Summary of AVR Wide Range LC,F, ESR Meter using AVR ATMega88PA-PU microcontroller
The LCFesR meter is a versatile instrument designed to measure inductance (L), capacitance (C), frequency (F), and equivalent series resistance (ESR) of capacitors in-circuit. Based on the AVR ATMega88PA-PU microcontroller, it offers precise, polarity-independent ESR measurements up to 30 ohms with a maximum voltage of 300 mV peak. It can accurately measure inductors from nanohenry to larger values, including air-core and toroid inductors. The design supports easy assembly using homemade PCBs and commonly available electronic components, making it suitable for reliable and stable wide-range measurements.
Parts used in the LCFesR meter:
- AVR ATMega88PA-PU microcontroller
- Homemade single or double-sided PCB
- Capacitors (various as needed for measurement and filtering)
- Inductors (for calibration and measurement)
- Resistors (for circuit configuration and measurement)
- ESR measurement circuit components
- Power supply components
- Input/output connectors
LCFesR meter is a precise, wide range meter that can measure inductivity (L), capacity (C), frequency (F) and equivalent series resistance of a capacitor in-circuit (ESR) based on AVR ATMega88PA-PU microcontroller. It can be easily built with homemade one or double-faced PCB and available electronic components.
dr. Le Hung, project designer, explained that measurement of ESR can be done continuously, in-circuit, polarity-independent, and max measuring voltage is 300 mV peak. The result of the ESR measurement is not affected by any other semiconductor part, bigger resistance, small ceramic capacitor that is connected parallel to the capacitor under test. The meter can measure ESR from 0-30 ohm.
The meter can be used to measure of inductor in nH range and larger (H value) inductor accurately and stable enough. So, measure air-core inductors and larger toroid inductors using this LCF meter will be no problem.
For more detail: AVR Wide Range LC,F, ESR Meter using AVR ATMega88PA-PU microcontroller
