Benefits and overview - Safe high voltage measurement with a simple resistor divider that scales down input voltages to the ADC range - High resolution measurement thanks to an AVR microcontroller with a 10-bit ADC - Wide compatibility with 5 V and 3.3 V systems while preserving accuracy - Useful for testing both voltage and current in various circuits and projects What this module does - Analog input range: the module accepts input voltages up to 5 V at the ADC, while the red terminal inputs can be up to 25 V when used with a 5 V system, or up to 16.5 V when used with a 3.3 V system - ADC resolution: the AVR chip provides 10-bit ADC conversion, delivering a resolution of 0.00489 V per step (5 V divided by 1023) - Minimum measurable step: the smallest detectable voltage is 0.02445 V (0.00489 V times 5) - Voltage division: the input on the red terminals is reduced by a factor of five via a resistor divider, allowing higher voltages to be measured safely by the ADC - Applications: suitable for testing both voltages and related electrical parameters in your projects Key specifications and behavior - Analog input range: up to 5 V for the ADC - Red-terminal input range (voltage to be measured): up to 25 V with 5 V systems; up to 16.5 V with 3.3 V systems - ADC: 10-bit resolution (1023 steps) - Voltage step size: 0.00489 V per LSB - Minimum detectable step at the measured input: 0.02445 V - Voltage divider factor: scales input by a factor of 5 2-3 practical use scenarios - Battery and power rail monitoring - Use in projects powered by 5 V or 3.3 V to monitor battery packs or supply rails that can reach up to 25 V (or 16.5 V on 3.3 V systems) while keeping the ADC within its safe range - Embedded sensor interfacing - Measure signals from external sensors or probes whose voltages may exceed the MCU’s direct input range, by safely scaling them down to a 0–5 V window - Development and testing of voltage and current in prototyping - Useful in lab or development settings to verify voltage levels and track changes during circuit testing without risking the MCU Usage notes - The module relies on a resistor divider to scale input voltages by a factor of five, making higher voltages measurable by the AVR 10-bit ADC - Ensure the measured voltage stays within the specified limits for your system (25 V max for 5 V systems, 16.5 V max for 3.3 V systems) - The stated resolution and minimum step refer to the ADC conversion on the AVR microcontroller and the designed divider network This description preserves the original functionality, specifications, and intended uses, presented in a clear and customer-friendly format suitable for decision making.