Hall Current 10 Click

How does it work?

Hall Current 10 Click as its foundation uses the ACHS-7194, a Hall-effect current sensor that sends an analog voltage proportional to the magnetic field intensity caused by the current flowing through the primary input conductor from Broadcom Limited. Without a magnetic field, the output voltage is half of the supply voltage. The ACHS-7194 can detect both DC and AC designed for the current range of ±40A. Device accuracy is optimized across the operating ambient temperature through the close proximity of the magnetic signal to the Hall sensors.

The thickness of the copper conductor allows the survival of the device at high overcurrent conditions. The terminals of the conductive path are electrically isolated from the signal leads. This feature enables the ACHS-7194 to be used in applications requiring electrical isolation without optoisolators or other costly isolation techniques.

The ACHS-7194 also has a ratiometric output that means it changes proportionally to the supply voltage. Just like that, the output voltage, analog signal, can be converted to a digital value using MCP3221, a successive approximation A/D converter with a 12-bit resolution from Microchip, using a 2-wire I2C compatible interface, or can be sent directly to an analog pin of the mikroBUS™ socket labeled as AN. Selection can be performed by onboard SMD jumper labeled as ADC SEL to an appropriate position marked as AN and I2C.

With the MCP3221, data transfers at rates of up to 100kbit/s in the Standard and up to 400kbit/s in the Fast Mode. Also, maximum sample rates of 22.3kSPS with the MCP3221 are possible in a Continuous-Conversion Mode with a clock rate of 400kHz.

This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the VIO SEL jumper. This way, it allows both 3.3V and 5V capable MCUs to use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.

Specifications

Pinout diagram

This table shows how the pinout on Hall Current 10 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
Analog Signal	AN	1	AN	PWM	16	NC
	NC	2	RST	INT	15	NC
	NC	3	CS	RX	14	NC
	NC	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	SCL	I2C Clock
	NC	6	MOSI	SDA	11	SDA	I2C Data
Power Supply	3.3V	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

Hall Current 10 Click electrical specifications

Software Support

We provide a library for the Hall Current 10 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for Hall Current 10 Click driver.

Key functions:

• hallcurrent10_cfg_setup – Config Object Initialization function.
• hallcurrent10_init – Initialization function.
• hallcurrent10_default_cfg – Click Default Configuration function.

Examples description

This library contains API for Hall Current 10 Click driver. The demo application reads ADC value, ADC voltage and current value.

The demo application is composed of two sections :

void application_task ( void ) 
{
    hallcurrent10_read_adc( &hallcurrent10, &adc_data );
    log_printf( &logger, " ADC Value   : %d rn", adc_data );
    Delay_ms( 100 );
    
    hallcurrent10_get_adc_volatge( &hallcurrent10, &adc_voltage );
    log_printf( &logger, " ADC Voltage : %.2f mV rn", adc_voltage );
    log_printf( &logger, "- - - - - - - - - - -  - -rn" );
    Delay_ms( 100 );
    
    hallcurrent10_get_current ( &hallcurrent10, ¤t );
    log_printf( &logger, " Current     : %.2f mA rn", current );
    log_printf( &logger, "--------------------------rn" );
    Delay_ms( 2000 );
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.HallCurrent10

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 click or RS232 click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.

mikroSDK

This Click board™ is supported with mikroSDK – MikroElektronika Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.

For more information about mikroSDK, visit the official page.