SK hynix HMA42GR7AFR4N-TF 16GB DDR4 2133MHz CL15 ECC Registered Dual Rank 1.2V 288-Pin Server RAM
- 16GB
- 288-Pin DDR4 SDRAM
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LORDWORLD
A 40-pin HAT with dual DRV8825 drivers runs two stepper motors at up to 2.5 A with microstepping from full to 1/32-step via DIP switches
This HAT mounts on any Raspberry Pi model with a 40PIN GPIO header and also fits the Jetson Nano. It is aimed at makers and engineers who need to drive two stepper motors from a single-board computer without designing a custom driver circuit.
The board draws motor power from an external supply and passes regulated 5 V back to the host through the GPIO header, so the Pi or Jetson can be powered from the same source. Six microstepping resolutions from full-step to 1/32-step are selected by onboard DIP switches, and motor current up to 2.5 A is set with a potentiometer. Connectors accept various stepper pinouts, leaving other GPIO pins free for sensors or displays.
Dual DRV8825 controllers include overcurrent protection, thermal shutdown and VM undervoltage lockout to protect both the drivers and the motors during long moves. The integrated regulator maintains a stable 5 V rail for the host even when motor loads fluctuate, reducing the chance of brown-out resets on extended prints or CNC jobs.
| Brand | LORDWORLD |
|---|
The onboard dual DRV8825 controllers provide adjustable motor current up to 2.5A per channel, with thermal shutdown protection that activates if the IC temperature exceeds its internal limit during sustained high-current operation.
Each DRV8825 integrates thermal shutdown protection; at 2.5A continuous current the ICs will heat significantly and rely on the PCB copper and airflow to stay below the shutdown threshold, so adding heatsinks or forced air is recommended for all-day operation.
The standard 40PIN GPIO extension header fits all Raspberry Pi series boards with a 40-pin header and the Jetson Nano, allowing the HAT to stack directly without extra adapters.
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