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About TECircuit

Found: TECircuit has been operating since 2004.

Location: An electronics manufacturing service(EMS) provider located in Shenzhen China.

Item: Customizable EMS PCB, offers a full range of one-stop shop services.

Service: Printed Circuit Board (PCB)and Printed Circuit Board Assembly(PCBA), Flexible Printed Circuit Board(FPC), Components Sourcing, Box-Building, Testing.

Quality Assurance: UL,ISO 9001, ISO 14001, ISO 13485, ITAF 16949 andcomplied with ROHS and REACH.

Factory Pictures:
Company's own plant : 50,000 sqm; Employees : 930+; Monthly production capacity : 100,000 m2

PCBA Applications

• Precision Agriculture and Irrigation Scheduling: The PCBA enables real-time monitoring of soil moisture levels, allowing farmers to optimize irrigation systems. This ensures crops receive the right amount of water at the right time, conserving water and improving crop yield .

• Landscape and Golf Course Management: Integrated into irrigation controllers for lawns, parks, and golf courses, the soil monitor PCBA can prevent unnecessary watering cycles when the soil is already moist, such as after rainfall. This enhances irrigation efficiency and prevents the leaching of fertilizers and chemicals .

• Environmental and Agricultural Research: Researchers utilize these PCBA-based sensors in fields like environmental science and agronomy for studies on solute transport, soil respiration, and the impacts of climate change, relying on the accurate data they provide .

• Greenhouse Automation and Management: In controlled greenhouse environments, the PCBA is part of a smart monitoring system that senses soil moisture and other environmental parameters. This allows for precise irrigation management, optimizing plant growth conditions .

• Smart Home Gardening: For home gardeners, soil monitors with simple PCBA designs offer an easy way to check if plants have adequate moisture. These devices can be standalone or integrated into larger smart home ecosystems for automated plant care

PCBA Features

1. Dielectric Sensing Technology (Capacitive/FDR): Most modern soil monitor PCBs utilize capacitive or Frequency-Domain Reflectometry (FDR) sensing. They measure the soil's dielectric constant, which changes with water content, as water has a much higher permittivity than air or soil solids. This method is more corrosion-resistant and often provides more accurate measurements compared to resistive sensing .

2. Precision Signal Conditioning and ADC: The PCBA typically includes a precision analog front-end, such as a 24-bit Sigma-Delta Analog-to-Digital Converter (ADC) . This circuitry is crucial for converting the small, analog signals from the sensor probes into clean, high-resolution digital values that a microcontroller can process .

3. Wireless Connectivity Modules (Wi-Fi/Bluetooth): For IoT soil sensors, the PCBA integrates wireless modules like the ESP8266 . This allows the sensor to transmit data wirelessly to a central gateway, cloud platform, or smartphone app, enabling remote monitoring and control .

4. Low-Power Design and Power Management: To support long-term deployment in fields, the PCBA is designed for low power consumption. It often incorporates sophisticated power management integrated circuits (PMICs), support for battery power, and firmware that implements deep sleep modes to significantly extend battery life .

5. Microcontroller Unit (MCU) for Data Processing: A microcontroller (like an Arduino, ESP8266, or others) is the brain of the PCBA. It reads the sensor data, processes it, runs the communication protocols, and can make local decisions (e.g., triggering an irrigation valve) .

6. Soil-Specific Calibration and Compensation: The hardware and firmware are designed to allow for calibration to different soil types (e.g., clay, sandy) to ensure accuracy . Some advanced PCBA designs may also include components or algorithms to compensate for the effects of soil temperature and salinity on readings .

7. Robust and Corrosion-Resistant Probe Design: The sensor part of the PCB, often consisting of exposed copper traces or metal rods, is designed to be durable and resistant to corrosion, which is a common failure point for resistive sensors.

FAQ

​PCB & PCBA Description​

PCB Assembly OEM Service

Electronic Components Material Purchasing

Bare PCB Fabrication

Cable, Wire-harness Assembly, Sheet Metal, Electrical Cabinet Assembly Service

PCB Assembly Service: SMT, BGA, DIP

PCBA test: AOI, In-Circuit Test (ICT), Functioal Test (FCT)

Conformal Coating Service

Prototyping and Mass Production

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PCBA ODM service

PCB Layout, PCBA Design According To Your Idea

PCBA Copy/Clone

Digital Circuit Design / Analog Circuit Design/ lRF Design /Embedded Software Design

Firmware and Microcode Programming Windows Application (GUI) Programming/Windows Device Driver (WDM) Programming

Embedded User Interface Design / lSystem Hardware Design

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