Differential Amplifier

Started by unknown · date unknown · 2 posts

1. electrotek

   #1 · date not recorded

   Here's a good starting article about using op amps to make a differential amplifier:
   
   http://www.electronics-tutorials.ws/opamp/opamp_5.html
   
   This type of circuit is used by musicians in the form of an audio mixer. When used to compare voltages, hv's will have to be reduced by a pair of precision voltage divider resistors.  These are a couple of bucks each:
   
   http://www.goldmine-elec-products.com/prodinfo.asp?number=G17753
   
   I'll do some checking and see if I can find a specific circuit.  But it's also possible to buy a basic, upgradable differential amplifier for $15:
   
   http://www.robotmesh.com/grove-differential-amplifier?gclid=Cj0KEQjwx_WuBRDJ7tSK2-W0pJkBEiQAEWgR8NXyiWgwd5jv8D7n-B_bDJNZ-9XjFhrLEYQrqeitnHkaAlh08P8HAQ
   
   

2. sebosfato

   #2 · 27 Aug 2015

   I Will have a good look at it man thanks a lot! hope i can find this pieces... seems better to use as voltage dividers
   
   normaly to buy things from abroad here it take too much time...