Analogy

Posted on July 30, 2011

Voltage — km/hour
Amperage — kg/hour

RPM from voltage, torque from amps

Boarduino pins PWM and analog and digital

Posted on July 29, 2011

/*
 * Digital pins (0-13) are accessed using digitalRead(), digitalWrite(), and analogWrite().
 * The analog pins (A0-A5) are accessed only using analogRead().
 *
 * DigitalRead/DigitalWrite applies to 0-19 (20 I/O lines), PinMode is explicitly required for these calls.
 * AnalogRead applies to 0-5 (Which would be digital 14-19), no PinMode call required.
 * AnalogWrite applies to 3,5,6,9,10,11, (same mapping as the digital pins.) no PinMode call required.
 * Using analogWrite on any of the other digital pins will digitalWrite a 1 if >127 or a 0 if <= 127, and
 * the PinMode is still done for you.
 */

Idea #1: Robot control

Posted on July 25, 2011

Use mouse for robot control:
left/right => forward/backward
wheel => turn CW/CCW

Robot parts

Posted on July 24, 2011

I’m building a 4×4 robot. I’ve never done any electronic/mechanic projects before, so I’ll learn and make mistakes along the way.

Here are some of the major parts (minus sensors) that I plan to use.

Boarduino Specification:

• Designed to plug into a breadboard for easy prototyping
• Petite size, only 3″ x 0.8″ (75mm x 20mm)
• All ‘standard’ pins are brought out – Digital 0 thru 13, Analog 0 thru 5, ARef, 5V, Ground, Vin and Reset
• 2 LEDs, green power and red “pin 13″ LED just like the Arduino Diecimila
• Standard Reset button
• ATmega328P, running at 16.00 MHz, just like the latest Arduino, the Duemilanove (note that the product photo above hasn’t been updated)
• 6-pin standard ICSP header
• Standard 2.1mm DC jack (just like the original Arduino) with 5V regulator to run on 7V-17V power (DC)
• USB or External power, selectable with a jumper (just like original Arduino)
• 1N4001 diode protects against using incorrect wall adapter
• 6-pin header at the end for a USB-TTL cable
• Auto-reset capability when used with a USB-TTL cable
• Available as a low cost kit with standard parts, so its never out of stock
• All through-hole parts are easy to solder

Motor Specification:

• Horse Power Cont.: 5W
• Voltage/current: 12V DC
• RPM: 300
• Reversibility : Reversible
• Length of Motor (including spindle): 76.1mm
• Diameter of Motor (D): 37mm
• Length of Motor Body(excluding spindle) (BL): 56.4mm
• Full Length of Spindle (SL1): 19.7mm
• Length of Spindle (SL2): 14.6mm
• Length of Spindle Flat (SL3): 13.5mm
• Diameter of Spindle (SD): 6.0mm
• Height of Spindle (no a flat ) (SH): 5.4mm
• Weight: 186G

Wheels Specification:

• Plastics Wheel Rim
• Diameter: 60 mm
• Width: 50 mm
• Hexagonal joints: 12 mm
• Rubber Tires
• Diameter: 130 mm
• Width: 57 mm

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