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.
This circuit was found in a 1962 publication. At the time there were high voltage batteries like the...
The transistors in this circuit can be BD135 and BD136 for currents up to 500 mA. The circuit...
) This is the original application of the National Semiconductor LM3909 low consumption pulsator. The LED...