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Mitch Altman Chief Scientist, Cornfield Electronics, San Francisco, CA USA Author of The Brain Machine in MAKE Magazine #10 Inventor of TV-B-Gone universal remote control
email: [email protected] site: www.CornfieldElectronics.com
Codebits November 14, 2008
Hacking Cool things With
Microcontrollers!
I Love My Job!
Why make cool things with Microcontrollers?
And anyone can learn…
Microcontrollers are fun to play with
Why make cool things with Microcontrollers?
Examples of Cool Microcontroller Projects (in my opinion)
TV-B-Gone TV-B-Gone Pro
TV-B-Gone Kit
Examples of Cool Microcontroller Projects (in my opinion)
MiniPOV3 kit
The Brain Machine
Trippy RGB Light LED Cube
Solar BugBot
Examples of Cool Microcontroller Projects (in my opinion)
Mignonnette Game kit
Examples of Cool Microcontroller Projects (in my opinion)
Trippy RGB Waves kit
What is a Microcontroller?
What is a Microcontroller?
A complete computer on a chip (with a little extra stuff)
Processor Program Memory
RAM
Input/Output
Timers
Inputs
Outputs
What Does a Microcontroller Do?
Like all computers:
Fetch Instruction
Execute Instruction
Repeat forever (till power goes off)
How to Make Cool Things with Microcontrollers
• Idea
• Hardware
• Firmware
• Coolness!
Hello World
Make an LED blink
Hello World – Hardware Battery +
Battery -
Battery - Resistor LED Microcontroller
Hello World – Digression:
(Very) Basic Electronics Lesson
Electronics: electrons flowing through wires and parts (sorta like water flowing through pipes)
Current -- speed of electrons flowing
Battery -- like a pump pushing electrons
Resistor -- like a kink in a pipe, slows down electrons
Diode -- one-way valve for current
LED -- special diode: emit photons when current flows
Transistor -- remotely controlled switch
Microcontroller -- zillions of transistors!
Hello World – Firmware
Software: X = 00000001
Firmware: X = 00000001
Assign a value to a variable:
Hello World – Firmware
PortA = 00000001
PortA = 00000000
Changing an output pin:
Hello World – Firmware
PortA = 00000001
Call Delay
PortA = 00000000
Changing an output pin (using manual delay):
Delay: Count = 0
Wait: Count = Count + 1 If Count < 10,000 goto wait Return
-----------
Hello World – Firmware
Main: Call Init
PortA = 00000001 Call Delay
PortA = 00000000 Sleep
Changing an output pin (using hardware timer):
Delay: Timer0 = 60,000
Wait: If Timer0flag = 0 goto wait Return
-----------
Hello World – Firmware
Main: Call Init
PortA = 00000001 Call Delay
PortA = 00000000 Sleep
Changing an output pin (using interrupts):
Delay: Timer0 = 60,000
Wait: If TimeFlag = 0 goto wait Return
-----------
Advanced topic:
ISR: TimeFlag=1
Return
Hello World – programming your chip
Use software on your computer Text Editor Compiler Programmer
Specific software Depends on your microcontroller PIC, AVR, etc.
Need hardware programmer (often very cheap)
Real Project: Ladyada’s MiniPOV3
Just like “Hello World”, but 8 LEDs and different timing
Etc…
Hacking! :
The easy way to make your cool microcontroller projects
Hacking!
TV-B-Gone from MiniPOV3 kit
Hacking!
TV-B-Gone Kit from MiniPOV3 hack
Hacking!
TV-B-Gone Pro from TV-B-Gone Kit
Hacking!
Trippy RGB Light from MiniPOV3 kit
Pulse Width
Modulation (PWM)
. . . . . . 1/2 brightness
. . . . . . 1/4 brightness
. . . . . . min brightness
Hacking!
Trippy RGB Waves kit from Trippy RGB Light
IR detector causes interrupt when it sees IR reflecting from your hand
Hacking!
Solar BugBot from MiniPOV3 kit
Hacking!
LED Cube from MiniPOV3 kit
(First NYC Resistor Project)
Hacking!
Brain Machine from MiniPOV3 kit
Synchronizes your brain to a desired brainwave sequence (and hallucinate along the way!)
WARNING: Blinking lights are not good for people with epilepsy
Brain Machine
What’s It Like?
Video by Bre P
ettis
Microcontrollers are fun to play with
Come by the Workshop Hardware Hacking Area
And anyone can learn!
Q & A
Mitch Altman Chief Scientist, Cornfield Electronics, San Francisco, CA USA Author of The Brain Machine in MAKE Magazine #10 Inventor of TV-B-Gone universal remote control
email: [email protected] site: www.CornfieldElectronics.com
Codebits November 14, 2008
Hacking Cool things With
Microcontrollers!
