555 Timer Calc

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About this app

🚀 The 555 Timer Integrated Circuit!
The ultimate professional tool for electronics engineers, students, and makers. Design, calculate, and simulate NE555 circuits with unparalleled precision and a stunning, intuitive interface.

✨ Main Features (Free):
🔄 Astable & Monostable Modes: Instant calculation of frequency, duty cycle, period, and time constants.
🎛️ Advanced PWM Design: Dedicated logic for Pulse Width Modulation control and signal optimization.
🎨 Resistor Color Code: Automatic visual rendering of 4-band resistor values for your build.
📊 Interactive Waveform: Real-time graph showing both Output signal and Capacitor charge/discharge curves.
📐 Reverse Design Assistant: Input your target frequency or time, and let the app suggest the best commercial component combinations — even using your own Junkbox of capacitors on hand.
📝 BOM Generator: Generate and share your Bill of Materials (BOM) in a single tap.
🔌 SPICE Netlist Export: Get a ready-to-simulate netlist for LTspice/ngspice.

🛠️ Professional Tech Stack:
Chip Library: Choose between NE555, NE556 (dual timer), LMC555, TLC555 and ICM7555 — each with real datasheet current curves, not generic estimates.
Commercial Standards: Snap component values to E12 or E24 standard resistor series.
Dynamic Schematic: A technical circuit diagram that updates live as you tune your values.
Technical Guide: Deep-dive into formulas, theoretical basis, a clear DIP-8 Pinout diagram, and advanced notes on capacitor ESR, decoupling and PWM filtering.

💎 Unlock 555TimerCalc Pro:
📈 Full Tolerance Analysis: worst-case corner analysis, Monte Carlo simulation, thermal drift and a sensitivity (tornado) ranking by component.
🌊 Worst-Case Envelope: see the fastest/slowest possible unit directly on the oscilloscope graph.
📄 PDF Export: a polished design report, ready to share with a client or your team.
💾 Unlimited Design History: save every configuration you've ever built.
🚫 Zero Ads: a completely clean experience.
One-time purchase. Yours forever, no subscription.

🌎 Available in English & Spanish.

Optimized for offline work and mobile-first productivity. Stop guessing your RC values and start engineering with confidence! ⚡
NE555 timer calculator & simulator: astable, monostable and PWM circuits
Updated on
Aug 9, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
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  • No data collected
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  • Data is encrypted in transit
  • Data can’t be deleted
Content rating
Everyone
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About the developer
TESLA YARIXA MUNGUIA ROMERO
tech.anto19@gmail.com
Metrópolis San Gabriel norte Q-6, polígono 5, casa 1 CP 1101 Apopa El Salvador

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