Hack-ENG-MotorSkin-Presentation
Technical details
Never use a voltage over 10V on the Jack connector/power terminals. The board is not protected against the accidental reverse polarity wiring. Check twice |
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:
FRENCH - use a Bluetooth Serial module with the PyBoard. Duplicate REPL via Bluetooth.
Créé par Meurisse D. pour MCHobby.be - Created by Meurisse D. for MCHobby.be
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