Hi all,
I'm not an electronics expert, hence I guess my question on this forum.
I'm using a temperature sensor the TC1047A in my project. As A/D Convertor I'm using the H-Tronic HB628 board.
The circuit design as attached (see TC1047A) I "stole" form the documentation of the board. Although the sensor should be calibrated within 1 degree celsius, this doesn't appear to be working in my application. Besides the output not being accurate the output is also fluctuating quite a bit.
The +5V power is derived from a USB laptop connection through the HB628 board.
The distance between the sensor and my experimental board is approx. 50cm and the sensor is connected by 2x a twisted-pair. The last bit to the sensor with "winding-copper", (difficult to solder), since the device is actually an SMD device. See ConnetionSensor for a schematic lay-out how I build this connection. I'm using a mini-jack female at the end that connects to the male variant that goes with 2xtwisted pair again to the experimental-print-board that connects throught a flat-cable to the HB628 board.
I guess the diode is not really necessay, since the original design is using a TC1047 [without the A], which accepts lower-input voltage than the A version. Or does it serve another purpose?
Anyway who can help me and advise me how to improve the performance?
Regards, Martin
I'm not an electronics expert, hence I guess my question on this forum.
I'm using a temperature sensor the TC1047A in my project. As A/D Convertor I'm using the H-Tronic HB628 board.
The circuit design as attached (see TC1047A) I "stole" form the documentation of the board. Although the sensor should be calibrated within 1 degree celsius, this doesn't appear to be working in my application. Besides the output not being accurate the output is also fluctuating quite a bit.
The +5V power is derived from a USB laptop connection through the HB628 board.
The distance between the sensor and my experimental board is approx. 50cm and the sensor is connected by 2x a twisted-pair. The last bit to the sensor with "winding-copper", (difficult to solder), since the device is actually an SMD device. See ConnetionSensor for a schematic lay-out how I build this connection. I'm using a mini-jack female at the end that connects to the male variant that goes with 2xtwisted pair again to the experimental-print-board that connects throught a flat-cable to the HB628 board.
I guess the diode is not really necessay, since the original design is using a TC1047 [without the A], which accepts lower-input voltage than the A version. Or does it serve another purpose?
Anyway who can help me and advise me how to improve the performance?
Regards, Martin