Resistor Code Tool.
Read resistor bands, decode SMD markings and find nearby values.
A visual 4-, 5- and 6-band resistor reference with conversions in both directions, preferred E-series selection and SMD code support.
What's it all about?
Resistor Code Tool helps decode the colour bands on through-hole resistors or find an appropriate colour code for a target resistance.
It handles four, five and six bands, including tolerance and temperature coefficient where applicable. The interface places coloured rings onto a graphical resistor and explains what each ring represents.
A separate SMD section handles common three- and four-digit markings, R notation and EIA-96 codes. The value-to-colours mode also finds nearby values from preferred resistor series.
The puzzle behind the idea.
Make a tiny physical component easy to read on-screen while retaining the electrical meaning of each band and distinguishing approximation from exact matches.
How I'm building it.
I combined an illustrated resistor with dynamic SVG colour bands, validated code tables and bidirectional conversion logic.
My role
Independent interface design and web-tool development.
