LORDWORLD 4-ch Current/Voltage/Power Monitor HAT for Raspberry Pi

Four-Channel Power HAT for Raspberry Pi

This LORDWORLD HAT adds four independent current, voltage and power measurement channels to any Raspberry Pi board with a 40-pin GPIO header. It connects through the I2C/SMBus interface and also exposes I2C control pins for linking additional host boards. Makers and engineers can monitor each channel separately without designing custom analogue front-ends.

Practical limits of the I2C/SMBus interface

The onboard 0.1 Ω sampling resistor supports bi-directional current measurement up to 3.2 A per channel, while the embedded 12-bit ADC covers a 0–26 V range with successive conversion capability. Power values are calculated directly in an additional multiply register, so the host only reads the final result. The bus bandwidth and address space set the maximum number of stacked boards.

Replaces discrete shunt and ADC circuits

Builders who previously wired individual sense resistors, amplifiers and ADCs can now use a single HAT that fits the standard 40-pin header. The jump is worth it when a project needs four simultaneous, calibrated channels with minimal wiring and software overhead. It does not suit applications requiring higher current ranges or voltage spans beyond the stated limits.