This page will show you how to use the TD-CMP modules in a way which fits you most.
Here are the technical specifications of the modules:
- Compass: Resolution: 1° – Accuracy: 3°
- Tilt/Roll: (TD-CMP02 and TD-CMP03 only) Resolution: 2° – Accuracy: 5°
- Temperature: (TD-CMP03 only) Resolution= 1°C/F – Accuracy =1°
- New: Sampling rate: 12,5 to 25 samples/second.
- Easy Tilt/Roll calibration.(TD-CMP02 and TD-CMP03 only)
- Interfaces: I²C, RS232 and mini-USB (as a HID device: PID=0461, VID= 1023)
- Powered by USB bus or an external 5V.
- Direct LCD readout possible. LCD contrast by user.
- Low power LED lights when facing North (angle within 11,25° both left and right from North.)
- USB Windows application (written in C#) available for free download.) Compatible with WinXp/Vista.
- Source code (CCS C and C# .NET) and schematics (Eagle) can be purchased separately.
- Module software is 100% upgradable with a simple bootloader.
- PCB Dimensions: 40 x 41 mm or 1″57 x 1″61, weight: 10 grams.
These assembled modules are available from our online shop.
You may also purchase the bare pcb, a KIT DIY* version and the source code. KIT step-by-step construction guide.
New: compass calibration.
Schematics and pcb diagrams available for download. Last update: November 26, 2009.
DIY* = Do It Yourself
Power Source: JP4: Connect pin 2 to pin 3 to power the module directly from USB. Connect pin 1 to pin 2 when powered externally via JP3, pin 1.
New: Increase sampling speed from 12,5/second to 25/second: connect SPEED1 to SPEED2 (JP3, pin4 to JP3, pin2.)
LCD contrast Adjust: Connect pin 5, JP3 to +5V before powering up. Release when the desired the contrast is reached.
Tilt/Roll Calibration: (TD-CMP02 and TD-CMP03 only):
- First place the module on a completely flat surface, power up.
- Then shortly apply +5V (pin 1, JP2) to ADJUST (pin 5, JP3) Release after 1 second.
- Check readings when applying tilt/roll to the module. Repeat the calibration procedure if necessary. Done.
Compass Calibration: (do not touch the PCB or chips whilst calibrating.)
- First place the module on a completely flat surface, power up, head to North (position as shown in diagram and picture above), then turn the module slowly 360° (make 2-3 full clockwise and/or counter-clockwise spins.)
- Now apply +5V (pin 1, JP2) to ADJUST (pin 5, JP3) Wait for 8-10 seconds; the LED will flash 3 times. Release the ADJUST pin from +5V. Power off and on.
- Check compass readings when heading the module to N, S, E, W. Repeat the calibration procedure if necessary. Done.
Module RESET: apply GND to MCLR pin.
Temperature sensor: (TD-CMP03 only): The external LM335Z sensor connects to JP3 pin 4 and 6. No temperature will be displayed when the sensor is removed.
RS232 interface:
JP2 provides the interface to connect to your COM port and hyper terminal. Communications @ 115200 bpS, 8N1.
Read more: Roll and Temperature sensor applications using PIC18F2550