This great sonar ranger from Devantech offers a wide range from 3cm to 3m. For further range see the SRF08. The SRF04 is interfaced using the one output line to ping the sensor and an input line to read the echo.
This is the SRF05 Ultrasonic ranger made by Devantech. The Ultrasonic detector can detect from ~4 inches to ~13 feet.
The MaxBotix low voltage MB1010 LV-MaxSonar-EZ1 offers very short to long-range detection and ranging, in an incredibly small package with ultra low power consumption. The MaxSonar-EZ1 detects objects from 0" to 254".
Out of the box, the SyRen 25 motor driver can supply a single DC brushed motor with up to 25A continuously. Peak currents of 45A are achievable for a few seconds. Made by Dimension Engineering.
Used for testing: TFMINI Micro LiDAR Module, connectors have been changed for testing.