PIR Motion Sensor

Overview

The PIR (Passive Infra-Red) Sensor is a pyroelectric device that detects motion by measuring changes in the infrared levels emitted by surrounding objects. This motion can be detected by checking for a high signal on a single I/O pin.A PIR detectorcombined with a fresnel lens are mounted on a compact size PCB together with an analog IC,SB0081, and limited components to form the module. High level output of variable width is provided.

PIR Motion Sensor:

Features:

• Detection range: 2-3 meters
• Settling time: 60 seconds
• Compact size (24 x 32 mm)
• Supply voltage: dc3v-5v
• Current drain :< 50ua
• Voltage output: high/low level signal: 0-3. 3v
• High sensitivity
• Delay time: 5s-18 minute(as customer requirement)
• Operation temperature: -15oc -70 oc
• Infrared sensor: dual element, low noise, high sensitivity
• Light sensor: cds photocell (can be add as customer requirement.

ARM Schematic:

ARM Code:
For ARM Code Click here

ATMEL Schematic:

ATMEL Code:

For ATMEL Code Click here

PIC Schematic:

PIC CODE:
For PIC Code Click here

Ultrasonic Obstacle Sensor

Overview

Used to detect the move of human or object. Suitable for indoor and outdoor burglar proof application, vehicle application, ATM  survillence camera etc.

Ultrasonic Obstacle Sensor

Features:

• High sensitivity ,reliability, stability.
• Power voltage: DC 5v.
• Output Level: High 5v.
• Output Level: Low 0v.

For More design & Code Click Here

3 axis accelerometer-ADXL345

Overview

The ADXL345 is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16 g. Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4-wire) or I2C digital interface.

The ADXL345 is well suited for mobile device applications. It measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (4 mg/LSB) enables measurement of inclination changes less than 1.0°. Several special sensing functions are provided. Activity and inactivity sensing detect the presence or lack of motion and if the acceleration on any axis exceeds a user-set level. Tap sensing detects single and double taps. Free-fall sensing detects if the device is falling. These functions can be mapped to one of two interrupt output pins. An integrated, patent pending 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor intervention. Low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation. 

3 axis accelerometer-ADXL345:

Features:

• Ultralow power: as low as 40 μA in measurement mode and μA in standby mode at VS = 2.5 V (typical)
• Power consumption scales automatically with bandwidth User-selectable resolution
• Fixed 10-bit resolution
• Full resolution, where resolution increases with g range, up to 13-bit resolution at ±16 g maintaining 4 mg/LSB scale factor in all g ranges)
• Embedded, patent pending FIFO technology minimizes host processor load Tap/double tap detection
• Activity/inactivity monitoring
• Free-fall detection
• Supply voltage range: 2.0 V to 3.6 V
• I/O voltage range: 1.7 V to VS
• SPI (3- and 4-wire) and I2C digital interfaces
• Flexible interrupt modes mappable to either interrupt pin
• Measurement ranges selectable via serial command
• Bandwidth selectable via serial command
• Wide temperature range (−40°C to +85°C)
• 10,000 g shock survival
• Pb free/RoHS compliant 

For Design & Code Click here