CodeProven Bench Suite · Interactive Calculators · Developer Tools

Bench Sidekick & Engineering Tools

Interactive hardware design calculators, 5V-to-3.3V logic level shifters, battery autonomy estimators, and the Bench Rule Measurement Logbook. Measure before you trust it.

1. 5V to 3.3V Voltage Divider Calculator

Safe ESP32 & RP2040 GPIO Logic Interfacing

Input Voltage (V_in)

Upper Resistor R1 (Ohms)

Lower Resistor R2 (Ohms)

Quick presets: 10kΩ + 20kΩ (3.33V) 1.8kΩ + 3.3kΩ (3.24V) 4.7kΩ + 10kΩ (3.40V)

Calculated Output Voltage (V_out)

3.33 V

Safe for 3.3V GPIO (< 3.35V)

Divider current: 0.17 mA · Quiescent loss: 0.83 mW

2. LED Current Limiting Resistor Calculator

Prevent Burnout · Precision Ohm Values

Supply Voltage (V_s)

LED Color / Forward Voltage (V_f)

Forward Voltage V_f (Volts)

Desired Forward Current I_f (mA)

Required Resistor (R = [Vs - Vf] / If)

193 Ω

Nearest Standard (E24): 200 Ω or 220 Ω

Power dissipation: 43.5 mW (Standard 1/4W resistor safe)

3. IoT & ESP32 Battery Life Autonomy Estimator

Deep-Sleep Cycle Calculations

Battery Capacity (mAh)

Active Run Current (mA)

Active Duration per Wake (seconds)

Deep-Sleep Current (micro-amps µA)

Wake Interval (minutes)

Estimated Battery Autonomy

428 Days

Approximately 14.2 Months (~1.2 Years)

Average continuous current: 0.24 mA

4. The Bench Rule · Live Measurement Log

"Measure before you trust it. Write down what you measured."

Record real pin voltages and sensor signals from your multimeter before applying power to sensitive microcontrollers. Measurements persist automatically in your browser's local storage.

Test Point / Pin	Target / Expected	Measured Value	Status	Bench Notes

Creator & Android Utilities

Android App · v1.0.0

YT TUBE

249 KB · Android 8.0+ · Open Source

An Android YouTube client that permanently eliminates Shorts shelves, hides the bottom Shorts tab, and redirects Shorts URLs into the standard video player.

Download APK (249 KB) App Guide Terms

Android App · v1.0.0

Auto Cap A

2.4 MB · Android 8.0+ · Free

AI-driven video subtitle studio tailored for Indian creators. Generates kinetic animated subtitles strictly formatted in conversational Roman Hinglish.

Download APK (2.4 MB) App Guide Web Studio