MIKROE-2786

MIKROE-2786 Datasheet

PID MIKROE-2786

Part	Datasheet
MIKROE-2786	MIKROE-2786 (pdf)

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Water Detect click PID MIKROE-2786 Avoid plumbing and water leakage disasters Water Detect click is used for detecting water and other electroconductive liquids. If the detection area is wet the output of Microchip's MCP606 CMOS op-amp will go positive, signaling the presence of liquid. Water Detect click can be used as a household flood alarm sensor, rain detector for smart buildings or for water tanks that act as a limit switch for a pump. You could use it on one of our clicker 2 development boards, with GSM 4 click, or any other from the wireless range, and create a home flood alarm. Any time Water Detect click detects water it will send you an SMS. How the click works Water Detect click works by comparing the voltage of two resistor dividers using the MCP606 comparator. The resistor divider made of R2 and R3 is used as a voltage reference. The MCP606 functions as a comparator on this click board . The second divider is made of resistor R1 and the sensory area. When the sensory area is dry, it's resistance is near infinite, and the voltage applied to the inverting terminal of the comparator equals VCC. Since the voltage of the reference divider connected to the non-inverting input is VCC/2, the output of the comparator is at zero voltage. Once the liquid is present at the sensory area, it's resistance drops and pulls the voltage on the inverting input of the comparator toward zero volts. Once this voltage falls below VCC/2, the comparator output swings toward VCC signaling the presence of liquid. The comparator output is tied to the INT pin on the mikroBUS header. The water detection area is actually made of exposed conducting wires - simple but effective technology. Specifications Type On-board modules Interface Various Household flood alarm sensor, rain detector for smart buildings or water tank fill sensor, automated watering systems, etc. Water detection area, MCP606 comparator GPIO Input Voltage 3.3V or 5V Click board size L x mm Pinout diagram This table shows how the pinout on Water Detect click corresponds to the pinout on the mikroBUS socket the latter shown in the two middle columns . Notes Power supply Ground NC 1 AN PWM 16 NC NC 2 RST INT 15 INT NC 3 CS TX 14 NC NC 4 SCK RX 13 NC NC 5 MISO SCL 12 NC NC 6 MOSI SDA 11 NC +3.3V 7 3.3V 5V 10 +5V GND 8 GND 9 GND Notes MCP606 output water detect Power supply Ground Jumpers and settings Designator Name Default Position Default Option VCC SEL VCC SEL Left Power Supply Voltage Selection between

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Water Detect click

PID MIKROE-2786

Avoid plumbing and water leakage disasters

Water Detect click is used for detecting water and other electroconductive liquids. If the detection area is wet the output of Microchip's MCP606 CMOS op-amp will go positive, signaling the presence of liquid. Water Detect click can be used as a household flood alarm sensor, rain detector for smart buildings or for water tanks that act as a limit switch for a pump. You could use it on one of our clicker 2 development boards, with GSM 4 click, or any other from the wireless range, and create a home flood alarm. Any time Water Detect click detects water it will send you an SMS.

How the click works

Water Detect click works by comparing the voltage of two resistor dividers using the MCP606 comparator. The resistor divider made of R2 and R3 is used as a voltage reference.

The MCP606 functions as a comparator on this click board .

The second divider is made of resistor R1 and the sensory area. When the sensory area is dry, it's resistance is near infinite, and the voltage applied to the inverting terminal of the comparator equals VCC.

Since the voltage of the reference divider connected to the non-inverting input is VCC/2, the output of the comparator is at zero voltage. Once the liquid is present at the sensory area, it's resistance drops and pulls the voltage on the inverting input of the comparator toward zero volts. Once this voltage falls below VCC/2, the comparator output swings toward VCC signaling the presence of liquid. The comparator output is tied to the INT pin on the mikroBUS header.

The water detection area is actually made of exposed conducting wires - simple but effective technology.

Specifications

Type

On-board modules Interface

Various Household flood alarm sensor, rain detector for smart buildings or water tank fill sensor, automated watering systems, etc.

Water detection area, MCP606 comparator

GPIO

Input Voltage 3.3V or 5V Click board size L x mm

Pinout diagram

This table shows how the pinout on Water Detect click corresponds to the pinout on the mikroBUS socket the latter shown in the two middle columns .

Notes

Power supply Ground

NC 1 AN PWM 16 NC

NC 2 RST INT 15 INT

NC 3 CS

TX 14 NC

NC 4 SCK RX 13 NC

NC 5 MISO SCL 12 NC

NC 6 MOSI SDA 11 NC
+3.3V 7 3.3V 5V 10 +5V

GND 8 GND 9 GND

Notes MCP606 output water
detect

Power supply Ground

Jumpers and settings

Designator Name

Default Position

Default Option

VCC SEL

VCC SEL

Left

Power Supply Voltage Selection between

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Datasheet ID: MIKROE-2786 649432