Led and Zener Diode Tester

January 3, 2026 3D Printing object

Description

This device displays the forward voltage of an LED or Zener diode. Assembly is straightforward—use the included wiring diagram for reference.

Safety Warning:
Li-Po batteries can be hazardous if mishandled. Always use a proper charger board, observe correct polarity, and never short-circuit, overcharge, or leave the battery charging unattended. Discontinue use if the battery becomes hot, swollen, or damaged.

IF YOU ARE NOT FAMILIAR WITH HANDLING LI-PO BATTERIES, SEEK ADVICE FROM A KNOWLEDGEABLE TECHNICIAN. IMPROPER USE CAN CAUSE FIRE OR INJURY.

Components required:

2 × M2 × 5 mm hex cap screws
1 four-digit voltmeter with isolated 3-wire power supply
1 boost converter (XL6009)
1 Li-Po charger board
1 × 10 kilo-ohms resistor (1/2 W)
1 Li-Po battery (~600 mAh)
1 tactile switch (12 × 12 mm, 5 mm button height)
2 alligator clips (red for +, black for –)
Assorted wires (red and black recommended)
Heat-shrink tubing
Glue (hot glue recommended)

Set the boost converter output to approximately 30 V. Include a strain relief for the probes, such as a knot in the wire. Glue the battery in the back of the Electronic Layer.

Support material is not required. An infill of 20% is recommended.

This object was designed using Solid Edge Community Edition.

Files

	FrontCaseWithText.3mf
	FrontCase.stl
	BackCover.stl
	ElectronicLayer.stl

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The source files are available

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