-
PoEthernet Shield
1 x Rs3,229.00 = Rs3,229.00 -
Membrane Keypad
1 x Rs205.00 = Rs205.00 -
Optical Finger Print Reader DP4500 URU
1 x Rs3,930.00 = Rs3,930.00 -
3V_RTC_Battery
1 x Rs15.00 = Rs15.00 -
MP3 Player Shield
1 x Rs2,608.00 = Rs2,608.00 -
2 Pin Tactile Switch Round
1 x Rs5.00 = Rs5.00 -
GSM Wire Antenna
1 x Rs195.00 = Rs195.00 -
ATmega328 with Arduino Optiboot (Uno)
1 x Rs466.00 = Rs466.00 -
L CLAMP
1 x Rs28.00 = Rs28.00 -
Arduino Stackable Header - 6 Pin
1 x Rs37.00 = Rs37.00 -
Thermal Printer
1 x Rs3,570.00 = Rs3,570.00 -
Arduino Yun
1 x Rs2,999.00 = Rs2,999.00 -
6 Pin Slide Switch
1 x Rs10.00 = Rs10.00 -
Fargo Maestro 20 GSM/GPRS Modem (Refurbished)
1 x Rs1,840.00 = Rs1,840.00 -
DC Gear Motor
1 x Rs175.00 = Rs175.00 -
RFID READER
1 x Rs605.00 = Rs605.00 -
Submersible Water Pump
1 x Rs650.00 = Rs650.00 -
Magnetic Read Switch
1 x Rs20.00 = Rs20.00 -
Water Float Switch
1 x Rs205.00 = Rs205.00 -
WCS2750
1 x Rs255.00 = Rs255.00 -
Digital Thermometer
1 x Rs590.00 = Rs590.00 -
Capacitive Fingerprint Reader WM701
1 x Rs4,875.00 = Rs4,875.00 -
JPEG Serial Camera
1 x Rs4,900.00 = Rs4,900.00 -
SPDT Mini Power Switch
1 x Rs53.00 = Rs53.00 -
Smart Card Reader
1 x Rs1,350.00 = Rs1,350.00 -
Simcard_Holder_Push_Type
1 x Rs76.00 = Rs76.00 -
GSM Stub Antenna
1 x Rs160.00 = Rs160.00 -
Low Cost RFID Reader
1 x Rs510.00 = Rs510.00 -
Zigbee
1 x Rs1,225.00 = Rs1,225.00 -
B-Type USB Connector
1 x Rs30.00 = Rs30.00 -
4 Pin Tactile Switch Small
1 x Rs5.00 = Rs5.00 -
Linear POT
1 x Rs190.00 = Rs190.00 -
Colour Sensor TCS3200
1 x Rs1,225.00 = Rs1,225.00 -
Fargo Maestro 100 Lite GSM/GPRS Modem (Refurbished)
1 x Rs1,740.00 = Rs1,740.00 -
Analog Gyroscope LPY530AL
1 x Rs920.00 = Rs920.00 -
Tilt Sensor - AT407
1 x Rs124.00 = Rs124.00 -
Blue Tooth HC-05 Module
1 x Rs1,225.00 = Rs1,225.00 -
Raspberry Pi - GPIO Shrouded Header (2x13)
1 x Rs62.00 = Rs62.00 -
12V 5W Solar Photovoltaic Module
1 x Rs820.00 = Rs820.00 -
Air Pump
1 x Rs700.00 = Rs700.00 -
Arduino ProtoShield Kit
1 x Rs745.00 = Rs745.00 -
Mini_Simcard_Holder
1 x Rs26.00 = Rs26.00 -
MOSFET Power Controller
1 x Rs468.00 = Rs468.00 -
Arduino Micro
1 x Rs2,045.00 = Rs2,045.00 -
Breakout Board for FT232RL USB to Serial
1 x Rs640.00 = Rs640.00 -
Water Solenoid Valve
1 x Rs410.00 = Rs410.00 - Rs46,161.00
- Shopping cart Checkout
A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits as amplifiers: they repeated the signal coming in from one circuit and re-transmitted it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operations.
A type of relay that can handle the high power required to directly control an electric motor or other loads is called a contactor. Solid-state relays control power circuits with no moving parts, instead using a semiconductor device to perform switching. Relays with calibrated operating characteristics and sometimes multiple operating coils are used to protect electrical circuits from overload or faults; in modern electric power systems these functions are performed by digital instruments still called "protective relays".
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