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Full USB-I2C Documentation

The USB-I2C module is a low cost USB to I2C module, with a simple command set, and interfacing to any I2C device.

The USB-I2C module provides a complete interface between your PC and the I2C bus. The module is self powered from the USB cable and can supply up to 70mA at 5v for external circuitry from a standard 100mA USB port.

I2C Devices - Any registered or unregistered I2C device.
Host support - Drivers available for Windows XP64, XP, 2000, ME, 98, CE.NET V4.2, Linux, Mac OS8, OS9, OSX.
Voltage - Self powered - 5v available
Current - Up to 70mA available for your own circuits
On-board Pull-up resistors - 4.7k
Digital I/O - 1 Input and 2 I/O available when not using I2C.
Analogue Input - 2 10-bit channels available when not using I2C.

Lowest cost ultrasonic ranger with both I2C and Serial interfaces. New AutoTune algorithms intelligently back the minimum range right up to the transducer ringdown for the very best performance possible, automatically, in the background, and with no calibration cycles necessary. Additional new commands allow for separate burst and ranging control.

SRF02
Range - 16cm to 6m.
Power - 5v, 4mA Typ.
Frequency - 40KHz.
Size - 24mm x 20mm x 17mm height.
Analogue Gain - Automatic 64 step gain control
Connection Modes
1 - Standard I2C Bus.
2 - Serial Bus - connects up to 16 devices to any uP or UART serial port
Full Automatic Tuning - No calibration, just power up and go
Timing - Fully timed echo, freeing host controller of task.
Units - Range reported in uS, mm or inches.
Light Weight - 4.6gm

Full Technical Data, and the Compass FAQ


Many examples available for popular controllers.







Voltage - 3.3v-5v only required
Current - 25mA Typ.
Resolution - 0.1 Degree
Accuracy - Horizontal, 3-4 degrees.
Accuracy - Tilted to +/- 60 degrees, 4-5 degrees
Output 1 - I2C Interface, SMBUS compatible, 0-255 and 0-3599 , 100khz
Output 2 - Serial port, 9600 baud, no parity, 2 stop bits and 3.3v-5v signal levels
Output 3 - Timing Pulse 1mS to 37mS in 0.1mS increments
Small Size - 24mm x 18mm

Full Technical Data, and the FAQ,
and some Example programs.

Designed for use in car parks, the SRF485 is suitable for use whenever a large number of sonar's are required.


Voltage - 8v to 14v, 12v nominal.
Current - 10mA
Frequency - 40KHz
Range - 60cm to 500cm
Connection - Standard RS485 Bus
Up to 127 SRF485WPR's connected to your controller.
Units - Range reported in uS, cm or inches.
Temperature Compensation -30 to +50 centigrade

Powered and Controlled from the USB bus.

Full USB-RLY02 Documentation





Number of Relay's - 2
Power - Powered from standard USB bus
Control interface - USB
Relay current - Up to 16Amp @24vdc or 250vac
Connections - Screw Terminals for N/O N/C and Common contacts.

The MD03 is a medium power motor driver, designed to supply power beyond that of any of the low power single chip H-Bridges that exist. Main features are ease of use and flexibility. The motor's power is controlled by on-board Pulse Width Modulation (PWM) generators driving the H-Bridge Transistors.

Full MD03 Documentation
Voltage - 5v logic supply and 5v - 24v for the motor
Current - 50mA Max for logic and up to 20A for the motor
Control 1 - 0v - 2.5v - 5v Analogue for Reverse - Stop - Forward
Control 2 - 0v - 5v (or PWM equiv.) with separate direction control
Control 3 - RC Mode - Controlled by standard Radio Control system. Direct connection to RC receiver. (1mS - 2mS pulse with 1.5mS center off).
Control 4 - I2C Interface, full control, acceleration and status reporting. Up to 8 modules on bus. SCL speed up to 1MHz
Current limiter - Preset at 20A
Temperature limiter - Reduces power gracefully if module overheats
Size - 113mm x 52mm x 30mm

USB-RS485 Documentation

The USB-RS485 is a complete, self powered, USB to RS485 interface working at any baud rate up to 250k baud. It features automatic bus turn-around - any time your not transmitting the module is listening.
Uses the MAX487 quarter power tranceiver, so you can have up to 128 devices on the bus.


USB interface uses the FTDI chip which has drivers available for Windows XP64, XP, 2000, ME, 98, CE.NET V4.2, Linux, Mac OS8, OS9, OSX.

Detects a candle flame at a range 2 metres (6ft) and is unaffected by ambient light!
Detect Human Body heat!
Servo control for image construction!



8 Pixel Thermal Array Sensor

Voltage - 5v only required
Current - 5mA Typ. excluding servo
Temperature Range - 4°C - 100°C
Accuracy (Full FOV) - +/-2°C +/-2% from 10°C to 100°C,
Accuracy (Full FOV) - +/-3°C from 4°C to 10°C
Field of View - 41° x 6° (8 pixels of approx. 5° x 6°)
Outputs - 1 ambient + 8 pixel temperatures
Communication - I2C Interface
Servo - Controls servo in 32 steps to 180° rotation
Small Size - 31mm x 18mm
Full Technical Data

Full Technical Data, and the FAQ,
and some Example programs.

World beating performance - the SRF01 employs our 2nd generation AutoTune technology which allows ranging all the way down to zero on a single transducer sonar.


Voltage - 3.3v to 12v
Current - 25mA Ranging. 11mA Standby. 55uA Sleep.
Frequency - 40KHz
Range - 18cm to 600cm (Industrial spec', no calibration required).
Range - 0cm to 600cm (Hobby spec' after auto-calibration).
Connection - One Pin Serial Bus @ 9600 baud.
Up to 16 SRF01's connected to a single pin on your controller.
Units - Range reported in cm or inches.
Very light weight, just 2.7gm

Supplied with Mounting Grommet.
For a suitable cable - see our JST Cables

Full LCD03 Documentation

Display - 20 characters per row, 4 rows
Voltage - 5v only required
Current - 280mA typ. with backlight on
Modes - I2C or 9600 baud Serial
Keypad - Automatic scanning of a 3x4 matrix keypad
Custom characters - up to 8 custom characters easily defined

Backlight defaults off, and can be turned on under software control