Low-Cost-Meter

3 года назад

The video compares a low-cost CO2 meter bought on AliExpress to a more expensive, accurate model. The reviewer finds the cheaper meter to be wildly inaccurate, showing readings that fluctuate drastically and don't reflect the actual CO2 levels in the room. They are disappointed with the device's performance and plan to return it.

8 лет назад

This video shows how to convert a cheap 20-meter antenna into a 10-meter antenna. The creator demonstrates the process of modifying the antenna and then tests its performance using an SWR meter and an analyzer. The video highlights the potential for experimentation and creativity in ham radio.

6 лет назад

This video demonstrates a low-cost device that can detect electric fields and electromagnetic radiation. The device is easy to use and can be used to identify live AC wiring, trace the path of wiring within walls, and measure the strength of electric fields in various locations. The video includes demonstrations of the device's capabilities and provides tips for using it to assess potential exposure to electromagnetic fields.