Hi.
Currently I have two 20kg load cell with raspberry and ads1115. They work good, but differents are 5-10 grs for each meassure. Now i'm using a good 5V to MicroUSB adapter for power the raspberry and also the load cell at 5V.
I just buy a new 10Kg sensor and i like to use the ADC of the Teensy. The new load cell need 6 to 14V (old are 5V same as raspberry).
Because the supply is very important for the noisy, i'm thinking in the following options:
A) 24V switch power supply as main
LM7805 with 2 capacitor for Teensy
LM7812 with 2 capacitor for LoadCell
B) 24V encapsulated transformer.
With same LM7805 and LM7812.
Because the encapsulated transformer is small is good for put into the board with all components.
I'm thinking in any like this:
http://es.farnell.com/myrra/44306/transformer-16va-24v/dp/1689098
C) Get the 12V directly using A or B method with 12V and remove the LM7812.
What will be the best option for get more stable supply for items?.
For make the measurement really i don't know what option do.
A) ADC from teensy using voltage divisor for down to 3.3V
B) ADS1115 i2c using voltage divisor for down to 5V (i'm familiar with this)
C) INA125, 128 ...
The objetive is the better meassurements because i use for largue items (500 grs) but with small items like 20 grs too.
Any help will be apreciated.
Currently I have two 20kg load cell with raspberry and ads1115. They work good, but differents are 5-10 grs for each meassure. Now i'm using a good 5V to MicroUSB adapter for power the raspberry and also the load cell at 5V.
I just buy a new 10Kg sensor and i like to use the ADC of the Teensy. The new load cell need 6 to 14V (old are 5V same as raspberry).
Because the supply is very important for the noisy, i'm thinking in the following options:
A) 24V switch power supply as main
LM7805 with 2 capacitor for Teensy
LM7812 with 2 capacitor for LoadCell
B) 24V encapsulated transformer.
With same LM7805 and LM7812.
Because the encapsulated transformer is small is good for put into the board with all components.
I'm thinking in any like this:
http://es.farnell.com/myrra/44306/transformer-16va-24v/dp/1689098
C) Get the 12V directly using A or B method with 12V and remove the LM7812.
What will be the best option for get more stable supply for items?.
For make the measurement really i don't know what option do.
A) ADC from teensy using voltage divisor for down to 3.3V
B) ADS1115 i2c using voltage divisor for down to 5V (i'm familiar with this)
C) INA125, 128 ...
The objetive is the better meassurements because i use for largue items (500 grs) but with small items like 20 grs too.
Any help will be apreciated.