Connection Between MAX 233 and RS232 (DB9 Female)
Sunday, 21 October 2012
SIM 900 GSM/GPRS SHIELD FOR ARDUINO
IComsat is a GSM/GPRS shield for Arduino and based on the SIM900 Quad-band GSM/GPRS module. It is controlled via AT commands and fully compatible with Arduino.
Features
- Quad-Band 850/ 900/ 1800/ 1900 MHz
- GPRS multi-slot class 10/8
- GPRS mobile station class B
- Compliant to GSM phase 2/2+
- Class 4 (2 W @850/ 900 MHz)
- Class 1 (1 W @ 1800/1900MHz)
- Control via AT commands (GSM 07.07 ,07.05 and SIMCOM enhanced AT Commands)
- Low power consumption: 1.5mA(sleep mode)
- Operation temperature: -40°C to +85 °C
Thursday, 6 September 2012
Shock Sensor
SHOCK SENSOR
1. INTRODUCTION AND OVERVIEW
Shock and impact sensors are devices that detect sudden or severe impact at a predetermined
level and indicate whether the level has been exceeded. Shock sensors are a type of
transducer that responds to shock energy by producing another type of energy signal, usually
electrical. Shock sensors are essentially seismic detectors which pick up vibrations. Shock
indicators are employed to check the adverse effect of excess shock on an item being
monitored. Shock sensors should be sensitive to shock, insensitive to any other property, and
should not influence the measured property. Shock and impact sensors are commonly used in
heavy industries.
Shock and impact sensors are used in many applications. Examples include automobile
security systems, military applications, and laboratory test equipment. Shock and impact
sensors are also used in industrial manufacturing equipment.
The product features include:
· Single bit output
· Small size makes it easy to conceal
· Plastic housing to provide protection for the electronic circuitry
· Indicator LED for indication of a shock
· Compatible with all types of microcontrollers
· High sensitivity to shock and impact
2. PRODUCT SPECIFICATION
- Pin Definitions and Ratings
Pin Name Function
Red Vcc Connects to Vcc (+5V to + 12V)
Black GND Connects to Ground
Blue Output Connects to an I/O pin set to INPUT mode (or
transistor/MOSFET). This is an NPN output, when sensor
detected shock it will short the signal to GND, else the internal
NPN transistor is open.
PCB Design
- Procedure for PCB Design
STEP 1
STEP 3
STEP 4
STEP 5
STEP 6
STEP 7
STEP 8
STEP 9
STEP 10
STEP 11
List of Components used in Arduino Schematic
| List of Components: -10 Ways Straight Box Header |
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| -2510 PCB Connector 4 Ways | |||||||||||||||||||||||||||||
| -6x6x1 Push Button 4Pin | |||||||||||||||||||||||||||||
| -9V Battery Holder | |||||||||||||||||||||||||||||
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