Dear All
Perhaps this is where a little knowledge is a dangerous thing but I hope you guys can help. I want to build an electronic speedometer for a kit car. I was thinking that I could detect the rotation of the drive shaft, put some electronics in the middle and then drive a stepper motor connected to the input of a mechanical speedometer to do the job. It’s the electronic bit in the middle that’s beyond me!
The little knowledge I have gets me to the point of thinking that if I was to detect say the four bolt heads on the drive shaft flange as they passed say a hall type detector this would give me the speed related input signal. I would then want to process this signal to give the output to drive the stepper motor at the required speed. I would need to be able to vary the relationship between the input and out put signal to achieve the required calibration. For example one 360 deg rotation of the drive shaft may need to translate to only 120 deg rotation of the stepper motor etc.
Can anyone please point me in the right direction on this one.
Regards, and thanks in advance.
Rory
Perhaps this is where a little knowledge is a dangerous thing but I hope you guys can help. I want to build an electronic speedometer for a kit car. I was thinking that I could detect the rotation of the drive shaft, put some electronics in the middle and then drive a stepper motor connected to the input of a mechanical speedometer to do the job. It’s the electronic bit in the middle that’s beyond me!
The little knowledge I have gets me to the point of thinking that if I was to detect say the four bolt heads on the drive shaft flange as they passed say a hall type detector this would give me the speed related input signal. I would then want to process this signal to give the output to drive the stepper motor at the required speed. I would need to be able to vary the relationship between the input and out put signal to achieve the required calibration. For example one 360 deg rotation of the drive shaft may need to translate to only 120 deg rotation of the stepper motor etc.
Can anyone please point me in the right direction on this one.
Regards, and thanks in advance.
Rory