Experience the future of parameter adjustments with PTA3043-2015CPB103 and PIC32MZ2048EFH100
Slide to precision: Our mechanical slider potentiometer elevates control
Published Oct 10, 2023
Click board™
Slider 2 Click
Dev. board
Flip&Click PIC32MZ
Compiler
NECTO Studio
MCU
PIC32MZ2048EFH100
We aim to empower your projects with the precision and reliability of our slider potentiometer, offering seamless adjustments and control for a wide range of uses
A
A
Hardware Overview
How does it work?
Slider 2 Click is based on the PTA3043, a linear, high-grade, 10K potentiometer from Bourns. This potentiometer has a 30 mm travel distance. The long travel distance of the wiper allows more accurate movements and combined with the high-quality manufacturing process it allows to dial-in the desired voltage with ease. This type of potentiometers are also known as sliders, thus the name for this Click board™. The potentiometer has a small dent in the middle, which enables tactile feedback when the center position is reached. The potentiometer is connected between the VREF and GND, acting as a voltage divider. Its wiper terminal outputs voltage in the range from 0 to 4.096V, depending on its position. The used potentiometer is linear, so the wiper potential changes linearly with its position. The voltage reference(VREF) is obtained from the MCP1501, a high-precision voltage reference IC from Microchip. The main purpose of this IC is to provide and retain a very accurate voltage of
4.096V. Its voltage reference is accurate enough for most applications where the analog output from the Slider 2 click can be utilized as a control voltage signal (CV). The output is buffered with a rail-to-rail, low-power operational amplifier, labeled as OPA344, produced by Texas Instruments. After the buffering op-amp, the output signal is delivered at the AN pin of the mikroBUS, labeled as VO on this Click Board, so it can be easily sampled by the internal A/D converter of the host microcontroller unit (MCU. Most MCUs have A/D peripherals that can use 4.096 as the reference voltage for the full-scale value (PIC 8-bit family is a good example). However, there are many cases where 2.048V is more adequate, so the Click board offers a choice: if there is a HIGH logic level at the RSL pin, the N-type MOSFET will open and another resistor will be introduced to the circuit. A voltage divider will be formed at the input of the buffering op-amp, which will halve the voltage from the potentiometer, reducing its maximum
value to 2.048V. When the logic level at the RSL pin is LOW, the N-type MOSFET will stay closed, so the second resistor of the voltage divider remains isolated. This will cause the full voltage level from the potentiometer to appear at the VO pin of the Click Board, in the range from 0 to 4.096V max. The MCP1501 IC has the #SHDN pin, used to shut down the IC when it's set to a LOW logic level. When this pin is set to a LOW logic level, the voltage reference output will be turned OFF, so there will be no voltage changes at the VO pin. By enabling the MCP1501 the voltage reference is established once again, so the Click Board can deliver an analog signal with the voltage ranging from 0 to 4.096V, or from 0 to 2.048V if the RSL pin is set to a HIGH logic level. It is recommended to start up the Click Board with the EN pin at the LOW logic level, to allow the internal power supply of the MCP1501 to reach its operational values.
Features overview
Development board
Flip&Click PIC32MZ is a compact development board designed as a complete solution that brings the flexibility of add-on Click boards™ to your favorite microcontroller, making it a perfect starter kit for implementing your ideas. It comes with an onboard 32-bit PIC32MZ microcontroller, the PIC32MZ2048EFH100 from Microchip, four mikroBUS™ sockets for Click board™ connectivity, two USB connectors, LED indicators, buttons, debugger/programmer connectors, and two headers compatible with Arduino-UNO pinout. Thanks to innovative manufacturing technology,
it allows you to build gadgets with unique functionalities and features quickly. Each part of the Flip&Click PIC32MZ development kit contains the components necessary for the most efficient operation of the same board. In addition, there is the possibility of choosing the Flip&Click PIC32MZ programming method, using the chipKIT bootloader (Arduino-style development environment) or our USB HID bootloader using mikroC, mikroBasic, and mikroPascal for PIC32. This kit includes a clean and regulated power supply block through the USB Type-C (USB-C) connector. All communication
methods that mikroBUS™ itself supports are on this board, including the well-established mikroBUS™ socket, user-configurable buttons, and LED indicators. Flip&Click PIC32MZ development kit allows you to create a new application in minutes. Natively supported by Mikroe software tools, it covers many aspects of prototyping thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.
Microcontroller Overview
MCU Card / MCU
Architecture
PIC32
MCU Memory (KB)
2048
Silicon Vendor
Microchip
Pin count
100
RAM (Bytes)
524288
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Flip&Click PIC32MZ as your development board.
Track your results in real time
Application Output
1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.
2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.
3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.
Software Support
Library Description
This library contains API for Slider 2 Click driver.
Key functions:
slider2_enable- This function sets desired state to EN pinslider2_set_reference- This function sets desired reference to RSL pin
Open Source
Code example
The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.
/*!
* \file
* \brief Slider2 Click example
*
* # Description
* This click utilizes potentiometer with long travel distance of the wiper
* witch allows more accurate movements and combined with the high-quality
* manufacturing process it allows to dial-in the desired voltage with ease.
* Its wiper terminal outputs voltage in the range from 0 to 4.096V.
* The used potentiometer is linear, so the wiper potential changes linearly with its position.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initialization driver init and ADC init.
*
* ## Application Task
* Read Slider data value and this data logs to USBUART every 500ms.
*
*
* \author MikroE Team
*
*/
// ------------------------------------------------------------------- INCLUDES
#include "board.h"
#include "log.h"
#include "slider2.h"
// ------------------------------------------------------------------ VARIABLES
static slider2_t slider2;
static log_t logger;
// ------------------------------------------------------ APPLICATION FUNCTIONS
void application_init ( void )
{
log_cfg_t log_cfg;
slider2_cfg_t cfg;
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, "---- Application Init ----" );
// Click initialization.
slider2_cfg_setup( &cfg );
SLIDER2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
slider2_init( &slider2, &cfg );
slider2_default_cfg( &slider2);
}
void application_task ( void )
{
slider2_data_t tmp;
// Task implementation.
tmp = slider2_generic_read ( &slider2 );
log_printf( &logger, "** ADC value : [DEC]- %d, [HEX]- 0x%x \r\n", tmp, tmp );
Delay_ms( 500 );
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
