The MUX itself cannot handle the current, so it must be used to control some kind of switch.

okay, how do I determiner if the MUX can handle the current or not ?
thanks,

 

Ok, 50Hz...you can forget about the relays, just use four 8 channel low side load drivers and double up each channel.

Do you have any component reference, co I can read and understand what you are suggesting ?
Thanks,

 

Ok, my bad I saw IA as one amp.

What is an "IA"?

I use it for Instrument Amplificator,
Thanks

 

Also one could just have a basic MCU board with a simple display, the board would cycle the multiplexer and display each of the 16 voltages on the display, perhaps updating them at like 10Hz or whatever. The board's A/D converter would monitor the output from the bridge...

I will write a code on the computer side to acquire the data per serial port and organise that with an Arduino. That was my plan
Thanks,

 

It can be done, but the question is how much time, effort, and expense is the solution worth to you.

Haha, I see your point. I am 100% on it so it can work,

 

Ok, my bad I saw IA as one amp.

What is an "IA"?

Instrumentation Amplifier. Used for low level signals.

 

That MUX506 device seems to support a "channel current" of between -25 mA and +25mA, quite decent.

okay I will look into it thanks

 

The MUX on-resistance will need to be much less than the strain gauge resistance, to minimize error.
What is the gauge resistance?

You may have to use 16 bridges and just multiplex the input to the IA, which is a very high impedance.

 

Ok, sorry about the misinterpretation of "IA" just ignore the suggestions regarding the load drivers or relays.

Just use the triangle symbol, as not to confuse us old fogies.

 

The MUX on-resistance will need to be much less than the strain gauge resistance, to minimize error.
What is the gauge resistance?

You may have to use 16 bridges and just multiplex the input to the IA, which is a very high impedance.

The gauges have a resistance of 120 Ohm. I'm looking for a way to not use 16 bridges or 16 IA.

 

Ok, sorry about the misinterpretation of "IA" just ignore the suggestions regarding the load drivers or relays.

Just use the triangle symbol, as not to confuse us old fogies.

Okay, my bad I will more careful about symbols.

 

The gauges have a resistance of 120 Ohm. I'm looking for a way to not use 16 bridges or 16 IA.

I understand that.
So how much resistance can you tolerate in series with the strain gauge without affecting the needed accuracy?

 

I understand that.
So how much resistance can you tolerate in series with the strain gauge without affecting the needed accuracy?

Hey,
I'm flexible about that cause I can change the other resistors so they will take account of the value in series with the strain gauge,
You have a suggestion ??