LoRa soil monitor Reference Design
This is a LoRa soil monitor Reference Design. It uses a STM32L031G6U6S microcontroller and a RFM95W-915S2 LoRa transceiver, integrated with sensor interfacing and LED indicators. Communication occurs via USART and SPI. The system is powered using a battery. #referenceDesign #simple-embedded #stm #template #reference-design... show more0 Uses
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oscilador 555
copilot Entiendo que deseas diseñar un oscilador utilizando el chip 555. Aquí están algunos pasos que puedes seguir para hacer esto. Conecta el pin 1 (GND) del IC 555 a la terminal negativa de tu fuente de alimentación (0V). Conecta el pin 8 (VCC) del IC 555 a la terminal positiva de tu fuente de alimentación (11V). Conecta la resistencia de 10kΩ (R1) entre el pin 8 (VCC) y el pin 7 (DISCHARGE) del 555. Conecta tu potenciómetro de 100kΩ (R2) entre el pin 7 (DISCHARGE) y el pin 6 (THRESHOLD) del 555. Junta los pines 2 (TRIGGER) y 6 (THRESHOLD) juntos y conecta los pines unidos al lado negativo de tu condensador de 10nF (C). Conecta el lado positivo del condensador de 10nF (C) a VCC (el pin 8). Conecta el pin 4 (RESET) al VCC si no quieres usar la función de reset. De lo contrario, puedes conectar una señal de reset aquí. Conecta el pin 3 (OUTPUT) del 555 al terminal positivo de tu resistencia de 470Ω. Conecta el otro terminal de la resistencia a tierra. El condensador de 10uF debe estar conectado en paralelo a la alimentación (entre VCC y GND) para suavizar cualquier ruido en la fuente de alimentación de 11V. Te sugiero que experimentes con el valor del potenciómetro (R2) hasta que consigas el Duty Cycle deseado. Por lo general, es posible cambiar la frecuencia del pulso y ajustar el Duty Cycle utilizando este control. Si, después de realizar estas conexiones y ajustes, aún no puedes obtener el Duty Cycle deseado, podría ser indicativo de que los valores de resistencia y condensador que tienes no son adecuados para tu rango de frecuencia y Duty Cycle objetivo. Para que obtengamos un Duty Cycle del 75%, necesitamos usar el chip 555 en modo astable y debemos calcular los valores de R1 y R2 (resistencia total de carga y descarga respectivamente) que nos ayude a conseguir esto. El tiempo de alta (T_high) y el tiempo de baja del ciclo (T_low) de la oscilación salen determinados por R1, R2, y C (el condensador). Se pueden usar las siguientes fórmulas para calcularlos: T_high = 0.693 * (R1 + R2) * C T_low = 0.693 * R2 * C Duty cycle = ( T_high ) / ( T_high + T_low ) Para un Duty Cycle de 0.75: Estableceremos R1 como la resistencia de 10 kilohmios que se proporcionó. Con el potenciómetro de 100 kilohmios como R2, podemos variarlo para ajustar el Duty Cycle según necesitemos hasta que se llegue a la relación deseada. Considerando que el condensador C es el condensador de 10 nF que se proporcionó, anteriores declaraciones son bajo supuesto que el tiempo de operación (T = T_high + T_low) caiga en un rango aceptable. Para el esquemático: Conecta VCC de tu 555 al terminal positivo de tu fuente de voltaje de 11V y GND a tierra. Conecta los pines 2 (TRIGGER) y 6 (THRESHOLD) juntos y al lado negativo de tu condensador de 10nF. Conecta el lado positivo del condensador a VCC. Conecta el pin 3 (OUTPUT) al terminal positivo de tu resistencia de 470 ohmios. Conecta el otro terminal de la resistencia a tierra. Conecta tu resistencia de 10 kilohmios entre VCC y los pines 2 y 6 del 555. Finalmente, conecta tu potenciómetro entre los pines 2 y 6 y el pin 7 (DISCHARGE) del 555. El condensador de 10uF debería estar conectado en paralelo a la alimentación para suavizar cualquier ruido en la alimentación de 11V. Estas son mis suposiciones y pasos sugeridos pero recuerda variar el potenciómetro hasta conseguir el Duty Cycle deseado en caso de no conseguirlo de forma inmediata. Si por alguna razón no puedes conseguir el Duty Cycle de 75%, es posible que las resistencias y condensadores proporcionados no sean los adecuados para el rango de frecuencia y Duty Cycle deseados. En tal caso, puede que tengas que utilizar otros valores de componentes.... show more0 Uses
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TCPBL18336MTBA0055 7ae5
The SAMSUNG ELECTRO-MECHANICS Polymer Tantalum Capacitor, part number TCPBL18336MTBA0055, is a RoHS and Halogen compliant electronic component designed for reliable use in a wide range of applications. Featuring a capacitance of 33µF with a tolerance of +20% and rated for 18V, this capacitor supports a surge voltage of 23.4V and exhibits a maximum equivalent series resistance (ESR) of 55mΩ. It is encapsulated in a 3528 package with dimensions of 3.5mm x 2.8mm x 1.1mm. The component operates effectively within temperature ranges from -55°C to 105°C, adhering to its specified tolerance. The Samsung TCPBL18336MTBA0055 capacitor ensures stable electrical performance characterized by its impedance, DF, ESR, leakage current, and other critical parameters measured at conditions such as 120Hz, 1.0Vrms, and 1.0-2.0V D.C at 25°C. Reliability tests including shear, bending, solderability, and resistance to soldering heat confirm its robustness against mechanical and thermal stresses. Additionally, the capacitor maintains electrical integrity through vibration tests and moisture resistance, with it being specified for high-temperature load life of up to 2000 hours. Its packaging is in a 7" reel configuration for ease of supply chain and assembly line integration, and recommended for reflow soldering with a peak temperature of 250°C. The TCPBL18336MTBA0055 is marked for easy identification with voltage, capacitance, and production code, ensuring clear and concise information during usage. This component is suitable for engineers seeking capacitors with reliable high frequency and ripple current performance, required for advanced electronic circuit designs.... show more0 Uses
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Bluetooth Power Logger
A Bluetooth Power Logger utilizing Seeed Studio's XIAO nRF52840 uC Power Monitoring handled using the INA260 IC, this design should be safe for usage under 36V 8A. Higher current rating will require larger trace widths on the main power trace. Attach your Power Supply to V+ and GND. Then attach your loading device to LOAD+ and GND.... show more0 Uses
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AT91SAM9260B-CU
The Atmel® | SMART SAM9260, manufactured by Atmel, is an ARM-based Embedded Microprocessor Unit (MPU), integrating the ARM926EJ-STM processor operating at 180 MHz. This MPU includes substantial on-chip memory and extensive peripherals, including an Ethernet MAC, USB Device and Host Ports, along with various standard interfaces such as USART, SPI, TWI, Timer Counters, and MultiMedia Card Interface. Architected on a 6-layer matrix delivering a maximum internal bandwidth of six 32-bit buses, it supports external 32-bit bus interfaces for SDRAM, static memories, CompactFlash, and SLC NAND Flash with ECC. The SAM9260 is available in 217-ball LFBGA and 208-pin PQFP packages. Key features include 8 Kbytes each of data and instruction cache, integrated MMU, two internal 4-Kbyte SRAMs, a 32-Kbyte ROM with bootloader, 22 Peripheral DMA channels, various power-on reset modes, two programmable clock signals, advanced interrupt controller, and multiple power management options for optimized performance and energy efficiency.... show more0 Uses
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TCA9555DBR 085d
The TCA9555, manufactured by Texas Instruments, is a low-voltage 16-bit I/O expander designed for both I2C and SMBus for operation with a supply voltage ranging from 1.65 V to 5.5 V. This component is aimed at providing general-purpose remote I/O expansion for most microcontroller families through the I2C interface. The TCA9555 is characterized by its low standby-current consumption of maximum 3.5 uA and includes notable features such as open-drain active-low interrupt output, 5-V tolerant I/O ports, and configurable slave addresses through 3 address pins. It is designed to assist in applications such as servers, routers, personal computers, personal electronics, and industrial automation equipment, among others. Its multiple package options, including TSSOP, SSOP, WQFN, and VQFN, accommodate different sizes and form factors suitable for diverse implementation requirements. The device distinguishes itself with a polarity inversion register and latched outputs capable of directly driving LEDs, showcasing versatility in usage. Its protection features exceed JESD 22 standards for ESD, ensuring robustness for industrial applications. The TCA9555's compatibility with various microcontrollers and support for up to 400-kHz I2C bus speed make it an efficient solution for expanding I/O capabilities in space-constrained applications.... show more0 Uses
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