Handheld Ultrasonic Rangefinder

Appendix B: Schematics/pictures

Power circuit

Power circuit

Receiver circuit

Receiver circuit

Transmitter circuit

Transmitter circuit

LCD circuit

LCD circuit

Programming port

Programming port

MCU circuit

Programming port

Testing the software

Testing the software

Close-up of the Tx and Rx circuits

Close-up of the Tx and Rx circuits

Close-up of the MCU and LCD

Close-up of the MCU and LCD

Testing the hardware

Testing the hardware

Sample input and output

Sample input and output

Mode menu

Mode menu

Sample distance and speed measurement

Sample distance and speed measurement

User selectable measurements

User selectable measurements

Calibration mode

Calibration mode

The final product

The final product