Laser Probe to teach sonographie

In addition to the three components produced via 3D printing (probe, cover, and position holder), we obtained a 22 mm switch, three CR2032 button-cell batteries, and a line laser (model 70105094; type LFL650-5-12(9×20)60; 650 nm; 5 mW; laser class 1; Picotronic GmbH, Koblenz, Germany).
To prepare the wiring, the red lead was divided into two segments. One segment linked the switch to the battery, while the other connected the laser module to the power source. The black lead was routed directly to the switch. After inserting the batteries, the laser line module could be positioned and held in place using adhesive tape.