Introduction:
Smart IntelliMeter is an ADE7758 3-phase bidirectional energy metering development/evaluation board with an onboard STM8S207 controller. The board can interface a serial I2C OLED display as well as an option for interfacing character LCDs (16×2, 20×2, 16×4, or 20×4) in 4-bit mode. The on-chip EEPROM of the controller is used to store the energy variables as well as calibration constants. The main features of the board are:
⚙️ Customizable (on-demand) CT Ratio ideal for a wide range of industrial applications
🛠 STM8S207 controller with 32K Flash, 6K RAM, and 1K EEPROM
⚡ An on-board 24MHz crystal for maximum processing speed of the controller
🔌 USB Type-C port for serial communication between the board and PC to access measurement data on the PC.
📟 I2C port for serial interfacing of OLED displays (e.g., 0.96″ or 1.3″ OLED display or similar)
🖥 4-bit interface for character LCDs (e.g., 16×2, 20×2, 16×4, 20×4 or similar)
🔧 Additional I/O pins for ADC and other purposes
The board includes ADE7758 24-pin SOIC which can also communicate via SPI communication with any external microcontroller unit to get the energy measurements. The technical specifications of the ADE7758 are:
- Highly accurate; supports IEC 60687, IEC 61036, IEC 61268, IEC 62053-21, IEC 62053-22, and IEC 62053-23
- Compatible with 3-phase/3-wire, 3-phase/4-wire, and other 3-phase services
- Less than 0.1% active energy error over a dynamic range of 1000 to 1 at 25°C
- Supplies active/reactive/apparent energy, voltage RMS, current RMS, and sampled waveform data
- Two pulse outputs, one for active power and the other selectable between reactive and apparent power with programmable frequency
- Digital power, phase, and RMS offset calibration
- On-chip, user-programmable thresholds for line voltage SAG and overvoltage detections
- An on-chip, digital integrator enables direct interface-to-current sensors with di/dt output
- A PGA in the current channel allows a direct interface to current transformers
- An SPI-compatible serial interface with IRQ
Applications:
- Can be used to measure the energy for any three-phase household appliances.
- Can be used to measure the electrical power parameters of industrial machines and restaurants etc.
- Can be used for personal/hobby projects.
For tutorials on various development boards, please visit our YouTube channel.
Download the schematic of the board here.
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