K Andres / Mbed 2 deprecated SCIboard

SCIboard(TM): mbed base board data logger - Altimeter: MPL3115A2 - Accelerometer: LSM303DLHC - Gyro: L3G4200D - 4 High Current MOSFET switches

Dependencies:   mbed

/media/uploads/AstrodyneSystems/sciboard_top.jpg

/media/uploads/AstrodyneSystems/sciboard_bottom.jpg

Product Description

SCIboard will take your model rocketry, science, or engineering project to new heights with a complete 10-Degree-Of-Freedom (10-DOF) Inertial Measurement Unit (IMU), 4 high current MOSFET switches, PWM interface (RC servos), USB (memory sticks or BlueTooth) and interfaces for GPS and an XBee® RF module. The SCIboard is an mbed base board ideal for use in college and high school science labs, science fair projects, high power model rocketry, model airplanes, and near space balloon projects. SCIboard is also designed for Open Source software so you can customize the application. Example applications include high power model rocketry, near space balloon projects, and R/C airplanes/quadcopters. While SCIboard requires some basic electronics and software knowledge, it combines multiple breakout boards into a single base board which improves reliability, especially in high g environments such as in model rocketry. Available on Amazon. Search on "SCIboard".

  • Dimensions: 1.5 x 3.8 inches (3.8 x 9.7 cm)
  • Weight: 0.8 ounces (24 g)

10-DOF Inertial Measurement Unit

Going beyond just the 6 degrees of freedom afforded by a 3-axis accelerometer and 3-axis gyro, SCIboard includes an additional 3-axis magnetometer, and highly accurate altimeter / atmospheric pressure sensor. Sensors provide digital measurements over an I2C shared bus (p27 and p28).

Precision Altimeter

(Freescale Semiconductor – MPL3115A2) MEMS pressure sensor with 24-bit Analog-to-Digital Converter (ADC) employs temperature compensation resulting in fully compensated 20-bit pressure/altitude measurements (resolution down to 1 foot).

  • Pressure range: 50 – 110 kPa.
  • Pressure reading noise: 1.5 Pa RMS over -10 to +70° C. Conversion rate: up to 100 Hz.
  • 12-bit temperature sensor measurement range: -40 to +85° C.

3-Axis MEMS Accelerometer

(STMicroelectronics – LSM303DLHC) The sensor measures linear acceleration. Pointing any axis to the earth will apply 1 g in that axis when stationary.

  • Selectable full scale range: +/-2 g to +/-16 g.
  • Sensitivity: 1 – 12 mg/LSB depending on full scale range.
  • Zero-g level offset: +/-60 mg.
  • Acceleration noise density: 220 micro-g/sqrt(Hz).
  • Operating temp range: -40 to +85° C.
  • Conversion rate up to 400 Hz.

3-Axis Ultra-Stable MEMS Gyroscope

(STMicroelectronics – L3G4200D) A gyroscope is an angular rate sensor.

  • Selectable full scale ranges: 250/500/2000 degrees per second (DPS).
  • Resolution: 16-bit.
  • Bandwidth: user selectable.
  • Sensitivity: 8.75/17.50/70 milli-degrees per second/LSB.
  • Nonlinearity: 0.2% full scale
  • Rate noise density: 0.03 DPS/sqrt(Hz).
  • Operating temp range: -40 to +85°C.

Digital I/O

4 MOSFET switches are included. They provide 6-amperes momentary current sinking. Example uses include high power strobes, and lights for night launches or buzzers for location. Switches can be activated at apogee or prior to landing for model rocketry. A continuity check through an analog to digital converter allows verification of circuit continuity before launch. A piezoelectric buzzer provides software control for audible alert and low battery voltage measurement.

/media/uploads/AstrodyneSystems/mosfet.jpg

Host USB Type-A with 5.0 Vdc regulator

USB Type-A connector wired as a host controller provides regulated 5 volt power from a battery. A variety of USB devices from memory sticks, Bluetooth, and Wi-Fi can be used with multiple software projects from the mbed web site.

XBee® and XBee-PRO® Modules

The XBee-PRO® interface supports multiple different XBee and XBee-PRO modules such as Wi-Fi, ZigBee, 802.15.4, Bluetooth, and longer range 900 MHz RF Modules. Compatible modules are Roving Networks and Digi-International. SCIboard provides dual 10 pin headers with regulated 3.3 volt power (from p40) and serial UART (Tx=p9/Rx=p10). Alternatively if the headers are not installed, the serial port may be connected to a SMS cell phone evaluation module. Since the 3.3 volt provided to XBee modules is from the mbed regulator, the user is responsible for power calculations. Testing was done with RN-XV and a 9-volt battery but higher battery voltages or higher current XBee modules could overheat the 3.3 volt regulator on the mbed. When using XBee modules, the user may need to perform hard/soft iron calibration if using the magnetometer.

Interface for GPS

SCIboard provides a serial UART interface for GPS receivers. It also provides 3.3 and 5.0 Vdc for power and Vbat (battery not included). PCB has 0.1” holes for soldered cable or header of your choice. This provides flexibility to use a variety of GPS modules.

/media/uploads/AstrodyneSystems/gps.jpg

Interface for Ethernet Cable

PCB has 0.1” interface for an Ethernet cable of your choice of Ethernet magnetics interface with LEDs. For Ethernet direct wire, use RD-, RD+, TD+, and TD-. For magnetics, several 3.3 Vdc and Grounds are provided allowing easy interfacing. For both LEDs a 160 ohm resistor is provided. Both LEDs share the 2 PWMs out.

/media/uploads/AstrodyneSystems/ethernet.jpg

Interface for PWM RC Servos

SCIboard provides a Pulse Width Modulation (PWM) header for RC servo motors. Up to 6 PWM servos can be controlled. Terminal block is provided for separate servo power source if desired. If the user chooses to not install the headers, the PCB has 0.1” spacing thru-holes for 3-pin R/C servos. (Pins 21 – 26)

/media/uploads/AstrodyneSystems/pwm.jpg

Applications

A 10-Degree-Of-Freedom Inertial Measurement Unit (IMU) can be used to measure distance traveled, velocity, acceleration, attitude (yaw, pitch, and roll), and attitude rate. When combined with a GPS, SCIboard will provide a GPS aided inertial navigation solutions. The PWM can be used to control a camera attached to a servo motor. This enables near space projects to point the camera up at the weather balloon, horizontally at the earth’s horizon, and down directly at the earth.

  1. College and high school science labs
  2. Science Fairs
  3. High Power Model Rocketry
  4. Near Space Balloons
  5. Quadcopters
  6. R/C Airplanes
  7. R/C Helicopter

Processor Board Support (Direct Pin-Out compatible)

  • mbed LPC1768
  • mbed LPC11U24
  • Embedded Artists LPCexpresso LPC1769

SCIboard_ConfigFile.cpp@5:dc778a682d29, 2014-04-06 (annotated)

Committer:
AstrodyneSystems
Date:
Sun Apr 06 19:03:29 2014 +0000
Revision:
5:dc778a682d29
Parent:
2:6698a2433bfd 
Added ublox GPS

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AstrodyneSystems 2:6698a2433bfd 1 /* SCIboard(TM) ConfigFile.cpp
AstrodyneSystems 2:6698a2433bfd 2 Copyright (c) 2013 K. Andres
AstrodyneSystems 2:6698a2433bfd 3
AstrodyneSystems 2:6698a2433bfd 4 Permission is hereby granted, free of charge, to any person obtaining a copy
AstrodyneSystems 2:6698a2433bfd 5 of this software and associated documentation files (the "Software"), to deal
AstrodyneSystems 2:6698a2433bfd 6 in the Software without restriction, including without limitation the rights
AstrodyneSystems 2:6698a2433bfd 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
AstrodyneSystems 2:6698a2433bfd 8 copies of the Software, and to permit persons to whom the Software is
AstrodyneSystems 2:6698a2433bfd 9 furnished to do so, subject to the following conditions:
AstrodyneSystems 2:6698a2433bfd 10
AstrodyneSystems 2:6698a2433bfd 11 The above copyright notice and this permission notice shall be included in
AstrodyneSystems 2:6698a2433bfd 12 all copies or substantial portions of the Software.
AstrodyneSystems 2:6698a2433bfd 13
AstrodyneSystems 2:6698a2433bfd 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
AstrodyneSystems 2:6698a2433bfd 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
AstrodyneSystems 2:6698a2433bfd 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AstrodyneSystems 2:6698a2433bfd 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
AstrodyneSystems 2:6698a2433bfd 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
AstrodyneSystems 2:6698a2433bfd 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
AstrodyneSystems 2:6698a2433bfd 20 THE SOFTWARE.
AstrodyneSystems 2:6698a2433bfd 21 */
AstrodyneSystems 2:6698a2433bfd 22
AstrodyneSystems 2:6698a2433bfd 23 #include "SCIboard_ConfigFile.h"
AstrodyneSystems 2:6698a2433bfd 24
AstrodyneSystems 2:6698a2433bfd 25 ConfigFile::ConfigFile(char *filename) {
AstrodyneSystems 2:6698a2433bfd 26 // printf("ConfigFile(%s)\n\r", filename);
AstrodyneSystems 2:6698a2433bfd 27 fp = fopen(filename,"r");
AstrodyneSystems 2:6698a2433bfd 28 if(fp==NULL)
AstrodyneSystems 2:6698a2433bfd 29 error("ConfigFile failure to open\r\n");
AstrodyneSystems 2:6698a2433bfd 30 }
AstrodyneSystems 2:6698a2433bfd 31
AstrodyneSystems 2:6698a2433bfd 32 ConfigFile::~ConfigFile() {
AstrodyneSystems 2:6698a2433bfd 33 closeFile();
AstrodyneSystems 2:6698a2433bfd 34 }
AstrodyneSystems 2:6698a2433bfd 35
AstrodyneSystems 2:6698a2433bfd 36
AstrodyneSystems 2:6698a2433bfd 37 void ConfigFile::closeFile(void) {
AstrodyneSystems 2:6698a2433bfd 38 // printf("ConfigFile::Close()\n\r");
AstrodyneSystems 2:6698a2433bfd 39 if(fp!=NULL)
AstrodyneSystems 2:6698a2433bfd 40 fclose(fp);
AstrodyneSystems 2:6698a2433bfd 41 fp=NULL;
AstrodyneSystems 2:6698a2433bfd 42 }
AstrodyneSystems 2:6698a2433bfd 43
AstrodyneSystems 2:6698a2433bfd 44 bool ConfigFile::getValue(char *key, bool *value) {
AstrodyneSystems 2:6698a2433bfd 45 char str[83];
AstrodyneSystems 2:6698a2433bfd 46 *value=0;
AstrodyneSystems 2:6698a2433bfd 47 if(getValue(key, str)) {
AstrodyneSystems 2:6698a2433bfd 48 *value = atoi(str);
AstrodyneSystems 2:6698a2433bfd 49 return true;
AstrodyneSystems 2:6698a2433bfd 50 }
AstrodyneSystems 2:6698a2433bfd 51 return false;
AstrodyneSystems 2:6698a2433bfd 52 }
AstrodyneSystems 2:6698a2433bfd 53
AstrodyneSystems 2:6698a2433bfd 54
AstrodyneSystems 2:6698a2433bfd 55 bool ConfigFile::getValue(char *key, int *value) {
AstrodyneSystems 2:6698a2433bfd 56 char str[83];
AstrodyneSystems 2:6698a2433bfd 57 *value=0;
AstrodyneSystems 2:6698a2433bfd 58 if(getValue(key, str)) {
AstrodyneSystems 2:6698a2433bfd 59 *value = atoi(str);
AstrodyneSystems 2:6698a2433bfd 60 return true;
AstrodyneSystems 2:6698a2433bfd 61 }
AstrodyneSystems 2:6698a2433bfd 62 return false;
AstrodyneSystems 2:6698a2433bfd 63 }
AstrodyneSystems 2:6698a2433bfd 64
AstrodyneSystems 2:6698a2433bfd 65
AstrodyneSystems 2:6698a2433bfd 66 bool ConfigFile::getValue(char *key, float *value) {
AstrodyneSystems 2:6698a2433bfd 67 char str[83];
AstrodyneSystems 2:6698a2433bfd 68 *value=0;
AstrodyneSystems 2:6698a2433bfd 69 if(getValue(key, str)) {
AstrodyneSystems 2:6698a2433bfd 70 *value = atof(str);
AstrodyneSystems 2:6698a2433bfd 71 return true;
AstrodyneSystems 2:6698a2433bfd 72 }
AstrodyneSystems 2:6698a2433bfd 73 return false;
AstrodyneSystems 2:6698a2433bfd 74 }
AstrodyneSystems 2:6698a2433bfd 75
AstrodyneSystems 2:6698a2433bfd 76
AstrodyneSystems 2:6698a2433bfd 77 bool ConfigFile::getValue(char *key, char *value) {
AstrodyneSystems 2:6698a2433bfd 78 char *ptr;
AstrodyneSystems 2:6698a2433bfd 79 char str[83];
AstrodyneSystems 2:6698a2433bfd 80
AstrodyneSystems 2:6698a2433bfd 81 if(fp == NULL)
AstrodyneSystems 2:6698a2433bfd 82 {
AstrodyneSystems 2:6698a2433bfd 83 strcpy(value, "");
AstrodyneSystems 2:6698a2433bfd 84 return false;
AstrodyneSystems 2:6698a2433bfd 85 }
AstrodyneSystems 2:6698a2433bfd 86
AstrodyneSystems 2:6698a2433bfd 87 fseek(fp, 0L, SEEK_SET);
AstrodyneSystems 2:6698a2433bfd 88
AstrodyneSystems 2:6698a2433bfd 89 while(fgets(str, 80, fp) != NULL) {
AstrodyneSystems 2:6698a2433bfd 90 ptr = strtok(str,":");
AstrodyneSystems 2:6698a2433bfd 91 if(!strcmp(str,key)) {
AstrodyneSystems 2:6698a2433bfd 92 ptr = strtok(NULL,":");
AstrodyneSystems 2:6698a2433bfd 93 if(ptr!=NULL) {
AstrodyneSystems 2:6698a2433bfd 94 strcpy(value,ptr);
AstrodyneSystems 2:6698a2433bfd 95 return true;
AstrodyneSystems 2:6698a2433bfd 96 }
AstrodyneSystems 2:6698a2433bfd 97 }
AstrodyneSystems 2:6698a2433bfd 98 }
AstrodyneSystems 2:6698a2433bfd 99
AstrodyneSystems 2:6698a2433bfd 100 return false;
AstrodyneSystems 2:6698a2433bfd 101 }
AstrodyneSystems 2:6698a2433bfd 102