Precision Tools for
Advanced Circuits.
The specialized workspace for electronic engineers, PCB designers, and professional makers.
Popular Calculators
Parallel & Series Resistor Calculator
Total equivalent R — series, parallel & mixed networks
dBm to Watts Converter
50 dBm = 100 W — full RF power conversion table
Capacitor Discharge Calculator
RC bleeder sizing & safe discharge time
Resistor Color Code Values Hub
Pick by task: LED, I²C, dividers, megohm — 8 unique guides
How to Read Resistor Color Code
Chart, mnemonic & step-by-step walkthrough
Resistor Color Code Calculator
Tap band colors — instant ohms & tolerance
Streamlined Workflows
Streamlined calculation modules designed for rapid hardware prototyping and verification.
Essential Tools
Core calculators for everyday circuit, power, and PCB tasks.
Browse all toolsParallel & Series Resistor Calculator
Total equivalent R — series, parallel & mixed networks
dBm to Watts Converter
50 dBm = 100 W — full RF power conversion table
Capacitor Discharge Calculator
RC bleeder sizing & safe discharge time
Resistor Color Code Calculator
Tap band colors — instant ohms & tolerance
Engineering Insights
100 Ohm Resistor Color Code — Brown Black Brown Gold
100 ohm resistor color code is Brown-Black-Brown-Gold (10×10). 4/5-band charts, RC timing tables, and wattage on 5–12 V rails.
100k Ohm Resistor Color Code — High-Z Biasing & Divider Top Leg
100 kΩ color code (Brown-Black-Yellow-Gold): high-impedance bias networks, 10 kΩ partner dividers, yellow vs orange vs green multiplier trap, and megohm-range DMM tips.