Gardening Care

EE2031E

Circuit & System Design Lab

(Mini-Project Demo)

Electronic Kit for plants lovers

Presented By

Kyaw Soe Hein(A0103612Y) & Lew Jiahui (A0105416R)

AgendaOverview

Plants are sophisticated living things- caring them would need

extra attention.

In gardening, daily watering process play the most important

part.

Under-watering- withering

Over-watering- Droopy Effect

Exposing sunlight would also have effect on photosynthesis

process.

Conceptual IDEA

Objectives & Specifications

Circuit Design

Demonstration of Application

Conceptual IDEAKey Areas of Interest

Monitoring & Sunlight Status

Buzzer & LED

Detector Circuit

Mositure Sensor Rain Sensor

Soil Moisture Status

Under-Watering Over-Watering • Optimum moisture

Condition for plants• Raining or Over-watering

condition• Sunlight Exposing Status

Objectives & SpecificationsObjectives• Develop Detectors/Sensors

for moisture & water • Develop light Sensor for

sunlight status• Integrate Sensors for

monitoring of watering process

• Activate Alarm when out of specified condition

Specification Moisture sensors- probe

soils resistance (>1.5Mohm & <2.5Mohm)

Rain Sensor- Copper Grid to detect presence of flooding or raining

Light Status – LDR circuit to detect Bright, Cloudy and Dark

Integrates together and develop logic circuit for alarm

Objectives & Specifications

Low moisture with Sunny light Inappropriate for plants (Alarm STATE)

Low moisture with Cloudy/Dark light

Moisture Sustainable

(No Alarm STATE)

High moisture with Sunny Light

Optimal condition for plants

(No Alarm STATE)

High moisture with Cloudy/Dark light

Good condition for plant

(No Alarm STATE)

(RAIN Detection or Over-watering)

Key Indicator as a ceiling of the logicRAIN detection(ALARM ACTIVATE) No RAIN Detection(Check the moisture &

Sunlight Status)

Circuit DesignMoisture SensorMetal Probes with BJT

Rain SensorPCB copper Grid with BJT

Light SensorLight Dependent Resistor with Op-amp

Monitoring ConditionsLogics Gates with Buzzer

Project Demonstration

Low moisture with Sunny light

Low moisture with Cloudy/Dark light

(Low Resistance in Probes Reading)

High moisture with Sunny Light

High moisture Cloudy/Dark light

(High Resistance in Probes Reading)

Rain/No Rain (demonstrate lastly)

(Short-circuit/Open-circuit)

Rain Detector takes time to dry up