MIKROE-2396

ADC Click Board

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

**Features:**

* Non-inverting amplifier circuit

* Three plates for SMD resistors and header for thru hole resistors

* SPI interface

* 5V power supply

* Screw terminals for multimeter probes

* Wide measurement rage 0-1k , 1k-100k, 100k-1M

* Firmware automatically adjusts for measured resistor

* Works in all MikroElektronika compilers

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

Since the ADC has a limited min-max 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.

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