Besides couple of threads I had started I have still some confusion regarding it.
I am rephrasing my query to make it more clear.
Figures may vary from previous thread & please correct me where I am wrong.
I have used a strain gauge with following specs:
Gauge factor = 2
Unstrained resistance = 1000ohm
max strain = 50000ue
I have attached the schematic.
1. I have connected 5V to wheatstone brigde & kept other three resistors as 1000ohm.
2. total percentage change in resistance = gauge factor * strain = 2*50000*10^-6 = 6%.
So total chnage in resistance = 60ohm.
3. I have connected a microcontroller to read the voltage. With 1 ohm change in strain gauge I read 1.249mV.
I don't know how I can calculate weight from it. There must be some mathematical realtionship between them.
How can I get with millivolts so much strain is produced or so muck kg of weight is applied.
I am rephrasing my query to make it more clear.
Figures may vary from previous thread & please correct me where I am wrong.
I have used a strain gauge with following specs:
Gauge factor = 2
Unstrained resistance = 1000ohm
max strain = 50000ue
I have attached the schematic.
1. I have connected 5V to wheatstone brigde & kept other three resistors as 1000ohm.
2. total percentage change in resistance = gauge factor * strain = 2*50000*10^-6 = 6%.
So total chnage in resistance = 60ohm.
3. I have connected a microcontroller to read the voltage. With 1 ohm change in strain gauge I read 1.249mV.
I don't know how I can calculate weight from it. There must be some mathematical realtionship between them.
How can I get with millivolts so much strain is produced or so muck kg of weight is applied.
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