Jaavin Electronic Solution
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CONSUMER ELECTRONICS . OEM MANUFACTURING
Smart Rice Cooker Controller PCB
PCB redesign
EMC compliance
OEM manufacturing
Production test jig
🌐 Client: Malaysia
📄 PRODUCT OVERVIEW
The Grayns Rice Cooker is the world's first appliance engineered to automatically reduce unhealthy sugars and starches from rice by up to 40%. Its patented four-stage cooking process — Thermosense Heating, Debond RDS, Transude Water, and Demoisturize — gelatinises the rice, forces Rapidly Digested Starch out of the grains, drains the starch-heavy liquid, then steams the rice to a low-GI, fluffy finish. The result is rice that is healthier for diabetics, weight management, and post-meal energy levels.
🔧 DESIGN BACKGROUND
Client had previously developed the controller PCB in-house but encountered serious performance issues caused by poor PCB layout resulting in noise and instability. They approached Jaavin to review and redesign the board. Jaavin identified the root-cause layout problems, then delivered a comprehensively improved design with correct EMC-compliant routing, added circuit protection and ESD measures, and applied Design for Manufacturability (DFM) principles throughout. Satisfied with the results, Grayns appointed Jaavin as their OEM partner to manufacture and supply the PCBA. The product successfully passed both SIRIM (Malaysia) and CCC (China) certification by CQC. Jaavin also developed a dedicated production test jig to ensure every board was fully verified before dispatch. Total production volume reached 5,000 units.
➡️| INPUTS
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Encoder signal
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4× limit switches
|➡️ OUTPUTS
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Servo motor driver
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BD6211F H-Bridge DC motor driver
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Safety cut-off relay
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LCD ST7565R display
📷 PROJECT PHOTOS
📝KEY FEATURES & CAPABILITIES
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STM32F0 series microcontroller for precise cooking stage control
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M24C01 EEPROM for non-volatile storage of cooking parameters and calibration data
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Servo motor driver for the automated starch-draining lid mechanism
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DC motor driver using BD6211F H-Bridge IC for tray actuation
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Encoder input for accurate motor position feedback
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4× limit switch inputs for mechanical stage detection
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Safety cut-off relay output to isolate power in fault conditions
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LCD COG 132×32 dot interface with ST7565R controller for user display
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Improved PCB layout eliminating noise and instability issues of original design
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Full EMC guideline compliance, ESD protection and circuit protection added
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DFM principles applied throughout for production consistency
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Custom production test jig developed by Jaavin for 100% board verification
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SIRIM (Malaysia) and CCC (China/CQC) certified product
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5,000 PCBA units manufactured and supplied as OEM