Efficiently switch electrical loads with G5V-1 and STM32F215RE without any noise
Switch smarter, not harder: Discover our SPDT relay solution
Published Oct 18, 2023
Click board™
Signal Relay Click
Dev. board
Fusion for STM32 v8
Compiler
NECTO Studio
MCU
STM32F215RE
Upgrade your systems with silent, spark-free switching by implementing our SPDT relay solution
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Hardware Overview
How does it work?
Signal Relay Click is based on four G5V-1s, an ultra-miniature, highly sensitive single-pole double-throw (SPDT) relays for signal circuits from Omron. The G5V-1 relays feature wide switching power of up to 1A, high sensitivity with 150mW of nominal coil power consumption, and fully-sealed construction, thus offering environmental resistance. The relay internal single-type contact is made as a single crossbar of gold and silver alloy. The relay output markings of the screw terminal
are labeled at the bottom of this Click board™ with additional info. Every relay has its LED for visual presentation, labeled OUT1-4. The Signal Relay Click uses four mikroBUS™ pins labeled RE1, RE2, RE3, and RE4 to communicate with the host microcontroller. All relays are driven through small amplifier transistors as a safe solution for the relays’ current and their impact on the host MCU. The Signal Relay Click also features small signal fast switching diodes on each relay to prevent
electrical noise. One thing to note is that the relays’ coils are 5-volts driven. This Click board™ can be operated only with a 5V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. Also, it comes equipped with a library containing functions and an example code that can be used as a reference for further development.
Features overview
Development board
Fusion for STM32 v8 is a development board specially designed for the needs of rapid development of embedded applications. It supports a wide range of microcontrollers, such as different 32-bit ARM® Cortex®-M based MCUs from STMicroelectronics, regardless of their number of pins, and a broad set of unique functions, such as the first-ever embedded debugger/programmer over WiFi. The development board is well organized and designed so that the end-user has all the necessary elements, such as switches, buttons, indicators, connectors, and others, in one place. Thanks to innovative manufacturing technology, Fusion for STM32 v8 provides a fluid and immersive working experience, allowing
access anywhere and under any circumstances at any time. Each part of the Fusion for STM32 v8 development board contains the components necessary for the most efficient operation of the same board. An advanced integrated CODEGRIP programmer/debugger module offers many valuable programming/debugging options, including support for JTAG, SWD, and SWO Trace (Single Wire Output)), and seamless integration with the Mikroe software environment. Besides, it also includes a clean and regulated power supply module for the development board. It can use a wide range of external power sources, including a battery, an external 12V power supply, and a power source via the USB Type-C (USB-C) connector.
Communication options such as USB-UART, USB HOST/DEVICE, CAN (on the MCU card, if supported), and Ethernet is also included. In addition, it also has the well-established mikroBUS™ standard, a standardized socket for the MCU card (SiBRAIN standard), and two display options for the TFT board line of products and character-based LCD. Fusion for STM32 v8 is an integral part of the Mikroe ecosystem for rapid development. Natively supported by Mikroe software tools, it covers many aspects of prototyping and development 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
Type
8th Generation
Architecture
ARM Cortex-M3
MCU Memory (KB)
512
Silicon Vendor
STMicroelectronics
Pin count
64
RAM (Bytes)
131072
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 Fusion for STM32 v8 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 Signal Relay Click driver.
Key functions:
signalrelay_relay_state- Relays state
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 Signal Realy Click example
*
* # Description
* Demo application is used to shows basic controls Signal Relay Click.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Configuring Clicks and log objects.
* Settings the Click in the default configuration.
*
* ## Application Task
* Alternately sets relays to ON-OFF state...
*
* \author Katarina Perendic
*
*/
// ------------------------------------------------------------------- INCLUDES
#include "board.h"
#include "log.h"
#include "signalrelay.h"
// ------------------------------------------------------------------ VARIABLES
static signalrelay_t signalrelay;
static log_t logger;
// ------------------------------------------------------ APPLICATION FUNCTIONS
void application_init ( void )
{
log_cfg_t log_cfg;
signalrelay_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.
signalrelay_cfg_setup( &cfg );
SIGNALRELAY_MAP_MIKROBUS( cfg, MIKROBUS_1 );
signalrelay_init( &signalrelay, &cfg );
signalrelay_default_cfg ( &signalrelay );
}
void application_task ( void )
{
uint8_t cnt;
// Task implementation.
for ( cnt = 1; cnt <= 4; cnt++ )
{
log_info( &logger, " *** Relay [ %d ] ON ", cnt );
signalrelay_relay_state( &signalrelay, cnt, SIGNALRELAY_STATE_ON );
Delay_ms ( 200 );
log_info( &logger, " *** Relay [ %d ] OFF ", cnt );
signalrelay_relay_state( &signalrelay, cnt, SIGNALRELAY_STATE_OFF );
Delay_ms ( 200 );
}
}
int main ( void )
{
/* Do not remove this line or clock might not be set correctly. */
#ifdef PREINIT_SUPPORTED
preinit();
#endif
application_init( );
for ( ; ; )
{
application_task( );
}
return 0;
}
// ------------------------------------------------------------------------ END
