OP Amp parator Circuit Working and Its Applications Op Amps can often be used as voltage comparators if a diode or transistor is added to the amplifier’s output) but the real comparator is designed to have a faster switching time comparing to the multipurpose Op Amps. Introducing Easy Pulse: A DIY photoplethysmographic sensor ... have built the easy pulse heart rate monitor . i change some value of capacitor and resistor before the led start blinking and i change the sensor also. in the circuit. the i c I use is lm342. since I don’t have access to microcontroller to count the pulse in my country I have to manipulate clock to count the pulse and 555 timer ic to time the clock to stop counting for every 1 minute to get ...

of an lm358 operational amplifier recognize some amplifiers Gallery


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