Summary of Power usage monitor using Atmel AVR using Atmega168 microcontroller
This project monitors home power usage using an Atmega168 microcontroller, logging data to an SD card and displaying real-time strip charts of voltage and current waveforms on a graphical LCD. Current is sensed via transformers, while voltage is measured through a 2000:1 divider network. Signal conditioning involves an LMC6484AIN quad op-amp and an AD623AN instrumentation amplifier for amplification.
Parts used in the Power Usage Monitor:
- Atmega168 microcontroller
- SD card module
- Graphical LCD display
- Current transformers
- 2000:1 voltage divider network
- LMC6484AIN quad op-amp
- AD623AN instrumentation amplifier
This project uses Atmega168 microcontroller to compute the power usage at home and logs it to an SD card. It has a graphical LCD display too that shows the power usage as a strip chart. Besides, the voltage and current waveforms can also be displayed on the LCD.
The current is measured using a pair of current transformers whereas the voltage is measured using a 2000:1 voltage divider network. An LMC6484AIN quad op-amp and an AD623AN instrumentation amplifier are also used for signal amplification from the current sensor and the voltage divider.
For more detail: Power usage monitor using Atmel AVR using Atmega168 microcontroller
- What microcontroller is used in this project?
The project uses an Atmega168 microcontroller to compute power usage. - How is the power usage data stored?
The system logs the computed power usage data to an SD card. - Can the device display voltage and current waveforms?
Yes, the graphical LCD can display both voltage and current waveforms. - What component measures the current?
A pair of current transformers is used to measure the current. - How is the voltage measured in this circuit?
Voltage is measured using a 2000:1 voltage divider network. - Which op-amp is used for signal amplification?
An LMC6484AIN quad op-amp is used for signal amplification from the sensors. - What type of amplifier is used for the instrumentation signal?
An AD623AN instrumentation amplifier is used alongside the op-amp. - Does the LCD show a strip chart of power usage?
Yes, the graphical LCD displays power usage as a strip chart.
