MQ-7 Carbon Monoxide/CO Sensor Module for Arduino
Detection of concentration 10-1000ppmCO
Loop voltage: 10V DC
Heater voltage: 5V±0.2V ACorDC(high), 1.5V±0.1V ACorDC(low)
Load resistance: adjustable
Heating resistor: 31±3(indoor temperature)
Heating dissipation: 350mW
Sensitive part surface resistance: 2K-20K
Sensitivity: Rs(in air)/Rs(100ppmCO)5
Concentration gradient: 0.6
Temperature, humidity: 20±2, 65%±5%RH
Standard test circuit: Vc: 5v ±0.1v, Vh(high): 5v ±0.1v, Vh(low): 1.5v ±0.1v
Price 1450 Birr
Address Megenagna Zefmesh Grandmall 3rd floor 301
0922787347/0924468599/0923522790
VECTOR FOUR ENGINEERING

ZMPT101B AC Voltage Sensor Module. The sensor will sample the input and output an analog voltage, in the region of 0 - 5V. This makes it easy to use in power monitoring applications and checking supplies.
Input voltage range: 0 - 250 V AC
Output voltage range: analog 0 - 5 V AC
PCB board size: 50x19mm
Rated Input Current: 2mA
Retardation (rated input): “20′ (input 2mA, sampling resistance 100Ω)
Operating temperature: -40°C - +70°C
Price 1250 Birr
Address Megenagna Zefmesh Grandmall 3rd floor 301
0922787347/0924468599/0923522790
VECTOR FOUR ENGINEERING

15MM PU Open Belt T5 Timing Belt Width 15mm Polyurethane with steel core. (Fit for CNC machines,Laser machine,Engraving machine,and cutting machine!)
Price 1250 Birr per Meter
Address Megenagna Zefmesh Grandmall 3rd floor 301
0922787347/0924468599/0923522790
VECTOR FOUR ENGINEERING

ADXL337 Accelerometer for Arduino Projects. Triaxial accelerometer analog output.
Price 1500 Birr
Address Megenagna Zefmesh Grandmall 3rd floor 301
0922787347/0924468599/0923522790
VECTOR FOUR ENGINEERING

GY-273 HMC5883L Triple Axis Compass Magnetometer Sensor Module. Features & Specifications
Operating Voltage: 3V to 6V DC
I2C interface
1-2 degree heading accuracy
Integrated 12-bit ADC
160Hz max data rate
Range of -8 to +8 Gauss
Needs no external components
Easy to use with Microcontrollers or even with normal Digital/Analog IC
Small, cheap and easily available
Price 950 Birr
Address Megenagna Zefmesh Grandmall 3rd floor 301
0922787347/0924468599/0923522790
VECTOR FOUR ENGINEERING

A88 metal detector non-contact metal sensing detection module.
Price 650 Birr
Address Megenagna Zefmesh Grandmall 3rd floor 301
0922787347/0924468599/0923522790
VECTOR FOUR ENGINEERING

1-8S Lipo Li-ion/Fe Battery Voltage Tester Low Voltage Buzzer.
Use for 1-8s Lipl/Li-ion/LiMn/Li-Fe.
Voltage detection pricision: 0.01V.
Unit voltage display range: 0.5V-4.5V.
Total voltage display range: 0.5V-36V.
1S test mode voltage range: 3.7v-30v.
Low voltage alarm mode for 2-8S.
Alarm set value range: OFF-2.7V-3.8V.
When the voltage is below the set value,it will buzzer with red LED light,pre-set value 3.3V.
Push key which can change the voltage settings and save.
Price 950 Birr
Address Megenagna Zefmesh Grandmall 3rd floor 301
0922787347/0924468599/0923522790
VECTOR FOUR ENGINEERING

high power 12V 3PIN 15W 15000mW blue laser head for DIY LASER ENGRAVER and CNC cutting laser module. THIS IS NOT A FOCUSABLE LASER, ITS FIXED FOCUS, FOR ENGRAVING MACHINE ONLY!!
Can engrave & mark on stainless steel, very powerful.
Size: 40*70mm
Drive mode: external ACC constant current drive
Cooling method: forced air cooling
Operating voltage: 12V DC
Control interface: 2 * 2.54 (TTL control switch, PWM control power)
Shell material: aluminum, surface anodized
Collimator lens: optical glass coating
Price 14,500 Birr
Address Megenagna Zefmesh Grandmall 3rd floor 301
0922787347/0924468599/0923522790
VECTOR FOUR ENGINEERING

MQ-131 Gas Sensor Ozone detector.
the signal light indicates the output;
Dual signal output (analog output, and TTL-level output);
TTL output valid signal is low; (low output signal light, can be accessed by the microcontroller IO port)
the analog output increases with the concentration, the higher the voltage the higher the concentration;
ozone gas with high sensitivity (detection concentration range 10PPB-2PPM Ozone)
long life and reliable stability;
Fast response characteristics;
MQ131 gas sensor has high sensitity to Ozone, also sensitive to O3 CL2, NO2, etc. The sensor’s conductivity is more higher along with the gas concentration rising. Please use simple electrocircuit, Convert change of conductivity.
Price 1500 Birr
Address Megenagna Zefmesh Grandmall 3rd floor 301
0922787347/0924468599/0923522790
VECTOR FOUR ENGINEERING

GPIO Extension Board with Ribbon Cable. 40 Pin GPIO Extension Board with 40 Pin Rainbow Color Ribbon Cable for Raspberry Pi 1 Models A+ and B+, Pi 2 Model B, Pi 3 Model B, B+ and Pi Zero. Specifically designed for Raspberry Pi Model B+. With this kit you can connect your Raspberry Pi Model B+ 40 pin GPIOs direct to a breadboard.
Package List Includes :
(1) GPIO Extension Board x1
(2) 40 Pin GPIO Rainbow Color Ribbon Cable x1
Price 1250 Birr
Address Megenagna Zefmesh Grandmall 3rd floor 301
0922787347/0924468599/0923522790
VECTOR FOUR ENGINEERING

Ethernet Shield.
Based on the W5100 Wiznet. W5100 allows an uno board to connect to the internet. Stackable Design, can directly support Arduino official Ethernet Library. Supports up to four simultaneous socket connections. Can use to store files for serving over the network. Compatible with the Uno as well as Mega (1280/2560). Can be accessed using the Mini SD TF library. Operating voltage is 5V. Ethernet Controller: W5100 with internal 16K buffer. Connection speed is 10/100Mb.
Price 3000 Birr
Address Megenagna Zefmesh Grandmall 3rd floor 301
0922787347/0924468599/0923522790
VECTOR FOUR ENGINEERING

USB Host Shield.
Compatible with following hardwares:
Arduino Uno,
Arduino Diecimila / Duemilanove 328,
Arduino Mega 2560 (Recommended),
Arduino Mega 1280
- After achieving the Arduino USB HOST function, can communicate with other USB devices, and support USB HUB function.
Price 3000 Birr
Address Megenagna Zefmesh Grandmall 3rd floor 301
0922787347/0924468599/0923522790
VECTOR FOUR ENGINEERING

GT2 Timing Belt & Pulley. The belt is open-ended in length.
Price of GT2 Pulley 750 Birr
Price of GT2 Belt 650 birr per meter
Address Megenagna Zefmesh Grandmall 3rd floor 301
0922787347/0924468599/0923522790
VECTOR FOUR ENGINEERING

Good news for All
👉NERD will be opening hacker space and courses beginning next month!! Go to https://nerdethiopia.com to register now! Or call the phone numbers in the photos above!