The IR Seeker V3 detects IR signals from the HiTechnic IR Beacon or IR ball and by using two detectors it calculates the direction to the signal source.
The relative signal strength from left and right looking detector are combined to create approximate direction readings. These readings are simultaneously taken for both the 600Hz and 1200Hz beacon and ball frequencies. Direction readings to the left of center are negative, to the right of center are positive and dead ahead are zero.
The IR Seeker V3 I2C bus address of 0x38.
I2C Registers
| Addr. | Function |
| 0x00 | Sensor firmware rev |
| 0x01 | Manufacturer code |
| 0x02 | Sensor Id. code |
| 0x03 | Not used |
| 0x04 | Direction data – 1200Hz |
| 0x05 | Signal strength – 1200Hz |
| 0x06 | Direction data – 600Hz |
| 0x07 | Signal strength – 600Hz |
| 0x08/0x09 | Left side raw data – 1200Hz (lsb:msb) |
| 0x0A/0x0B | Right side raw data – 1200Hz (lsb:msb) |
| 0x0C/0x0D | Left side raw data – 600Hz (lsb:msb) |
| 0x0E/0x0F | Right side raw data – 600Hz (lsb:msb) |
Specifications
| Power | 5 volts DC. 20 mA max. |
| Standard 4 pin connector | For connection to 4 pin I2C port |
| Logic voltage levels | Logic 0 – 0 volts, Logic 1 – 5 volts |
| Wiring standard | Pin 1 – black – GndPin 2 – white – I2C SCLPin 3 – yellow – I2C SDA Pin 4 – red – +5v |
| I2C address | 0x38 |
| I2C address change option | No |
| I2C bus speed | 100KHz max. |
| Operating IR wavelength range | 850 – 940 nm. |
| IR modulation | 600 Hz and 1200 Hz |
| Internal sampling rate | 30 samples per second |
| Typical maximum range | 2.4 meters |
| Unit dimensions – LxWxH | 32 x 32 x 19 millimeters |
| Mounting holes | 24 x 24 millimeters square pattern |
| Unit weight | 12 grams |
| Wire length | 25 centimeters |
