DUMLAB
Hardware

BUILT FOR THE
INDIAN WALL BOX.

Every board is designed against the real electrical conditions of Indian homes — not adapted from a 120V import.

PHYSICAL SWITCHGPIO interrupt · debounced
RELAY OUTPUT10A · 230V rated
TRIAC FAN CTRLZero-cross phase dimming
CLOUD + OTAMQTT · signed firmware
// CORE ELECTRONICS

WHAT'S ON THE BOARD

ESP32Dual-core MCU · WiFi + BLE · runs the full local control loop
RELAY10A · 230V rated · mechanical click feedback
TRIAC DIMMERPhase-angle control, 5 calibrated fan speed levels
ZERO-CROSS DETECTIONSynchronizes firing angle to the AC waveform
ISOLATED PSUMains-isolated 230V→5V supply, no shared ground
// BOARD ARCHITECTURE

TWO BOARDS, ONE MODULE

The mains-side electronics and the user-facing controls are split into separate PCBs on purpose — one stays hidden in the wall, the other can be replaced without an electrician.

MAIN AC BOARDMains-side relay, TRIAC and PSU — stays fixed behind the wall
FRONT UI BOARDI/O expander, tactile switches and status LEDs — the replaceable face
INTERCONNECT6-pin JST-PH link between the two boards
INPUT EXPANSIONI2C I/O expander driving 7 tactile switches
STATUS LIGHTINGAddressable RGB LEDs behind polycarbonate light pipes
// MANUFACTURING

FROM RESIN TO TOOLING

The front plate goes through a deliberate manufacturing ladder before it ever reaches injection molding.

01
SLA PROTOTYPE

Fast-iteration resin prints for fit-checks against real switchboard plates.

02
VACUUM CASTING

Low-volume production-representative parts for field testing.

03
ALUMINUM TOOLING

Bridge tooling for the jump to injection-molded volume production.

Enclosure material is selected against BIS-relevant flame and impact standards for in-wall electronics — not adapted from an import-market plastic.

// CONSOLE

BOOTS LIKE REAL HARDWARE

Because it is. This is the same serial output you'd see over USB.

serial0 · dumlab-core