll need 'em.

uln2801a (Darlington Pair IC)

All outputs need a 220 Ohm resistor as each Raspberry Pi GPIO can source 15mA @ 3.3V.

Name	Use	mA
Left Eye
Right Eye
Brain Light	Thinking Indicator	Implement with PWM so a pulsing/fading effect can be used
Panel LED 1
Panel LED 2
Panel LED 3
Panel LED 4
Mouth	Blah blah blah	330mA @ 3.3V = 10 Ohm
Lighting

Name	GPIO Pin	Use	mA	Notes
Button
Photoresistor		presence / movement detection	Can use to “smartly” add “oh hey there” / “hello” type messages

Alpine Linux + a Go application to control the hardware. Various Go packages to interact with AVS (Alexa Voice Service).

Custom animation library for various responses.

DSP software to match mouth movements to audio output (very simplistic).

Wake Word Engine - Might be able to reuse the demo program from Amazon. It's C++ garbage.
AVS system - Basically the bridge between the hardware and AVS
Gesture / Animation Library - pre-defined routines for animating Bob
- The DSP / Speaking mechanism should probably go here

Speaking
- Mouth movement tied to audio
- Medium brightness brain and eyes
Thinking
- Pulsing Brain
- Front LEDs randomly blink on and off one at a time
- Eyes lit
Listening / At Attention
- Brain Lit
- Eyes Lit
Cheeky Emote
- Mouth Hangs open
- Winks one eye
Deeply Confused
- Mouth stays mostly open (gaping gesture)
- Eyes wink randomly
- Brain blinks rapidly
- Blink red/orange front panel LED