Hack-ENG-MotorSkin-Presentation

Technical details

It is easy to power up the board and motor from a 4 x 1.5V battery bloc.

• A 4 pin connector to insert a HC-SR04 ultrasonic sensor
• You can plug the HC-SR04 right on this connector or use extra wire to place the sensor on a top of a micro servo (so you can rotate the sensor in many direction).
• A Jack power supply connector (center positive) replicated on a screw terminal (10V max).
  It is user to power up the motors, the 5v regulator and the Pyboard.
• An additional schottky diode to power-up the Pyboard via USB (when the PyBoard is wired on USB) or throught the motor-skin (via the Jack or screw terminal power) when the USB connection is removed.
• Many decoupling capacities are used for the motors. DC motors generates lot of noise. To many noise/interference may distrub the PyBoard, si we have added namy filtering caps.
• In the complete kit: A 5V 500mA regulator, S7V7F5 Step-up/Step-Down.
  This DC-DC converter is able to produce 5V output from a input voltage over 5V -OR- under 5 Volts. This feature is very useful when working with battery pack. Such regulator can produce stable 5V to your 5V componants... included the ultrasonic sensor.
• 2 mini prower rails +5V & GND.
• 4 user button - ease the creation of user interface.
  Pressing the button short the pin to the ground.
• Duplicate the Reset button... stays accessible.
• In the complete kit: An HC-SR04 ultrasonic sensor used to evaluate distances and avoids obstacles.

Used pins

To ease the usage of Pyboard pins, we did anotate the motor-skin with PyBoard pin names.

The pins used by the motor-skin are surrounded with parenthesis.

PyBoard pin	Pin Mode	Usage	Details
X17	INPUT Internal PullUp	SW1	User button 1 (pin shorted to the ground when the pressing the button)
X18	INPUT Internal PullUp	SW2	User button 2 (pin shorted to the ground when the pressing the button)
X19	INPUT Internal PullUp	SW3	User button 3 (pin shorted to the ground when the pressing the button)
X20	INPUT Internal PullUp	SW4	User button 4 (pin shorted to the ground when the pressing the button)
Y5	OUTPUT	HC-SR04 Trigger	Trigger the ultrasonic sound to measure the distance
Y6	INPUT	HC-SR04 Echo	Activated when the ultrasonic echo is received by the sensor
X6	OUTPUT	Motor 1 control	First pin to control the H-Bridge of motor 1
X5	OUTPUT	Motor 1 control	Second pin to control the H-Bridge of motor 1
X3	OUTPUT PWM Timer 5, Channel 3	Motor 1 speed control	Enable pin of the motor 1 H-Bridge.
X7	OUTPUT	Motor 2 control	First pin to control the H-Bridge of motor 2
X8	OUTPUT	Motor 2 control	Second pin to control the H-Bridge of motor 2
X4	OUTPUT PWM Timer 5, Channel 4	Motor 1 speed control	Enable pin of the motor 2 H-Bridge.

Prise de contrôle à distance

X9 & X10 are free of use, however we do recommend to reserve the X9 & X10 pin for serial/UART usage.

With X9 & X10 you can wire a "Serial Bluetooth" breakout to control your robot with a wireless connexion.

PyBoard Pin	Pin Mode	Usage	Detail
X9	TX	---	Transmission pin of serial port UART(1)
X10	RX	---	Réception pin of serial port UART(1)

You can use one of the following options to take wireless control over your pyboard:

Bluetooth & REPL

FRENCH - use a Bluetooth Serial module with the PyBoard. Duplicate REPL via Bluetooth.

Cliquez ici

 

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Créé par Meurisse D. pour MCHobby.be - Created by Meurisse D. for MCHobby.be

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