Question

design a smoke detector circuit using open loop voltage detector op amp​

Answer 1

Answer:

The original smoke alarm circuit electroschematics.com/5450/smart-smoke-sensor-alarm/ has some problems and has left some hobbyists and students disappointed. Rather than to attempt to solve its many problems, I have created an update that uses the venerable LM741 op amp. It is simpler, more conventional, easier to understand and has much better battery life