TWOG/v1.0

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Twog v1.00 3D top view Twog v1.00 3D bottom view

"Tiny WithOut Gps".
To provide more flexible airframe installation, EMI trouble resolution, and GPS hardware optimization, the "TWOG" (a version of Tiny v2 with no GPS receiver or antenna) is now available.

Hardware Revision History

Version # Release Date Release Notes
v1.00 04/2008 Initial release of Twog v1

Features

  • Single LPC2148 MCU
  • 8 x Analog input channels 0V - 3.3V (2 channels with optional on-board resistor bridge)
  • 1 x 3.3V TTL UART (5V tolerant)
  • 8 x PWM outputs
  • 1 x R/C receiver PPM frame input
  • 1 x SPI bus
  • 1 x I2C bus
  • 1 x USB (client)
  • 5v / 2.25A switching power supply (input voltage range 6.1v → 18v)
  • 3.3v / 1A linear regulator
  • 3 x status LEDs with attached test point
  • 8 grams (0.28 oz)
  • 40.2 x 30.5mm (1.6" x 1.2")
  • 2 layers PCB design, 0603 components

Architecture

Twog v1 architecture.png

Pinout

Pins Name and Type are specified with respect to the Autopilot Board

Twog v1-00 pinout.png


SERIAL
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +5V PWR 5V Rail from Tiny Orange
3 +3.3V PWR 3.3V Rail from Tiny Red
4 DTR
5 CTS
6 RTS
7 RXD1 IN UART1 Serial Input (3.3V level, 5V Tolerant) Green
8 TXD1 OUT UART1 Serial Output (3.3V level) Blue


SPI
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +3.3V PWR 3.3V Rail from Tiny Red
3 SSEL IN SSP Slave Select. Selects the SSP interface as a slave (SSEL1) Brown
4 MOSI I/O SPI1 Master Out Slave In. Data output from master or data input to slave Grey
5 MISO I/O SPI1 Master In Slave Out. Data input to master or data output from slave Green
6 DRDY IN External interrupt 0 input (EINT0) Purple
7 SCK I/O SPI0 Serial clock. Clock output from master or input to slave Yellow


PPM
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +5v PWR 5V Rail from Tiny to R/C receiver supply Orange
3 PPM_IN IN PPM Stream from R/C Receiver (5V tolerant) White
4 SERV_RST OUT external PPM decoder reset (Note 1)
5 SERV_CLK OUT external PPM decoder clock (Note 1)

Note 1 : Used only if servos are connected to the R/C receiver


USB
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +3.3V PWR 3.3V Rail from Tiny Red
3 USB+ I/O USB bidirectional D+ line Green
4 USB- I/O USB bidirectional D- line White
5 VBUS IN Indicates the presence of USB bus power (P0.23) (5V level) Orange
6 BUTTON IN External Button (+3.3v pullup)
7 LED3 OUT GPIO (LED #3 command)
8 ADC_7 IN Analog to Digital Converter Input #7


IRV
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +3.3V PWR 3.3V Rail from Tiny Red
3 IRV IN Vertical IR Sensor signal (Analog to Digital Converter Input #0) Purple


IRH
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +3.3V PWR 3.3V Rail from Tiny Red
3 IRH_2 IN Horizontal IR Sensor signal axis 2 (Analog to Digital Converter Input #2) Grey
4 IRH_1 IN Horizontal IR Sensor signal axis 1 (Analog to Digital Converter Input #1) Brown


ADC1
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +5v PWR 5V Rail from Tiny Orange
3 +3.3V PWR 3.3V Rail from Tiny Red
4 ADC_4 IN Analog to Digital Converter Input #4
5 ADC_3 IN Analog to Digital Converter Input #3


ADC2
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +5v PWR 5V Rail from Tiny Orange
3 +3.3V PWR 3.3V Rail from Tiny Red
4 ADC_6 IN Analog to Digital Converter Input #6 (Maximum input level can be selected with R12 value)
5 ADC_5 IN Analog to Digital Converter Input #5 (Maximum input level can be selected with R13 value)


DOWNLOAD/GPS
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +5v PWR 5V Rail from Tiny Orange
3 +3.3V PWR 3.3V Rail from Tiny Red
4 BOOT IN In-Circuit Serial Programming (ISP) enable (P0.14, +3.3v pullup) (Note 2)
5 GPS_RESET IN leave unconnected, hold this pin low only for bootloader programming
6 TXD0 OUT UART0 Serial Output (usable with an external GPS receiver) Blue
7 RXD0 IN UART0 Serial Input (usable with an external GPS receiver) Green

Note 2 : Holding this pin low for at least 3mS after a RESET (or power up) instructs the controller to enter programming mode.


I2C
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +5V PWR 5V Rail from Tiny Orange
3 +3.3V PWR 3.3V Rail from Tiny Red
4 SDA I/O I2C bus Serial DAta
5 SCL I/O I2C bus Serial CLock


CAM
Pin # Name Type Description Suggested Color
1 GND PWR common ground Black
2 +5V PWR 5V Rail from Tiny Orange
3 +3.3V PWR 3.3V Rail from Tiny Red
4 CAM_SW OUT video source/payload selection signal
5 SRV_1 OUT Servo PWM signal #1
6 SRV_5 OUT Servo PWM signal #5
7 AUX PWR video/payload switchable 5V power suply

Schematic

Twog v1.00 Schematic


PCB

Gerber & Drill Files

Download Twog v1.00 gerber & drill files (zip)

RS274X, units = Inches, format = 2:5

  • Twog_v1-00.GTO (Top Component Print Layer)
  • Twog_v1-00.GTS (Top Solder Mask)
  • Twog_v1-00.GTL (Top Copper Layer)
  • Twog_v1-00.GBL (Bottom Copper Layer)
  • Twog_v1-00.GBS (Bottom Solder Mask)
  • Twog_v1-00.DRI (NC XY coordinates & Drill tools sizes)

Assembly

Components Layout

Bill Of Material

Download Twog v1.00 Bill Of Material (zipped .xls file)


Qty Manufacturer part # Schematic part name / value Designator Description Manufacturer Package Optional Digikey.com Other distributor
Resistors
2 ERJ-3EKF33R0V 33 R21, R22 1/16W, 5% Panasonic 0603 P33HCT-ND
1 ERJ-3EKF1000V 100 R24 1/16W, 5% Panasonic 0603 P100HCT-ND
1 ERJ-3EKF3300V 330 R4 1/16W, 5% Panasonic 0603 P330HCT-ND
3 ERJ-3EKF1001V 1K R16, R17, R23 1/16W, 5% Panasonic 0603 P1.00KHCT-ND
3 ERJ-3EKF1501V 1.5K R2, R19, R20 1/16W, 5% Panasoni 0603 P1.50KHCT-ND
2 ERJ-3EKF1801V 1.8k (see note1) R13,R18 1/16W, 5% Panasonic 0603 P1.8KHCT-ND
3 ERJ-3EKF3301V 3.3K R3, R14, R15 1/16W, 5% Panasonic 0603 P3.3KHCT-ND
7 ERJ-3EKF1002V 10K R1, R6 to R11 1/16W, 5% Panasonic 0603 P10.0KHCT-ND
1 ERJ-3EKF1502V 15K (see note2) R12 1/16W, 5% Panasonic 0603 P15.0KHCT-ND
Capacitors
4 C0603C180J5GAC 18pF C26 to C29 50V, 5% Kemet 0603 399-1052-1-ND
18 C0603C104K5RAC 100nF C2,C3,C5 to C20 50V, 10% Kemet 0603 399-5089-1-ND
2 T520A336M006ATE070 33uF/6V C24, C25 SMD tantalum capacitor Kemet A case (EIA 3216-18) 399-4719-1-ND
2 TAJD107K020R 100uF/20V C1, C21 SMD tantalum capacitor AVX Corp. D case (EIA 7343-31) 478-1724-1-ND
Semiconductors
1 LM3940IMP-3.3 LM3940IMP-3.3 IC3 1A low dropout regulator for 5V to 3.3V conversion National Semic. SOT223 LM3940IMP-3.3CT-ND
1 TPS2051BDBV TPS2051B IC4 Current Limited Power Distribution Switch Texas Instr. SOT23-5 yes 296-21265-1-ND
1 LPC2148FBD64 LPC2148FBD64 IC5 Single-chip ARM7 32-bit microcontroller NXP LQFP64 568-1765-ND
1 CD4017BPW 4017 IC6 Decade Counter/Divider with 10 Decoded Outputs Texas Instr. TSSOP16 296-14252-1-ND
1 APT1608SURCK KP-1608SURC LED1 SMD Chip Red LED Lamp Kingbright 0603 yes 754-1123-1-ND
1 APT1608MGC KP-1608MGC LED2 SMD Chip Green LED Lamp Kingbright 0603 754-1118-1-ND
1 APT1608SYCK KP-1608SYC LED3 SMD Chip Yellow LED Lamp Kingbright 0603 yes 754-1124-1-ND
1 BC807-40 BC807 T1 PNP general purpose transistor NXP SOT23 568-1629-1-ND
Modules
1 PTH08080WAH PTH_08080W IC1 2.25A Wide-input adjustable switching regulator Texas Instr. specific 296-20432-ND
Connectors
7 53047-0310 SRV0, SRV4, SRV2, SRV6, IRV, SRV3, SRV7 J12 to J18 Picoblade 3 pins 1.25mm straight header Molex specific WM1732-ND
1 53047-0410 IRH J11 Picoblade 4 pins 1.25mm straight header Molex specific WM1733-ND
4 53047-0510 PPM,I2C,ADC2,ADC1 J4, J6, J8, J10 Picoblade 5 pins 1.25mm straight header Molex specific J6,J8,J10 WM1734-ND
3 53047-0710 SPI,CAM,DOWNLOAD/GPS J3, J5, J7 Picoblade 7 pins 1.25mm straight header Molex specific J3,J5 WM1736-ND
2 53047-0810 SERIAL,USB J2, J9 Picoblade 8 pins 1.25mm straight header Molex specific WM1737-ND
Other
1 405C35B12M00000 CTS405 12MHz Q1 SMD 12MHz Quartz Crystal CTS specific CTX639CT-ND


PCB and assembled boards suppliers

For private companies and enthusiast Paparazzi hardware suppliers, see Get Hardware page.

Downloads

Source files

Gerber & Drill files

Assembly files

Example

An example of connections from TWOG to airborne equipment

Eample electrical connections to the airborne equipment