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LED-Vorwiderstand-Rechner — Kostenloses Online-Tool

Strombegrenzungswiderstand für jede LED berechnen

LED-Vorwiderstand berechnen. Eingangsspannung, LED-Durchlassspannung und Strom eingeben. Standardwerte werden angezeigt. Ohne Anmeldung.

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LED resistor calculator

Calculate series current-limiting resistor for any LED.

How to use this tool

  1. 1

    Enter source voltage

    Battery or power supply voltage.

  2. 2

    Enter LED specs

    Forward voltage (Vf) and current (If) from datasheet.

  3. 3

    See resistor

    Exact + standard value, power rating.

Frequently Asked Questions

LED forward voltage typical
Red: 1.8-2.2V. Yellow/Green: 2.0-2.3V. Blue/White: 3.0-3.5V. UV: 3.3-4.0V. Always check datasheet.
Formula
R = (V_source - V_led) / I_led. Use LED current typically 10-20 mA. Power dissipation = (V_source - V_led) × I.

Wichtigste Punkte

  • LED Resistor Rechner is a free, browser-based calculator tool — current-limiting resistor for any led.
  • Nein signup, no downloads, no file uploads. Tools run in your browser; the few that need an outside service say so on the page.
  • Works on desktop, tablet, and mobile. Install as a PWA for offline access.

How to Use LED Resistor Rechner

  1. Open the tool: Launch LED Resistor Rechner on Toololis — no account or download needed.
  2. Enter your data: Paste text, enter values, or select a file directly in your browser.
  3. Get instant results: Everything is processed locally — results appear immediately.
  4. Copy or download: Save your output or share it. Bookmark for quick access next time.

LED Resistor Rechner — Quick Facts

Preis
Kostenlos — keine Limits, kein Wasserzeichen, keine Paywall
Privatsphäre
Wird im Browser verarbeitet. Tools, die einen externen Dienst brauchen, sagen das auf der Seite. Seitenaufrufe werden gezählt (Google Analytics).
Plattform
Jeder moderne Browser — Desktop, Tablet, Mobil
Kategorie
Rechner Tools on Toololis
Offline
Works offline after first visit (Progressive Web App)
MerkmalDetails
ToolLED Resistor Rechner
KategorieRechner
Anmeldung nötigNein
Datei-UploadKeine — wird im Browser verarbeitet
Mobile-UnterstützungVoll responsive
KostenFür immer kostenlos

Why Use LED Resistor Rechner?

You should try LED Resistor Rechner for a quick, private way to current-limiting resistor for any led. Processing happens in your browser and files are never uploaded; the few tools that need an outside service say so on the page.

On the other hand, dedicated APIs or desktop tools suit batch processing better. They also handle server-side automation. For everyday tasks, browser tools offer the best speed, privacy, and convenience.

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100% Privatsphäre. Dieses Tool läuft komplett in deinem Browser. Deine Daten werden niemals auf einen Server hochgeladen.