Resistor Colour Code Calculator
Click colour bands to read resistance values, or enter a value to see the matching bands. Supports 4, 5, and 6-band resistors with tolerance.
Your tools stop working when the Wi-Fi does
The Maker's Knife is the answer
Field work. Remote locations. Unreliable connections. Air-gapped environments. Cloud tools become expensive paperweights. Every tool works offline, forever. Open the HTML file, do your work. No login, no sync, no server required.
The Maker's Knife is a single-file knife with 6 tools that runs entirely in your browser. The Maker's Knife gives electronics enthusiasts, students, and professionals a portable reference bench that works anywhere. Read resistor color codes, calculate Ohm's law relationships, simulate logic gates with truth tables, compute PWM parameters, look up I²C addresses, and watch time in binary — all from a single HTML file on any device.
WHAT'S INSIDE
6 tools in a single HTML file
Ohm's Law Calculator
Enter any two of voltage, current, resistance, and power — the other two are calculated instantly with unit scaling.
Logic Gate Simulator
Build logic circuits from AND, OR, NOT, NAND, NOR, XOR, and XNOR gates. Toggle inputs and watch outputs propagate with truth tables.
PWM Calculator
Compute duty cycle, frequency, period, and on/off times for PWM signals. Useful for servo control, LED dimming, and motor speed.
HOW IT WORKS
Three steps. No setup.
1
Download the file
Purchase The Maker's Knife and download a single HTML file. No installer, no account, no setup.
2
Open in any browser
Double-click to open in Chrome, Firefox, Safari, or Edge. Works on any operating system.
3
Start working
Your data stays in your browser's local storage. Nothing is uploaded. Ever.
COMPLIANCE & GEOGRAPHY
Global
Works in any country. No server dependency, no regional restrictions.
FAQ
Frequently Asked Questions
How does The Maker's Knife solve the working without internet problem?
The Maker's Knife runs entirely in your browser. Field work. Remote locations. Unreliable connections. Air-gapped environments. Cloud tools become expensive paperweights. Every tool works offline, forever. Open the HTML file, do your work. No login, no sync, no server required. Resistor color codes, Ohm's law, logic gate simulator, PWM calculator, I²C reference, and a binary clock. Your electronics bench in a file.
Is my data safe with The Maker's Knife?
Yes. The Maker's Knife is a single HTML file. It never connects to any server. Your data stays in your browser's local storage on your device.
What makes The Maker's Knife different from cloud tools?
Cloud tools require internet, charge subscriptions, and store your data externally. The Maker's Knife is a one-time purchase ($39), works offline, and never transmits data.
Is The Maker's Knife really just one file?
Yes. The Maker's Knife is a single HTML file containing 6 tools. Download it, open it in any browser, and start working. No installation, no dependencies, no accounts.
No cloud One fileOne-time purchase
Get The Maker's Knife — $39Sovereignty as a Service