im trying to run my water flow circuit diagram at circuitlogixpro, but it doesn't work, can somebody gave an alternative water flow circuit diagram using ua741? thanks.
good day sir,the sensor were using is a piezoelectric transducer. we choose ua741 opamps because its an all purpose op amp at the same time it is the alternative for our first choice lm613 which is not available here in our place. thanks and God Bless.
The schematic is illegible. However, the uA741 has noise issues, and very limited bandwidth. Since you are using a transducer, you'll be working with frequencies the 741 cannot process.
The 741 doesn't provide gain past 20kHz or so, in addition to the noise it adds.
Here is the 741 output swing vs. frequency, notice the sharp drop past 10kHz (With a ±15V Supply it can only output a 12V swing, which gets worse as frequency increases):
For comparison, A TL071 op amp, one of MANY other options (at same or lower price) than a 741, Notice the flat response well past the frequencies you'll be using:
good day sir, thank you so much for your reply, we would like to ask if this TL071 op amp is a good op amp for water flow sensor? we are trying to detect the flow rate of water flowing( creek water).
good day sir, we are using a piezoelectric transducer for our water flow sensor. are we going to use tl071 op amps? or do you have any suggested op amps sir?
I don't know what frequency you plan to use. Free air ultrasonic transducers operate around 40kHz, I don't know what frequency your transducer will be using.
Do you have a block diagram or full schematic of how the system will operate? Flow sensing via ultrasonic is not a simple and easy task, a fast microcontroller is usually involved to interpret timing and display the output. I've honestly never seen a flow meter measure a non-confined flow, such as a stream. Only flow meters that connect to pipes that have water moving in them.