New Micro Magician V2
October 11, 2012
The new improved Micro Magician V2 is here! It has all the features you loved in the original Micro Magician but with an ATmega328P and improved power supply. The new black and yellow PCB looks great and is easier to read.
You can now download the manual from here: https://docs.google.com/open?id=0B__O096vyVYqUjNXVV9RMmFuNkk
- Fully compatible with the Arduino IDE - board type: Arduino Pro or Arduino Pro Mini (3.3V, 8MHz) w/ ATmega328
- ATmega328P processor running at 8MHz, 3.3V with 32K FLASH, 1K EEPROM and 2K SRAM
- Input voltage from 3.6V to 9V
- Built in LDO +5V, 1A regulator (input voltage must be at least 5.5V) to power external 5V devices
- Built in LDO +3.3V, 500mA regulator
- Reverse polarity protection rated at 6A for protecting servos and motor driver IC
- Reverse polarity protection rated at 3A for logic and other 3.3V devices
- Built in USB using the CP2102 interface IC
- Built in dual FET "H" bridge with current limiting, motor stall detection and electronic braking
- Built in 3-axis accelerometer with 0G detection and selectable ±1.5G and ±6G ranges
- Built in 38KHz IR receiver providing 128 virtual buttons when using the Sony IR protocol
- 8x digital I/O pins terminated with 3 pin male header and selectable voltage for driving servos
- 3 pin male headers on analog inputs to provide 3.3V power for sensors
- 4 pin female communications header for 3.3V wireless transceivers (Xbee or Bluetooth)
- ISP socket for bypassing the bootloader and programming the processor directly
- Power, Rx, Tx, D13 and IR signal indication LEDs
- Software library provides functions for IR decoding, angle / impact detection, DC motor and stepper motor control
- Manual includes detailed information for library use and interfacing 5V devices
If you don't need the dual "H" bridge then you can put the motor driver into sleep mode and reuse D5, D6, D7 and D8 which have both male and female headers for easy interfacing.
The only pins not accessable are A0-A2 wich are dedicated to the accelerometer and D4 which is dedicated to the IR receiver.
Rocket Brand Studios sell several robot kits designed to take this controller and has designed an Xbee shield for wireless uploads.
NOTE: 9V is the absolute maximum input voltage. Rechageable batteries can have an initial voltage higher than normal when freshly recharged. For example a 7.4V Lithium Ion battery will be 8.4V when fully charged.
The first video is of a QuadBot chassis being driven by the Micro Magician V2. It is powered by a single 3.7V, 900mAH Li-Ion battery the size of an AA battery.
The second video shows a robot arm I made for my son from K'nex parts and the Chinese copy LOZ. The main drive motors have just had the built in switch removed and are connected directly to the Micro Magician motor outputs.
The arm motors have all had circuits from dead servos installed to make them into continuous rotation servos. These just plug directly into the servo connectors on the Micro Magician.
The whole robot is powered by 4x AA NiMh batteries and controlled with a TV remote. Because I did not mount the controller in a good position to receive IR signals I used an external IR receiver on an Analog input and told the microM library to use that receiver instead of the built in receiver. It would also be possible to read the two receivers independantly.