Operation Amplifier 741 Based Projects

The op-amp IC 741 is a DC-coupled, high gain differential amplifier with external negative feedback. IC 741 is characterized by almost infinite open loop gain (100,000), almost infinite input impedance (2MΩ) and almost zero output impedance (75Ω).

IC 741 is most popular, cheap and easy to use op-amp. Some popular IC 741 name MCI741, LM741, SN72741, CA741, GS741 etc.

IC741 can be used as electronic integrator or differentiator, depending on the R-C network in the input and feedback circuit.

Application of Operational amplifier:-

The following lists of circuits functions is designed using op-amp:

Voltage follower, current to voltage converter, summing amplifier, integrator, differentiator, active filter, capacitance multiplier, simulated inductor, voltage to current converter, precision rectifier, analog to digital converter, sample and hold circuit, voltage comparator, servo amplifier.

Electronics projects Based on operational amplifier 741 IC posted in www.bestengineeringprojects.com


  1. A Variable Audio Frequency Oscillator Using Op-amp 741
  2. Adjustable Ripple-Regulated Power Supply Using 741
  3. Bass Booster Using Op-amp 741
  4. Four Channel Audio Mixture
  5. Automatic Light Operated Switch Using LDR and 741
  6. Battery Voltage State Indicator using 741
  7. DC Volt Polarity Indicator Using IC 741
  8. DIY Headphone Amplifier
  9. Electronic Room Thermometer Using Op-amp 741
  10. Electronic Thermometer Circuit
  11. High/Low Voltage Cut-out Using Op-Amp 741
  12. Listening Bug Using op-amp 741
  13. Microphone Amplifier Using Op-amp 741
  14. Operational Amplifier 741 Tester
  15. Sound Operated Intruder Alarm with Flash
  16. Sort Circuit Protected Regulated Power Supply Using 741
  17. Temperature Deviation Indicator Using 741
  18. Thermal Touch Switch Using Op-amp 741
  19. Tone Control for Guitar Amplifier Using 741
  20. Voltage into Frequency Converter
  21. Wind Sound Generator Using IC 741
  22. Sound detector circuit using op-amp 741
  23. Electronic Fuse using OP-amp 741