Umarim v1.0
...UNDER CONSTRUCTION...
The ENAC team has been working on long endurance airplanes for a while now. It appeared that one of the many limitations was the integration of the electronic part into the new fuselages which are becoming thinner and thinner. So we started to work on a new version of autopilot mainly based on the well-known tiny. The new sensors becoming smaller and smaller, we were able to integrate onto the board the IMU and a new design of barometer. So now, the ENAC team is proud to present you the UMARIM! (which means "I Hope" in turkish)
Hardware Revision History
| Version # | Release Date | Release Notes |
|---|---|---|
| v1.0 | 09/2011 | Initial release of Umarim |
Features
- NXP LPC2148 MCU based
- 1 x Triple axis Digital Gyroscope (Invensense ITG-3200)
- 1 x Triple axis Digital Accelerometer (Analog Devices ADXL345)
- 1 x Digital Baro-altimeter (Freescale MPXA6115 pressure sensor + Texas Instruments ADS1114 16bits ADC/PGA)
- 6 x Servo PWM outputs
- 1 x R/C receiver PPM frame input
- 2 x UART (TTL 3.3V, 5V tolerant)
- 2 x I2C bus
- 1 x SPI bus
- 1 x USB (client)
- 4 x General Purpose I/O or Analog input channels (0V - 3.3V)
- 5v / 1.5A switching power supply (input voltage range 5.5V min → 17.0v max)
- 3.3v / 1A linear regulator
- 2 x status LEDs
- 9 grams (0,32 oz)
- 56 x 25mm (2.2" x 0.98")
- 4 layers PCB design
Umarim v1.0 3D bottom view
Umarim v1.0 3D top view
Umarim v1.0 top side
Umarim v1.0 bottom side
Architecture
Pinout
Pins Name and Type are specified with respect to the Autopilot Board
| Pin # | Name | Type | Description | Suggested Color |
|---|---|---|---|---|
| 1 | GND | PWR | common ground | Black |
| 2 | +5V | PWR | 5V Rail from autopilot | Orange |
| 3 | SRVx | OUT | Servo signal (PWM) | White |
| Pin # | Name | Type | Description | Suggested Color |
|---|---|---|---|---|
| 1 | GND | PWR | common ground | Black |
| 2 | +5v | PWR | 5V Rail from autopilot | Orange |
| 3 | PPM_IN | IN | PPM Stream from R/C Receiver (5V tolerant) | White |
| Pin # | Name | Type | Description | Suggested Color |
|---|---|---|---|---|
| 1 | GND | PWR | common ground | Black |
| 2 | +3.3V | PWR | 3.3V Rail from autopilot | Red |
| 3 | SSEL1 | IN | SSP Slave Select. Selects the SSP interface as a slave (SSEL1) | Brown |
| 4 | MOSI1 | I/O | SPI1 Master Out Slave In. Data output from master / data input to slave | Grey |
| 5 | MISO1 | I/O | SPI1 Master In Slave Out. Data input to master / data output from slave | Green |
| 6 | DRDY1 | IN | External interrupt 0 input (EINT0) | Purple |
| 7 | SCK1 | I/O | SPI1 Serial clock. Clock output from master or input to slave | Yellow |
| Pin # | Name | Type | Description | Suggested Color |
|---|---|---|---|---|
| 1 | GND | PWR | common ground | Black |
| 2 | +5V | PWR | 5V Rail from autopilot | Orange |
| 3 | +3.3V | PWR | 3.3V Rail from autopilot | Red |
| 4 | AUX1 | I/O | General Purpose I/O #1 or ADC Input (AD1.5) | |
| 5 | AUX2 | I/O | General Purpose I/O #2 or ADC Input (AD1.4) | |
| 6 | AUX3 | I/O | General Purpose I/O #3 or ADC Input (AD1.3) | |
| 7 | AUX4 | I/O | General Purpose I/O #4 or ADC Input (AD1.2) |
| Pin # | Name | Type | Description | Suggested Color |
|---|---|---|---|---|
| 1 | GND | PWR | common ground | Black |
| 2 | +3.3V | PWR | 3.3V Rail from autopilot | Red |
| 3 | RXD0 | IN | UART0 Serial Input (3.3V level, 5V Tolerant) | Green |
| 4 | TXD0 | OUT | UART0 Serial Output (3.3V level) | Blue |
| Pin # | Name | Type | Description | Suggested Color |
|---|---|---|---|---|
| 1 | GND | PWR | common ground | Black |
| 2 | +3.3V | PWR | 3.3V Rail from autopilot | Red |
| 3 | RXD1 | IN | UART1 Serial Input (3.3V level, 5V Tolerant) | Green |
| 4 | TXD1 | OUT | UART1 Serial Output (3.3V level) | Blue |
| Pin # | Name | Type | Description | Suggested Color |
|---|---|---|---|---|
| 1 | GND | PWR | common ground | Black |
| 2 | +3.3V | PWR | 3.3V Rail from autopilot | Red |
| 3 | SDA0 | Open Drain I/O |
I2C0 bus Serial DAta | Brown |
| 4 | SCL0 | Open Drain I/O |
I2C0 bus Serial CLock | Blue |
| Pin # | Name | Type | Description | Suggested Color |
|---|---|---|---|---|
| 1 | GND | PWR | common ground | Black |
| 2 | +3.3V | PWR | 3.3V Rail from autopilot | Red |
| 3 | SDA1 BOOT |
Open Drain I/O |
I2C1 bus Serial DAta In-Circuit Serial Programming (ISP) enable (P0.14, +3.3v pullup) (Note) |
Brown |
| 4 | SCL1 | Open Drain I/O |
I2C1 bus Serial CLock | Blue |
Note: Holding this pin low for at least 3mS after a RESET (or power up) instructs the controller to enter programming mode.
| Pin # | Name | Type | Description | Suggested Color |
|---|---|---|---|---|
| 1 | GND | PWR | common ground | Black |
| 2 | USB+ | I/O | USB bidirectional D+ line | Green |
| 3 | USB- | I/O | USB bidirectional D- line | White |
| 4 | VBUS | IN | Indicates the presence of USB bus power (P0.23) (5V level) | Orange |
Schematic
PCB
Gerber & Drill Files
PCB design Eurocircuits 6-C class compliant:
Download Umarim v1.0 gerber & drill files (zip)
RS274X, units = Inches, format = 2:5
- Umarim_v1-0_SILKSCREEN_TOP.GBR (Top Component Print Layer)
- Umarim_v1-0_SOLDERMASK_TOP.GBR (Top Solder Mask)
- Umarim_v1-0_SIGNAL_TOP.GBR (Top Copper Layer)
- Umarim_v1-0_INTERNAL_PLANE_1.GBR (Internal Copper Layer GND)
- Umarim_v1-0_INTERNAL_PLANE_2.GBR (Internal Copper Layer +3.3V)
- Umarim_v1-0_SIGNAL_BOTTOM.GBR (Bottom Copper Layer)
- Umarim_v1-0_SOLDERMASK_BOTTOM.GBR (Bottom Solder Mask)
- Umarim_v1-0_OUTLINE.GBR (Board Outline)
- Umarim_v1-0_DRILL.GBR (NC XY coordinates & Drill tools sizes)
Assembly
Components Layout
Umarim v1.0 bottom components Layout
Umarim v1.0 top components Layout
Umarim v1.0 bottom components detail
Umarim v1.0 top components detail
Bill Of Material
Download Umarim v1.0 Bill Of Material (zipped .xls file)
PCB and assembled boards suppliers
Hopefully, available soon on Get Hardware page :)
Mechanical Dimensions
