Editor's Note: We have strived to maintain accessibility in our Bring Science Home activities by limiting the required technology. We recognize technology is now more widely available than it was when ...

Measuring equipment such as SPL (Sound Pressure Level) decibel meters may seem daunting, but this article by [Shawon M. Shahryiar] shows that making your own need only have two essential ingredients: ...

DATEL DMS-30DR series 3½-digit panel meters provide LED displays that are readable in direct sunlight without special filters or shading. The 2.17 x 0.92 x 0.56-in. meter is autodimming as well as ...