Power

Tech 19 Sep 2026 5 min read

The Same 100 Ohm Resistor Behaves Differently at 3 V and 5 V

A 100 Ω resistor is still a 100 Ω resistor whether it is connected to 3 V or 5 V, provided it remains within its specified operating conditions. What changes is not the nominal resistance but the electrical state around it: current, voltage drop, and power dissipation. That distinction matters because a resistor does not generate an output voltage on its own. Its voltage and current are determined by the surrounding circuit.

Electronics Resistor

Tech 13 Sep 2026 6 min read

Sleep and Hibernation Handle Memory Differently

Closing a laptop lid can make the screen go dark almost at once, yet the next lid opening may restore every window in seconds. A computer can produce a similar result after hibernation, even though the underlying state is quite different. Both modes preserve an open session, but they do not preserve it in the same place or with the same dependence on electrical power. The distinction matters most when a computer stays unused for a long period, its battery becomes depleted, or resume time matters. It also explains how a machine can appear to continue from the same desktop after spending hours with little or no active power draw.

Computers Power

Tech 11 Sep 2026 7 min read

How USB-C Chargers Negotiate Power

A 100-watt USB-C charger does not normally push 100 watts into every device connected to it. A phone may take far less, while a laptop can request much more. The number printed on the charger describes what it can provide under supported conditions, not a fixed amount that every connected device must accept. That distinction makes USB-C charging easier to reason about. The charger, device, cable, and supported charging method all take part in determining the usable power. Once those pieces are separated, common questions about oversized chargers, slow charging, and cable choice become much clearer.

USB-C Charging