Hi friends!
Here is a common problem for all the electrical engineering students who have interest in the field of robotics and are pretty much into it. You always want to know where the hurdles or obstacles are located in the path of the robot so that it may not be collided with it or you may get some observations about the location of the walls etc.
Here is a simple electronic project which describes the ultrasonic receiver circuit and its working. get a pair of ultrasonic transducers from market. these are pretty cheap and easily available. And get 2 Op amps 741. Circuit is very easy to understand as shown in the diagram. Initial stage couples the received signal from the receiver to op amp input. We assume here that the ultrasonic receiver receives a signal of 40 kHz reflected from an obstacle in the path of the robot. And this signal was generated from an ultrasonic transmitter of 40 KHZ. Now the first op-amp stage amplifies the received signal an the second stage compares the receive signal with a particular signal level. You can adjust this level by changing resistors values for the desired signal level. This reflects the distance of obstacle from which the ultrasonic wave is reflected. By attaching several comparators set at different signal levels you can find different range calculations.
Here is a common problem for all the electrical engineering students who have interest in the field of robotics and are pretty much into it. You always want to know where the hurdles or obstacles are located in the path of the robot so that it may not be collided with it or you may get some observations about the location of the walls etc.
Here is a simple electronic project which describes the ultrasonic receiver circuit and its working. get a pair of ultrasonic transducers from market. these are pretty cheap and easily available. And get 2 Op amps 741. Circuit is very easy to understand as shown in the diagram. Initial stage couples the received signal from the receiver to op amp input. We assume here that the ultrasonic receiver receives a signal of 40 kHz reflected from an obstacle in the path of the robot. And this signal was generated from an ultrasonic transmitter of 40 KHZ. Now the first op-amp stage amplifies the received signal an the second stage compares the receive signal with a particular signal level. You can adjust this level by changing resistors values for the desired signal level. This reflects the distance of obstacle from which the ultrasonic wave is reflected. By attaching several comparators set at different signal levels you can find different range calculations.
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