Doctronics Overview
Electronics helper is carefully designed to address the need for electronic engineers and electronics hobbyists in designing an electronic circuit.

The app contains the electronic components reference section, electronics circuit reference section, and electronics circuit calculation section.
Tedious electronic circuit calculation such as Butterworth, Sallen-Key, Chebychev, and Bessel filter is made easier with the app.

Features of Doctronics
Electronic components section:
Resistor
Capacitor
Inductor
Transient voltage suppressor(TVS)
Rectifier diode
Signal diode
Zener diode
Bipolar junction transistor(BJT)
Metal oxide field effect transistor(MOSFET)
555 timer
Operational amplifier (Op-amp)
Arduino boards (arduino uno and arduino nano)
Atmega 328
Voltage regulator integrated circuit(IC)
Multiplexers
Demultiplexers
Encoders
Decoders
Flip-flops
Counters
Shift registers
Electronics circuit section:
Class A amplifier circuit
Class B amplifier circuit
Class AB amplifier circuit
Relaxation oscillators circuit
Sinusoidal oscillators circuit
Resistor-Capacitor filter (RC filter) circuit
Inductor-Capacitor filter (LC filter)
Active rectifier circuit
Bridge rectifier circuit
and many more
Electronics calculator section:
NE555 timer Astable multivibrator
NE555 timer monostable multivibrator
Bipolar junction transistor (BJT) analysos
Inductor winding
Toroidal inductor winding
Transformer winding
Butterworth, Bessel, Chebychev passive filter calculator
Sallen Key active filter calculator
Inverting, noninverting and difference operational amplifier calculator
Resistor in series calculator
Resistor in parallel calculator
Capacitor in series calculator
Capacitor in parallel calculator
Capacitance of a capacitor calculator
Resistance calculator
Series LRC circuit impedance and reactance calculator
Parallel LRC circuit impedance and reactance
Charging and discharging a capacitor
Charging and discharging an inductor
Polyester film capacitor code
Ceramic capacitor code
Resistor color code
Air core inductor
Voltage divider
Current divider
Ohms law (current, voltage and resistance relation in a circuit)
Delta to star resistor network conversion
Star to delta resistor network conversion
Light emitting diode (LED) resistor calculator
Double pole Sallen Key
Butterworth filter components value calculator
Surface mounted (SMD) resistor code calculator
Pi, Tee and Bridge attenuator
Radio frequency(RF) calculator
Alternating current (AC) power
Direct current(DC) power

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Apk:
https://www.virustotal.com/gui/file/c8e0b9309479bd8188d615a62a78431b187672c4d17eb63713b1d127de797906/detection