Engineering Resources
Guides, reference tables and standards that pair with the calculators.
Resistor Color Code โ Complete Reference
Decode 4-, 5- and 6-band resistors with an IEC 60062 table, worked examples, TCR (ppm/K) explained, and a live interactive decoder + reverse calculator.
Read the guide โ ๐Standard Value Series (E6/E12/E24/E96)
Preferred value tables, the logarithmic math behind them, tolerance relationships and a nearest-preferred-value finder.
Read the guide โ ๐Schematic Symbols โ IEC & ANSI
A searchable library of 200+ component symbols with IEC & ANSI forms, designators and uses, plus a complete guide to reading schematics.
Read the guide โ ๐Unit Conversion Tables
Complete SI prefix table and the units behind every electrical quantity โ V, A, ฮฉ, S, W, J, F, H, Hz, Wb, T and more โ with an interactive converter, worked examples and the confusing-unit pitfalls explained.
Read the guide โ ๐Formula Sheet
A one-page master reference of essential electrical & electronics formulas โ DC, AC, power, resonance, transformers, decibels and more โ with worked examples, variable tables and copyable formulas.
New ยท Available ๐Datasheet Reading Guide
How to read a semiconductor datasheet and extract the specs that actually matter โ absolute max vs operating range, guaranteed vs typical, thermal and timing, packages and pins โ with an interactive selection workflow and a worked example.
New ยท AvailableResistor Color Code (excerpt)
Full interactive version in the Resistor Color Code guide.
| Color | Digit | Multiplier | Tolerance |
|---|---|---|---|
| Black | 0 | ร1 | โ |
| Brown | 1 | ร10 | ยฑ1% |
| Red | 2 | ร100 | ยฑ2% |
| Gold | โ | ร0.1 | ยฑ5% |
| Silver | โ | ร0.01 | ยฑ10% |