LM358-N: Help designing cascading amplifiers: voltage subtractor outputting to a non-inverting amplifier - Amplifiers forum - Amplifiers - TI E2E support forums
Project: Pulse meter Idea: Use noninvasive infrared light to probe blood pressure and pulse rate in a finger tip. Uses: A variant of this device is used. - ppt download
LM358: Pin treatment of non used opamp - Amplifiers forum - Amplifiers - TI E2E support forums