MIKROE-2396

MIKROE-2396 Datasheet

From MikroElektonika Documentation

Part	Datasheet
MIKROE-2396	MIKROE-2396 (pdf)

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R Meter click From MikroElektonika Documentation R Meter click is a mikroBUS add-on board with circuitry for measuring the value of resistors. The board can be used to measure a wide range of resistors from 0 to 1 Mega Ohm . It has three plates for SMD resistors 0603, 0805, 1206 and a header for thru hole resistors. Features and usage notes R Meter click The design of R Meter click is based on a non-inverting amplifier circuit, with the measured resistor placed in a feedback loop that influences the gain of the amplifier. The analog output is fed through a 12-bit ADC with the final output going through the mikroBUS SPI interface. Schematic also available in PDF Since the ADC has a limited minmax range 0-2043 , R Meter click employs a multiplexer that can adjust the input signal to the amplifier and thus allow the same ADC to measure four different scopes of values 0-1k , 1k-100k, 100k-1M The supplied firmware available on Libstock automatically scans the ADC value and switches the multiplexer output based on the resistor in place. The multiplexer interfaces directly with the target board MCU through mikroBUS S1, S2, and S3 pins in place of default mikroBUS PWM, INT and RST . Onboard screw terminals are placed to allow the click to be used with multimeter probes. R Meter click is a handy tool but it’s not to be used as a precision instrument. The linearity of the OpAmp impacts the measurement. R Meter click IC/Module 74HC4053 REF2925 genericPartNumber=ref2925&fileType=pdf AD8615 Interface SPI, S1, S2, S3 Power 5V supply Website The board is designed to use a 5V power supply. Programming This example shows how to set up R Meter click, and read out the resistance in ohms Ω every 250 ms. 1 #include <stdint.h> 2 #include "r_meter.h" 4 //sbits 5 sbit S1 at GPIOA_ODR.B0; 6 sbit S2 at GPIOD_ODR.B10; 7 sbit S3 at GPIOC_ODR.B2; 8 sbit R_METER_CS at GPIOD_ODR.B13; 10 //Prototypes 11 void system_setup void ; 13 //Main 14 void main //Local Declarations char txt[20] = 0 float ohms_var = 0; //Setup system_setup ; while 1 ohms_var = r_meter_get_ohms ;

PDF Datasheet Preview

R Meter click

From MikroElektonika Documentation

R Meter click is a mikroBUS add-on board with circuitry for measuring the value of resistors. The board can be used to measure a wide range of resistors from 0 to 1 Mega Ohm . It has three plates for SMD resistors 0603, 0805, 1206 and a header for thru hole resistors.

Features and usage notes

R Meter click

The design of R Meter click is based on a non-inverting amplifier circuit, with the measured resistor placed in a feedback loop that influences the gain of the amplifier.

The analog output is fed through a 12-bit ADC with the final output going through the mikroBUS SPI interface.

Schematic also available in PDF

Since the ADC has a limited minmax range 0-2043 , R Meter click employs a multiplexer that can adjust the input signal to the
amplifier and thus allow the same

ADC to measure four different scopes of values 0-1k , 1k-100k, 100k-1M

The supplied firmware available on Libstock automatically scans the ADC value and switches the multiplexer output based on the resistor in place. The multiplexer interfaces directly with the target board MCU through mikroBUS S1, S2, and S3 pins in place of default mikroBUS PWM, INT and RST .

Onboard screw terminals are placed to allow the click to be used with multimeter probes.

R Meter click is a handy tool but it’s not to be used as a precision instrument. The linearity of the OpAmp impacts the measurement.

R Meter click

IC/Module 74HC4053 REF2925 genericPartNumber=ref2925&fileType=pdf

AD8615

Interface SPI, S1, S2, S3

Power 5V supply

Website

The board is designed to use a 5V power supply.

Programming

This example shows how to set up R Meter click, and read out the resistance in ohms Ω every 250 ms.
1 #include <stdint.h>
2 #include "r_meter.h"
4 //sbits
5 sbit S1 at GPIOA_ODR.B0;
6 sbit S2 at GPIOD_ODR.B10;
7 sbit S3 at GPIOC_ODR.B2;
8 sbit R_METER_CS at GPIOD_ODR.B13;
10 //Prototypes
11 void system_setup void ;
13 //Main
14 void main
//Local Declarations
char txt[20] = 0
float ohms_var = 0;
//Setup
system_setup ;
while 1
ohms_var = r_meter_get_ohms ;

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Datasheet ID: MIKROE-2396 649482