Using an RCA integrated circuit, this instrumentation amplifier was found in a November 1970 Radio Electronics magazine. The instrument has a full scale of 100 uA.
We obtained this circuit from an old Argentine magazine. The circuit originally uses germanium...
We found this circuit in an old English publication. The sensor is a common LDR. and the...
This circuit is from an 80's component manual. The components are from the time, but the circuit...