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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

Full USB-ISS Documentation

The USB-ISS module is an enhanced version of our low cost USB-I2c module. The USB-ISS is able to connect to I2C, SPI and Serial buses as well as Digital I/O and Analog inputs.

	USB-I2C		USB-ISS
USB Powered
Support I2C at 100khz
Support I2C at 20khz-1000khz				Yes, 20,50,100,400 &1000khz
I2C + I/O
SPI Mode				24khz to 3Mhz
Serial Mode				300baud to 3Mbaud
I2C Direct				Used to build custom I2C sequences
Bootloader				Built in Bootloader alowing easy user updates
Supply power to external Circuit				Up to 80mA for USB-ISS
5v operation
3.3v operation
Mounting holes on PCB

Our 2nd generation tilt compensated compass, now better than ever with higher accuracy and lower price.

Full Technical Data, and the Compass FAQ


100% compatible with CMPS09 and works with all CMPS09 Examples.





Voltage - 3.3v-5v only required
Current - 25mA Typ.
Resolution - 0.1 Degree
Accuracy - Horizontal, typically 1%
Accuracy - Tilted to +/- 60 degrees, typically 1.5%
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
Low Cost - Best Price Compass Module Available

Controlled from over Ethernet using simple TCP/IP commands.

Full ETH-RLY02 Documentation





Number of Relay's - 2
Power - 12V DC adaptor, supplied separately.
Control interface - HTTP (webpage) or TCP/IP over Ethernet.
Relay current - Up to 16Amp @24vdc or 250vac
Connections - Screw Terminals for N/O N/C and Common contacts.

Free Android and iPhone Apps are available to remotely control this module.

Full Technical Data, and the FAQ,
a little History and some Example programs.




Voltage - 5v only required
Current - 15mA Typ. 3mA Standby.
Frequency - 40KHz
Range - 3cm - 6m.
Max Analogue Gain - Variable 94 to 1025 in 32 steps.
Connection - Standard I2C Bus.
Light Sensor - Front Facing light sensor.
Timing - Fully timed echo, freeing host controller of task.
Echo - Multiple echo - keeps looking after first echo.
Units - Range reported in uS, cm or inches.
Small Size - 43mm x 20mm x 17mm height.

Controlled from over Ethernet using simple TCP/IP commands.

Full ETH-RLY16 Documentation



Number of Relay's - 8
Power - 12V DC adaptor, supplied separately.
Control interface - HTTP (webpage) or TCP/IP over Ethernet.
Relay current - Up to 16Amp @24vdc or 250vac
Connections - Screw Terminals for N/O N/C and Common contacts.

Free Android and iPhone Apps are available to remotely control this module.

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, cm or inches.
Light Weight - 4.6gm

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

Powered and Controlled from the USB bus.

Full USB-RLY08-B Documentation



Number of Relay's - 8
Power - Powered from standard USB bus
Control interface - USB
Relay current - Up to 1Amp @30vdc or 60vac. 500mA@110vac. 250mA@250vac
Connections - Screw Terminals for N/O N/C and Common contacts.

The USB-RLY08-B is an update of the USB-RLY08 below. It uses a different USB driver, otherwise is a drop in replacement.

Universal Pan Tilt Bracket for all Sonar and Infrared Rangers. Kit includes two brackets with slightly different drill patterns, a servo mounting bracket and fixing hardware.


Servo's are not included in the kit and should be ordered separately. Our miniature servo below is ideal for the Tilt. Either the standard or miniature servo can be used for Pan.

Assembly Instructions