Current/Voltage

Current/Voltage Sensors
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30A-1V Split-Core SCT013 AC Current Sensor (30A split core current sensor)
Description:

This is split-core current transformer is an AC current sensor. It is used for current measurement, monitor and protection for AC motors, lighting equipment, air compressors, home automation etc.

Features:

- Opening size: 13x13mm
- Rated input current (RMS): 10% - 120% of that is 3A - 36A
- Output voltage(RMS): linear output. When the input current is 30A, the output voltage is 1V
- Linearity: ± 3%
- Output connectors: 3.5mm standard three-pin plug
- Lead length: 1 m

What's in the box?

1 x Current sensor


This sensor is perfect for use with our Raspberry Pi RPICT3T1 current and temperature sensor board.
R159.90  Inc VAT
DC 5V WCS1800 Hall Current Detection Sensor Module 35A Precise With Overcurrent Signal LED (WCS1800 Hall Current)
Description:

The WCS1800 Hall Current sensor has two functions

  • current detection
  • over current protection (can be preset from 0.5A to 35.0A)

Features:

Operating voltage: DC 5V
Current detection range: DC +-35A, AC 25A
Linearity: K=60mV/A
Limit current range: 0.5A to 35A(for on/off value output)
Over current signal indicator LED
Sampling current conversion analog voltage signal output and it can connect ADC; TTL level signal output and it can connect MCU IO port control
Board size 37mm x 31mm
Working temperature: 25 to 85C

Interface



VCC: power positive
DOUT: TLL high/low level signal output
GND: power negative
AOUT: sampling current signal conversion voltage output port

Analog voltage signal output (AOUT)

Relationship between detection current and analog signal output is shown below:

Analog signal output: V0=Vcc*0.5±la*K (la is actual current through current detection pin, and K is linearity)

Eg: Input current is 1A, Vcc=5V and WS1800 linearity is 60mV/A
  1. When the current flows in from positive direction: V0=Vcc*0.5+la*K, V0=(2.5+0.06)V=2.56V
  2. When the current flows in from negative direction: V0=Vcc*0.5-la*K, V0=(2.5-0.06)V=2.44V
  3. If it is an AC signal: V0=Vcc*0.5+la*K, V0=(2.5+0.06)V=2.56V

The above are ideal values. There might be some precision errors.

On/Off output(DOUT)

  1. Make sure the current flows in from the positive direction. Adjust to the desired current warning level.
  2. LED will be on when current is below the setting and DOUT will be low.
  3. When the detected current is higher than your setting, the LED will turn off and the DOUT pin will go high.

Package Includes:

1 x WCS1800 Hall current detection sensor
R219.90  Inc VAT
INA219 I2C interface High Side DC Current Sensor Breakout power (INA219 I2C interface)
Description:

CJMCU-219 is a module with the I2C interface of zero drift and bi-directional current/power monitoring and control integrated circuit (IC), further expand the TI energy-saving electronic products.INA219 has the industry's highest precision and the small size, not only can monitor the pressure drop on the shunt resistor, sensing shunt power supply voltage, at the same time also can calculate the power.The device adopts the SOT23 packaging, but for the server, notebook computer, power supply, battery management and digital electric vehicle and telecommunication equipment measuring flu provide small, low cost solution.

INA219-40 c to 85 c temperature range and can realize the maximum error of 1% accuracy, maximum offset of 100 uV.The advantage of the high precision of the product in combination with 12 resolution, can help clients as much as possible, reduce the pressure drop on the shunt resistor, which can minimize the power loss and power consumption, and saving board space.The device epic of 26 bus voltage range of 0 V to V.

INA219 other important features include:
  • Calibration programmable registers can directly read its unit of measure is the ampere current, and power in watts per read.
  • For as many as 128 sampling averaging, in order to realize filter in noise environment.
  • The I2C interface has a timeout, not only can avoid the bus lock, but also can provide high-speed mode, meet the communication requirements of up to 3.4 MHz.
  • All features are support software programmable INA219.
  • Using single power supply, the working voltage between 3.0 to 5.5 V. 

Package Includes:

1 x INA219 board
R71.90  Inc VAT
DC Voltage detection Sensor (DC Volt sensor)
Description

This module is based on a resistive divider principle design, make the interface terminal input voltage reduced 5 times, A rduino analog input voltage up to 5V, then the input voltage of the voltage detection module can not be greater than 5V × 5 = 25V (if used 3.3V system, the input voltage can not exceed 3.3Vx5 = 16.5V). Because A rduino AVR chips used in 10 AD, so the resolution of the analog module is 0.00489V (5V / 1023), so the voltage detection module detects a minimum input voltage of 0.00489V × 5 = 0.02445V.

Parameters:
  • Voltage input range: DC0-25V
  • Voltage detection range: DC0.02445V-25V
  • Voltage analog resolution: 0.00489V

Wiring the DC input connector:
   
  • the positive terminal connected to VCC,
  • the negative  connected to GND
  • Output interface:
  • " " is 5 / 3.3V,
  • "-" then GND,
  • "s" Arduino connected to the AD pin

Raspberry Pi: https://kookye.com/2017/06/01/design-a-voltmeter-with-the-raspberry-pi-board-and-voltage-sensor/
 
What's in the box?

1 x  Voltage detection Module
R24.90  Inc VAT
100A-1V Split-Core SCT013 AC Current Sensor (100A split core current sensor)
Description:

This is a split-core current transformer which is used as an AC current sensor. It is popularly used for current measurement, monitoring and protection for AC motors, lighting equipment, air compressors, home automation etc.

Features:

- Opening size: 13 x 13mm
- Rated input current (RMS): 10% - 120% of that is 1A~100A
- Output voltage(RMS): linear output. when the input current is 100A, the output voltage is 1V
- Linearity: ± 3%
- Output connectors: 3.5mm standard three-pin plug
- Lead length: 1m

What's in the box?

1 x Current sensor
R159.90  Inc VAT
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