Interactive Simulators
HelpBro Engineering Tools
Modular, code-driven calculators designed to help technicians analyze circuitry, calculate components, and generate invoices on the fly.
Comparator Simulator
Visualize input voltages, reference thresholds, and digital logic outputs with interactive waveforms.
OP-AMP Simulator
Inverting, non-inverting, and differential amplifier gain configurations with resistor selection.
PCB Interactive Tools
Calculate trace width (IPC-2152), trace impedance, and maximum current capacity for copper weights.
SMD Resistor Calculator
Decode 3-digit, 4-digit, and high-precision EIA-96 codes to find exact resistor values instantly.
Through-Hole Resistor Calculator
Interactive color band visualizer for 4-band, 5-band, and 6-band axial resistors.
Invoice & Estimate Generator
Quick estimate spreadsheets. Compile hours and parts, add taxes, and print/save direct PDF layouts.