my load cell has 4 wires 2 for power supply and 2 for output. i want to amplify the out put signal and interface to pic micro adc. how to do this in ic 741, dual supply is needed are single is enough. kindly post the circuit in op amp 741.
I think you need to use an Instrumentation amplifier for better operation(in case you don't know you can find some info here https://en.wikipedia.org/wiki/Instrumentation_amplifier ),so in case you need a single supply or/and cheaper INA you can either build a one using 3 op amps or look for a one like AD8223 ,AD623, MAX4194 .... etc