I have found this circuit of a millivoltmeter, and it seems like something which as a hobbyist I can do it, and the range of the measurement is very suiting one of my projects, but I would like to attach it to arduino interfaced precise 24 bit ADC, so my question is  :

• How to replace the ampermeter with a voltmeter in order to interface an ADC  ?
• Is there some better replacement of the IC LF351 in the same circuit  ?
• What diodes I shall use as the best option  ?

I have found this circuit of a millivoltmeter, and it seems like something which as a hobbyist I can do it, and the range of the measurement is very suiting one of my projects, but I would like to attach it to an Arduino interfaced precise 24 bit ADC, so my question is:

• How to replace the ammeter with a voltmeter in order to interface an ADC?
• Is there some better replacement of the IC LF351 in the same circuit?
• What diodes I shall use as the best option?

I have found this circuit of a millivoltmeter, and it seems like something which as a hobbyist I can do it, and the range of the measurement is very suiting one of my projects, but I would like to attach it to arduino interfaced precise 24 bit ADC, so my question is :

• How to replace the ampermeter with a voltmeter in order to interface an ADC ?
• Is there some better replacement of the IC LF351 in the same circuit ?

I have found this circuit of a millivoltmeter, and it seems like something which as a hobbyist I can do it, and the range of the measurement is very suiting one of my projects, but I would like to attach it to arduino interfaced precise 24 bit ADC, so my question is :

• How to replace the ampermeter with a voltmeter in order to interface an ADC ?
• Is there some better replacement of the IC LF351 in the same circuit ?
• What diodes I shall use as the best option ?