NVR Channel Count vs. Actual Recording Resolution — What the Box Doesn’t Tell You
by Dana Reyes
An 8-channel NVR has eight ports. Plug in eight 4K cameras, and every one of them records at…
Electronics
Flicker-Free Means Two Different Things — One Matters for Your Camera
by Dana Reyes
Every LED light sold for video says flicker-free somewhere in the copy. The phrase means the light pulses…
The Always-On Display Is What’s Eating Your Smartwatch Battery
by Dana Reyes
A smartwatch advertising 50-day battery life and another advertising 15 days can die on the same afternoon if…
Your USB-C Charger’s Wattage Number Is Lying to You
by Dana Reyes
A 140W USB-C charger plugged into two devices doesn’t give each one 70W. It negotiates — and the…
Wireless Security Sensors Drop Alerts When Your Wi-Fi Gets Busy
by Dana Reyes
Your door sensor fired. The reed switch opened, the transmitter sent its packet, and nothing happened — no…
Metal Laptop Stands Don’t Cool the Way You Think They Do
by Dana Reyes
Aluminum conducts heat roughly 800 times better than ABS plastic. That number is real, sourced from materials engineering…
LEDs Don’t Burn Out. They Fade.
by Dana Reyes
A traditional projector bulb doesn’t warn you. One evening the image looks washed out, and the next week…
Digital Signage Brightness and Resolution: Why Your Outdoor Display Looks Washed Out
by Dana Reyes
A 2,000-nit display and a 500-nit display look identical indoors. Move them both outside on a July afternoon…
Open-Ear Headphones Leak Sound. Here’s How Much and Why.
by Dana Reyes
Open-ear headphones don’t seal your ear canal, which means the sound goes two directions: toward your eardrum and…
Earbud Drivers Don’t All Move Air the Same Way
by Dana Reyes
A 6mm earbud driver and a 13mm driver playing the same 60 Hz bass note need to move…