JSCalc

Whether you’re a van lifer or just own a phone, it happens to all of us: you’ve got to go right now, but your phone … Read More

When an e-bike’s range evaporates on cold mornings or a drone battery swells mid-flight, that’s typically not bad luck. That’s battery trouble; specifically, a mismatch … Read More

Milliamps per hour are tiny, but they count when its time to face the desk at airport security. Airline regulations specifies batteries by watt-hours, just … Read More

When buying a battery, you see something like “100 amp hours” on the box. That’s half the story. It measures how much charge is in … Read More

So then what does the supercapacitor runtime calculator do? It help you answer the simple question: how long will this device last in my circuit … Read More

The capacitor voltage rating margin calculator give you confidence to know whether or not a cap is capable of handling its true working voltage. Just … Read More

You frequently see a small number etched onto those little ceramic caps. Often it’s something like 104, or maybe 223, or 471. They don’t normaly … Read More

Digital boards glitch or run clean when loaded. Depending on which decoupling capacitor you choose for them. When an FPGA or microcontroller changes state, it … Read More

An unregulated DC power supply performs according to its reservoir capacitor. Choose a bad one (too small) and you have ripple and sagging voltage rails. … Read More

The transformer is humming on the bench because you built a power supply. You soldered in a big old electrolytic capacitor from an old computer … Read More