DIY LED and Continuity Tester
This DIY device by Pro Maker_101 tests continuity and a wide range of LEDs.
While you can find a wide range of electronics test devices for sale online, much of the time you only need to test continuity – whether two conductors are connected. In other situations, you may need to test that different types of LEDs work, likely requiring a range of voltage and current input values. As outlined here by Pro Maker_101, this two-in-one LED and continuity tester allows you to do either job in a compact DIY form factor.
The device is simple in its construction, featuring a USB-C socket for power input, an XL6009 voltage boost module, and a 0.28” voltmeter. This onboard voltmeter enables the user to set the output to the required 29V and shows different readings depending on the LED under test. A buzzer is implemented for easy continuity identification, and a toggle switch is used to set the device to either continuity or LED mode.
While continuity testing is provided with just about any modern multimeter, the LED function is rather interesting, given the wide range of LEDs that are illuminated in the latter part of the video below. The unit also includes a nice enclosure setup with a cut acrylic case and banana sockets for swapping continuity/LED probes. In either usage case, it’s a compact and useful tool, and a good example of what you can do with a bit of creative DIY work!
