Tools · the full bench

All tools

Every Circflow instrument in one place — search by name or filter by category. 68 tools, all running in your browser. New here? Start at the learning path.

Find your tool · grab what you need

Whatever you need, open it and go

Pick from five tool categories, or jump straight there with the search box — LED, capacitor, binary, pinout, it's all here. Want to learn digital electronics systematically? Check out the two guided tracks.

PinoutsFeatured

8/8

IC Pinout Series · part pinout reference ★ →
Raspberry Pi GPIO Pinout →
USB Connector Pinout →
Ethernet RJ45 Wiring (T568A/B) →
Arduino Uno Pinout →
Arduino Nano Pinout →
Raspberry Pi Pico Pinout (RP2040) →
ESP32 GPIO Pinout & Functions →
JTAG / SWD Connector Pinout →

DEC

Decoders

8/8

Resistor Color Code Decoder →
Inductor Color Code Calculator →
Fuse Code Reference →
SMD Resistor Code Calculator →
Capacitor Code Calculator →
Nearest E-Series Value Finder →
IP Rating Decoder (IEC 60529) →
Component Date Code Decoder →

REF

Standards

11/11

PCB Manufacturability Class Checker →
IC Parameter Comparison →
Component Cross-Reference Finder →
SMD Package Size Chart →
SI Prefix / Unit Converter →
AWG Wire Gauge Reference →
Logic Level Voltage Reference →
Electronic Symbols Reference →
Ethernet Cable Categories (Cat5e–Cat8) →
USB Versions & Speeds Reference →
E-Series Standard Values (E6–E96) →

All tools

Whatever you need, open it and go

PinoutsFeatured

Decoders

Standards

Calculators

Digital