RachelAnne289
Newbie level 5
Hello everyone, I am studying abroad and I am working on a speedometer project.
I am preparing to use an ultrasonic transmitter and receiver to make an ultrasonic sensor circuit, and then connect it with the single-chip microcomputer msp430 to realize the functions of speed measurement and numerical display.
I am temporarily in charge of the hardware module.
I don't know much about circuit diagrams, and I have many questions to ask.
1. I chose a 40Khz ultrasonic transmitter and receiver. Does the circuit I need to generate a frequency of 40Khz? Can this step be achieved by MSP430?
2. What circuit do I need to make between the transmitter and receiver? What function?
3. I found this circuit design on the Internet, but it is for a 25Khz sensor. Can I use it?
4. What are the values of resistors and capacitors based on?
I am preparing to use an ultrasonic transmitter and receiver to make an ultrasonic sensor circuit, and then connect it with the single-chip microcomputer msp430 to realize the functions of speed measurement and numerical display.
I am temporarily in charge of the hardware module.
I don't know much about circuit diagrams, and I have many questions to ask.
1. I chose a 40Khz ultrasonic transmitter and receiver. Does the circuit I need to generate a frequency of 40Khz? Can this step be achieved by MSP430?
2. What circuit do I need to make between the transmitter and receiver? What function?
3. I found this circuit design on the Internet, but it is for a 25Khz sensor. Can I use it?
4. What are the values of resistors and capacitors based on?