Electronic Circuits Calculator 4+‎

The app is an excellent reference for electronic engineers. It will be useful for both beginners and experienced electronics hobbists. The app contains more than 120 manuals and calculators for various areas of electronics, and also includes a full-text search function.
This program contains the following calculators and guides:

Basic calculators
-Ohm's law
-Power, voltage and current
-Resistive voltage divider
-Wheatstone Bridge
-RC circuit time constant
-Battery life
-Additional resistor for voltmeter
-Shunt resistor for ammeter.

Resistors
-Resistor color codes
-SMD resistor codes
-EIA-96 encoding
-Selection of standard resistor values
-Series connection of resistors
-Parallel connection of resistors
-E-series

Capacitors
-Ceramic disc capacitor codes
-Film capacitor codes
-Capacitor operating voltage codes
-Color codes of film capacitors
-SMD capacitor codes
-Series connection of capacitors
-Parallel connection of capacitors

Inductors
-Inductor color codes
-SMD inductor codes
-Parallel connection of inductors

Diodes
-Diodes
-Rectifier diodes
-Signal diodes
-Schottky diodes
-Tunnel diodes
-Varicaps
-Zener diodes

Transistors
-Bipolar transistors
-MOSFETs
-JFET transistors
-Unijunction transistors
-Bipolar transistors with insulated gate.
-Darlington transistor pair

Thyristors
-Thyristors
-Lockable thyristors
-IGCT thyristors
-MOS-controlled thyristors

Power supplies
-AC parameters
-Half-wave rectifier
-Full-wave rectifier
-Bridge rectifier
-Quenching capacitor
-Internal resistance of the power supply
-Symmetrical voltage doubling rectifier circuit
-Three-phase half-wave rectifier
-Three-phase bridge rectifier
-Voltage multiplier

Voltage and current regulators
-Voltage regulator on LM317
-Bipolar voltage regulator for LM317 and LM337
-Current source on LM317
-Zener diode reference voltage source
-Temperature compensated reference voltage source
-TL431 regulator
-TL431 regulator with additional transistor

Light Emitting Diodes
-Resistor for one LED
-Resistor for serial connection of LEDs
-Resistor for parallel connection of LEDs
-7 segment LED display
-Decoder for 7-segment displays CD4511

Photocells
-Photodiodes
-Photoresistors
-Phototransistors
-Optocouplers

Operational amplifiers
-Gain of non-inverting op-amp
-Gain of inverting op-amp
-Inverting op-amp with T-bridge in feedback.
-Inverting summing op-amp
-Differential op-amp
-Voltage integrator
-Voltage differentiator
-Voltage comparator

High frequency circuits
-Capacitor reactance
-Inductor reactance
-Convert gain to decibels
-Convert dBm to watts
-T-Attenuator
-Pi attenuator
-L-Attenuator
-Bridge T-attenuator
-Capacitive AC voltage divider
-Inductive voltage divider
-Frequency and wavelengths

Filters
-RC low-pass filter
-RC high-pass filter
-RC bandpass filter
-RL low-pass filter
-RL high-pass filter
-LC low-pass filter
-LC high-pass filter

Multivibrators
-Self-oscillating Multivibrator
-Monostable multivibrator
-Bistable multivibrator
-Multivibrator with diodes

555 Timer
-Astable mode
-Monostable mode
-Bistable mode
-Schmitt trigger
-Connecting LEDs
-Light detector
-Relay control

Logics
-AND logic gate
-OR logic gate
-NOT logic gate
-NAND logic gate
-NOR logic gate
-XOR logic gate
-XNOR logic gate,
-Combination circuits
-Transistor-transistor logic
-Complementary metal-oxide-semiconductor
-Open Collector TTL Logic Gates

The content of the application is updated and supplemented with the release of each new version.