Is it possible to connect two load cells? Either to a single NAU7802 unit or by daisy chaining two NAU7802? I need the total weight.
Thanks!
It is possible to connect 2 load cells to the NAU7802. See the hookup guide for details on how to do that. Sadly, we don’t have any example code that shows how to read both load cells so you’d need to figure that out on your own.
You could use two NAU7802’s but since they have a fixed I2C address, you can’t daisy chain them. You’d either need a microcontroller with 2 separate I2C busses, OR you could use a multiplexer to switch one bus between the two NAU7802’s. (The key here is you can’t have both on the same bus at the same time.)
orionv:
I need the total weight.
Depending on the project, you might be able to wire the two load cells in parallel and get the total. The cells need to be the same type and mounted properly. A good example is a load cell on either side of a hanging axle like for, say, a spool of cable or coil of metal.