Hi,
Yes we really need more information. I've tried "enhancing" the photo but can see no sign of any part numbers on the central chip. But it's common for manufacturers to hide the identity of critical components, to reduce copying. So it would be helpful to have photos of the underside of the PCB, the magnet in the rotor, the exact connections of the 3 (or 4) wires in the cable and a description of any details not obvious in the photos..
But I do like a good detective problem so here are a few clues so far, which perhaps suggest that it's not a Fine Offset:
- The PCB is dated March 2011, so it would be surprising if it's not been seen before from such a "popular" manufacturer as FO.
- FO generally don't use plastic microcontroller packages but direct "Chip on Board" technology.
- As mentioned above, a "loop through" socket for the anemometer is not included. But FO normally aim for maximum "backwards compatibility" (e.g using the "Rain" socket for the "Solar Pod" on the WH-308x stations).
The legend on the PCB beside the cable connections says "VDD - DATA - WIND - GND", how are the Black (and Yellow ?) wires connected (at both ends)?
Finally, some more background technical detail (in case this is a FO development). The "old" FO stations used a Thermistor for the external temperature, which shared the input of an Analogue-Digital Converter with the Vane resistor (using two "Enable" pulses). The ADC used the resistance of the Vane/thermistor to define a time (delay) which was counted by the microcontroller to produce a digital value.
After some years, the thermistor was removed (so the vane had sole use of the ADC), with the temperature apparently being obtained in a direct serial data format (SPI Bus) from the (updated) Humidity sensor. IMHO it would be quite difficult for a microcontroller (on the Vane PCB) to emulate a variable resistance for the ADC in an unchanged External Transmitter. So I suspect it may be now a digital interface.
Cheers, Alan.
Yes we really need more information. I've tried "enhancing" the photo but can see no sign of any part numbers on the central chip. But it's common for manufacturers to hide the identity of critical components, to reduce copying. So it would be helpful to have photos of the underside of the PCB, the magnet in the rotor, the exact connections of the 3 (or 4) wires in the cable and a description of any details not obvious in the photos..
But I do like a good detective problem so here are a few clues so far, which perhaps suggest that it's not a Fine Offset:
- The PCB is dated March 2011, so it would be surprising if it's not been seen before from such a "popular" manufacturer as FO.
- FO generally don't use plastic microcontroller packages but direct "Chip on Board" technology.
- As mentioned above, a "loop through" socket for the anemometer is not included. But FO normally aim for maximum "backwards compatibility" (e.g using the "Rain" socket for the "Solar Pod" on the WH-308x stations).
The legend on the PCB beside the cable connections says "VDD - DATA - WIND - GND", how are the Black (and Yellow ?) wires connected (at both ends)?
Finally, some more background technical detail (in case this is a FO development). The "old" FO stations used a Thermistor for the external temperature, which shared the input of an Analogue-Digital Converter with the Vane resistor (using two "Enable" pulses). The ADC used the resistance of the Vane/thermistor to define a time (delay) which was counted by the microcontroller to produce a digital value.
After some years, the thermistor was removed (so the vane had sole use of the ADC), with the temperature apparently being obtained in a direct serial data format (SPI Bus) from the (updated) Humidity sensor. IMHO it would be quite difficult for a microcontroller (on the Vane PCB) to emulate a variable resistance for the ADC in an unchanged External Transmitter. So I suspect it may be now a digital interface.
Cheers, Alan.