Ultrasonic Sensor(HC‑SR04) Stand

This simple 3D‑printed stand holds a standard RCWL‑1601 (HC‑SR04‑compatible) ultrasonic distance sensor upright and stable on a desk.
I designed it for primary & middle‑school STEM lessons so students can:

plug jumper wires into the sensor without bending the pins

pick up and aim the sensor safely while testing distance readings

clearly see which transducer is “Trig” (L) and which is “Echo” (R)

The stand has a low centre of gravity and prints without supports.
For extra stability, fix the feet to the table with masking tape—cheap, removable, and classroom‑proof!

🧩 Assembly
Slide the sensor PCB into the upper cradle—press gently until the PCB is flush with the rear stop.
Route the four jumper wires downward through the slot.
Stick the base to the desk with two strips of masking tape (yellow in the photos).

Connect the wires to your microcontroller (e.g., micro:bit: VCC, Trig, Echo, GND).

That’s it—students can now measure distances by moving objects in front of the sensor and watching live values on the micro:bit or serial monitor.

🎒 Classroom tips
Pair work: one student holds an object, the other reads the distance—promotes collaboration.
Data logging: combine with the micro:bit Data‑logger extension to create real‑time graphs.
Sensor orientation: label the Trig and Echo sides with a marker so kids instantly know which way is “forward.”