280mm Irrigation Controller Enclosure
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Description
A rigid 280 × 200 × 90 mm printed enclosure designed specifically for an ESP32-based multi-zone plant irrigation controller.
The layout divides the internal volume into three distinct areas: high-current power distribution on the left, six MOSFET drivers in the center, and the low-voltage microcontroller logic on the right. An extra-wide central cable channel runs between the two rows of MOSFETs, and all high-traffic access areas—like screw terminals and adjustment dials—have generous working clearances.
The outer walls feature deep U-slots for cables, cut from the top edge so the main flat lid traps them cleanly in place without relying on separate cable glands.
Internal Layout details
- Zone A (Power): Mounts for a 56×35 mm DC-DC buck converter, a friction-fit bracket stack for four WAGO 221-415 lever connectors, and a C-clip for an inline 5A barrel fuse.
- Zone B (Switching): Two rows of custom mounts for six 35×32 mm MOSFET boards. Each uses exactly two diagonal standoffs to leave maximum free space around the terminals.
- Zone C (Control): Stand-offs for an ESP32 NodeMCU, with a dedicated USB-C opening aligned in the external right-hand wall.
- Structure: Embossed floor labels mark all hookup zones. Cable tie bridges are scattered throughout the base for organization, and vertical ventilation slots flank the rear and sides. Uses four M3 screws driven directly into heavy internal corner bosses to seal the lid.
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