LED Power Dissipation Calculator: Heat, Watts and Efficiency
How much power is lost as heat in an LED circuit? Where does all that energy realy go? That’s the question that stumps beginners and … Read More
JSCalc
Parallel Resistance Calculator | Rtotal, Branch Current
This behavior of resistance through parallel circuits is unintuitive, but it’s what happens. Resistors wired in series combine linearly, just like chaining them together. Current … Read More
Series Resistance Calculator
A series connection is simply you placing components in line with each other. In this case, all of parts become a longer part, an extended … Read More
E96 Nearest Standard Resistor Calculator (1%)
But engineers make trade-offs. They often try to match whatever parts are actualy available with whatever the theory says they need. In your schematic there … Read More
E24 Nearest Standard Resistor Calculator
On paper, circuit equations is precise. You work them out, and maybe end up with 7420 ohms for a voltage divider. You might also get … Read More
E12 Nearest Standard Resistor Calculator
Your math likely gives you a resistance that’s nearly but never exacty right. Reality is a bit messy; component shelves dont hold clean numbers like … Read More
Series-Parallel Resistor Network Calculator
The reason most electronics projects fall apart: “I thought it was all in parallel! But actualy some of it’s in series…” In real life, few … Read More
Drywall Sheets Calculator: 4×8, 4×10, 4×12 Count
It’s annoying when you run out of drywall. So close! But then that final panel doesn’t fit and you have to go back to store. … Read More
Lean-To Roof Pitch Calculator (Shed Slope x:12)
The simplest structure is a lean-to roof, which is one plane up against a wall. It’s used for sheds and carports because it’s simple to … Read More
Christmas Countdown Calculator: Days Until Xmas
How many weeks until Christmas? That’s the question, and it makes us anxious. How many shopping weekends? How many paydays before the bills hit? A … Read More