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