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555 Calc vs Operational Amplifiers Guide Usage & Stats
This App calculates registors value, when designing the circuit using Timer IC 555.
How to
(1) Input Frequency value.
(2) Input Duty Ratio.
(3) Input C1 Value.
(4) Touch ‘Calculate’ button.
(5) Registors value will be displayed.
Note.
* Set Duty Ratio to 50 ~ 99.
* If you set Duty Ratio to 50, R1 value will be set to 0.
- Apple App Store
- Free
- Utilities
Store Rank
- -
Operational Amplifiers Guide is your essential tool for designing and analyzing circuits using op-amps and comparators. Whether you're a student, electronics enthusiast, or experienced engineer, this app helps you create, calculate, and understand a wide variety of op-amp–based circuits with ease.
Use it as a practical reference when developing projects, building prototypes, or studying amplifier configurations. The app also includes technical data on popular operational amplifier and comparator series — making it a handy guide for both design and selection.
Available in 11 Languages:
• English, French, German, Indonesian, Italian, Polish, Portuguese, Russian, Spanish, Turkish, and Ukrainian - study in your native language!
Key Features:
• Interactive calculators for common op-amp circuits
• Step-by-step explanations and formulas
• Reference info on op-amps and comparators
• Ideal for learning, prototyping, or quick checks
• Light and dark mode support
The application contains the following guides and calculators:
Amplifiers
• Non-inverting operational amplifier
• Inverting operational amplifier
• Inverting amplifier with T-bridge in OS
• Differential amplifier
• Differential amplifier with T-bridge in OS
• Voltage repeater
• Inverting voltage repeater
• AC voltage amplifier
• High Input Impedance AC Voltage Amplifier
• AC voltage repeater
ActiveFilters
• Non-inverting low-pass filter
• Inverting low-pass filter
• Non-inverting high-pass filter
• Inverting high pass filter
• Bandpass filter
• Gyrator
Integrators and differentiators
• Voltage integrator
• Sum integrator
• Integrator with signal amplification
• Difference integrator
• Double integrator
• Voltage differentiator
• Sum Differentiator
• Differentiator with T-bridge
• Differentiator with T-bridge made of capacitors
• Difference differentiator
Comparators
• Comparator
• Limiter
• Limiter with zener diode at the input
• RS trigger
Attenuators
• Non-inverting attenuator
• Inverting attenuator
Converters
• Voltage-to-current converter with non-inverting input
• Voltage to current converter with inverting input
• Voltage to current converter with differential input
Adders and substactors
• Inverting adder
• Addition-subtraction circuit
• Non-inverting adder
Logarithmic and exponential amplifiers
• Diode-based logarithmic amplifier
• Transistor-based logarithmic amplifier
• Diode exponential amplifier
• Exponential transistor amplifier
Sine Wave generators:
• Op-Amp Oscillators
• Oscillator with Diode in the Feedback Path
• Twin-T Network Signal Generator
Square-wave pulse generators
• Op-Amp Square-Wave Generator
• Adjustable Square-Wave Generator
• Enhanced Square-Wave Generator
• Duty-Cycle Adjustment
Triangle-wave signal generators
• Nonlinear Triangle-Wave Generator
• Variable-Symmetry Sawtooth Generator
• Linear Triangle-Wave Generator
• Adjustable Linear Triangle-Wave Generator
• Variable-Symmetry Ramp Generator
Popular operational amplifiers: description and pinout
Popular comparators: description and pinout
Download now and power up your electronics work!
- Apple App Store
- Free
- Utilities
Store Rank
- -
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February 21, 2026