These days there a large number of sensors and analog circuits that ... I connect a sensor used in digital scales (known as a load cell) to the instrumentation amplifier and measure the output ...

You can design a precision, high-side current-sense amplifier to monitor inductive load currents over a wide range of input common-mode voltages. The circuit is suitable for ... a steering sensor ...

In order to help his friend prepare for a talk at DEFCON this weekend, [Craig] built an IR photodiode amplifier circuit ... the IR emitter in the proximity sensor were running all the time ...