Arduino Schematics

8km UART Through Hole RF Transceiver Modules and Modems RoHS,3.3V~5.2V,-40 ~ 80C The E32-433T30D is based on the Semtech SX1278 LoRa chipset and uses LoRa spread-spectrum modulation to achieve long-distance, highly reliable wireless communication even in noisy environments. It communicates with a microcontroller via UART (serial interface), making it easy to integrate with Arduino, ESP32, STM32, and similar systems. It is commonly used for IoT telemetry, remote control systems, sensor networks, and industrial monitoring, especially where GSM/Wi-Fi is unavailable or impractical. Key Features Frequency range: 410–441 MHz (433 MHz default) RF output power: 21–30 dBm (up to 1 W high-power version) LoRa modulation: High sensitivity and strong anti-interference Communication distance: up to ~8 km (open area, ideal conditions) Interface: UART TTL serial (3.3 V logic level) Sensitivity: around -147 dBm for long-range reception Low data rate support: ~0.3 kbps to 19.2 kbps Half-duplex communication (TX/RX not simultaneous) Configurable modes: normal / wake-up / power-saving / sleep via M0 & M1 pins Compact module size with SMA antenna connector Wide operating temperature: -40 °C to +85 °C Important Notes Requires external microcontroller (MCU) for operation (not standalone). Must not leave M0 and M1 pins floating (must be defined HIGH/LOW or GND). Works best with proper 433 MHz antenna (2–5 dBi recommended). Power supply must be stable (typically 5V with sufficient current capability). For maximum range, line-of-sight + correct antenna height matters more than raw power. Applications Smart agriculture monitoring Remote sensor networks Utility meter reading (water/gas) Industrial telemetry systems Drone/robot communication links Remote control & automation systems #E32_433T30D #Ebyte #LoRa #SX1278 #WirelessModule #IoT #Telemetry #LongRangeCommunication #UART #433MHzLoRa #EmbeddedSystems

ZMPT101B is a high-precision current-type voltage transformer designed for AC voltage sensing, monitoring, and power measurement applications. It provides excellent electrical isolation between high-voltage AC lines and low-voltage measurement circuits, making it ideal for energy monitoring systems, smart meters, power analyzers, and microcontroller-based projects using Arduino, ESP32, and similar platforms. Its compact size, high accuracy, and stable performance enable reliable AC voltage measurement while maintaining user safety through galvanic isolation. Key Features High-precision AC voltage measurement Excellent galvanic isolation (up to 4 kV isolation voltage) Wide operating voltage measurement range High accuracy and good linearity Low phase angle error Compact PCB-mount package Suitable for voltage and power monitoring applications Good consistency and long-term stability Compatible with signal conditioning and ADC circuits Operating temperature range: -40°C to +60°C #ZMPT101B #VoltageTransformer #ACVoltageSensor #PowerMonitoring #EnergyMeter #IsolationTransformer #Arduino #ESP32 #IoT #EmbeddedSystems #Electronics #SmartMeter

a pcb contains 2 uv led drivers and arduino connected

Arduino Uno Smart Bin Status Shield: 2-layer JLCPCB-assembled Arduino shield with LEDs, buzzer MOSFET driver, reed-switch connector, and hand-soldered stacking headers.

ADS1115 series 16 Bit 860 Samples per Second Analog to Digital Converter (ADC) Evaluation Board Adafruit 1085 ADS1115 Adafruit 4-Channel ADC Breakout based on Texas Instruments ADS1115 (16-bit) or ADS1015 (12-bit) analog-to-digital converter, featuring I2C communication, four single-ended inputs or two differential inputs, programmable gain amplifier (PGA) up to x16, internal voltage reference, programmable comparator, and selectable I2C addresses (0x48–0x4B). Operates from 2.0V to 5.5V and supports interfacing analog sensors with 3.3V and 5V microcontrollers such as Arduino, ESP32, STM32, RP2040, and Raspberry Pi. Search Keywords: Adafruit 4-Channel ADC Breakout, ADS1115 Breakout, ADS1015 Breakout, Adafruit ADS1115, Adafruit ADS1015, I2C ADC Module, 16-bit ADC, 12-bit ADC, 4-channel ADC, differential ADC, programmable gain amplifier, PGA ADC, analog sensor interface, TI ADS1115, TI ADS1015, Raspberry Pi ADC, Arduino ADC module, ESP32 ADC expansion Hashtags: #Adafruit #ADS1115 #ADS1015 #ADCModule #I2CADC #16BitADC #12BitADC #AnalogToDigitalConverter #SensorInterface #DifferentialADC #PGA #Arduino #ESP32 #STM32 #RP2040 #RaspberryPi #DataAcquisition #EmbeddedSystems #AdafruitBreakout

Low-voltage logic-only CERILUME Phase 1 LED controller using an Arduino Nano ESP32 plug-in module, 5V logic level shifting for WS2812/SK6812 data, microphone input header, and labeled test pads. LED power distribution and high-current switching are intentionally out of scope.

Fully integrated Arduino Uno shield with 13.56 MHz RFID reader, microSD card interface, isolated relay output for a 120 VAC signal circuit, and 28 VDC to 5 V buck power input.

Microchip ATmega32U4 high-performance low-power 8-bit AVR microcontroller with integrated USB 2.0 full-speed device controller, up to 16MHz operation, 32KB Flash memory, 2.5KB SRAM and 1KB EEPROM, 12-channel 10-bit ADC, timers, PWM, SPI, TWI/I2C, USART, JTAG debug interface, watchdog timer, brown-out detection and multiple sleep modes, operating voltage range 2.7V to 5.5V, available in TQFP-44 and QFN-44 packages. Search Keywords: ATmega32U4, Microchip ATmega32U4, Atmel ATmega32U4, AVR USB microcontroller, 8-bit AVR MCU, ATmega32U4 USB, ATmega32U4 TQFP44, ATmega32U4 QFN44, 32KB Flash AVR, Arduino Leonardo MCU, Pro Micro MCU, ATmega32U4 datasheet Hashtags: #ATmega32U4 #MicrochipATmega32U4 #AtmelATmega32U4 #AVRMicrocontroller #8bitMCU #USBMicrocontroller #USBFullSpeed #32KBFlash #ArduinoLeonardoMCU #ProMicroMCU #TQFP44 #QFN44MCU AVR 32K FLASH 16MHZ 44-TQFP Atmel ATMEGA32U4-AU, 8bit AVR Microcontroller, 16MHz, 1 kB, 32 kB Flash, 44-Pin TQFP USB-C Pro Micro ATmega32U4 / Elite-C compatible module

Arduino Template based on ATMEGA328P-MU. This MCU is used in Arduino UNO Rev. 3, Arduino Nano V3.0, and some other. This template is a good starting point for your Arduino based project. #template #project #arduino #ATMEGA328P #project-template

Cyberdeck power distribution hub using a TP4056 Type-C Li-ion charger module, MT3608 boost converter module, switched output rail, voltmeter, servo, Arduino VIN, button signal header, and battery terminal on a 50 mm × 70 mm PCB.

Robust 6-channel TTL integration board for Arduino Mega 2560 interrupt inputs, with protected BNC inputs, 24V-compatible comparator translation, manual triggers, status LEDs, inverse-logic control, and enable control.

Template for Arduino Uno R3 Shield. Include an official pinout so you will always know Arduino names, the alternative roles of pins, which one is SDA, or SCL, etc. On PCB you can find the 3D model of the Arduino Uno R3 itself along with the board outline on the silkscreen. #Arduino #Uno #Shield #Template #project-template #project

Three-Terminal Fixed Positive Voltage Regulator The LM7812T is a three-terminal fixed positive linear voltage regulator IC designed to provide a stable +12V DC output from a higher input voltage source. It belongs to the widely used 78xx series regulators, where “12” indicates the fixed output voltage of 12 volts. It is commonly used in power supply circuits, embedded systems, and electronic devices that require a simple, reliable regulated 12V rail without the complexity of external components. The device operates as a linear regulator, meaning it reduces voltage by dissipating excess energy as heat, so proper heatsinking is often required for higher current loads. Key Features of LM7812T Fixed +12V output voltage Output current up to 1A–1.5A (depending on package and cooling) Input voltage range up to ~35V max Built-in thermal shutdown protection Internal current limiting and short-circuit protection Safe-area compensation for reliable operation No external components required for basic operation Good line and load regulation Low quiescent current (~8 mA typical) Available in TO-220 / TO-3 packages (LM7812T variants) Typical Applications DC power supplies (12V regulated rail) Arduino and microcontroller systems Industrial control electronics Sensor and communication circuits Battery-powered systems requiring stable 12V Audio amplifiers and small motor control circuits #CommonPartsLibrary #IntegratedCircuit #PowerManagement

Welcome to your new project. Imagine what you can build here.

Arduino-compatible pH probe interface using a high-impedance analog buffer and ADS1115 16-bit I2C ADC for improved pH measurement sensitivity.

Template for Arduino Nano Shield. Include an official pinout so you will always know Arduino names, the alternative roles of pins, which one is SDA, or SCL, etc. On PCB you can find the 3D model of the Arduino Nano itself along with the board outline on the silkscreen. #Arduino #Nano #Shield #template #project #project-template

Template for Arduino Uno R3 Shield. Include an official pinout so you will always know Arduino names, the alternative roles of pins, which one is SDA, or SCL, etc. On PCB you can find the 3D model of the Arduino Uno R3 itself along with the board outline on the silkscreen. #Arduino #Uno #Shield #Template #project-template #project

Example project for an Arduino MKR shield. It adds an external flash memory to the Arduino MKR. Based on the Arduino MKR Shield template. #project #arduino #shield #MKR

Template for Arduino Uno R3 Shield. Include an official pinout so you will always know Arduino names, the alternative roles of pins, which one is SDA, or SCL, etc. On PCB you can find the 3D model of the Arduino Uno R3 itself along with the board outline on the silkscreen. #Arduino #Uno #Shield #Template #project-template #project

Jerky Robot V3 100 mm × 152 mm 2-layer control board with ESP32-S3 and Arduino Nano sockets, screw-terminal I/O, BSS138 UART level shifting, PC817 sensor isolation, optional HX711 interface, status LEDs, test points, top-side component placement, and bottom GND fill for JLCPCB fabrication.

Template for Arduino Uno R3 Shield. Include an official pinout so you will always know Arduino names, the alternative roles of pins, which one is SDA, or SCL, etc. On PCB you can find the 3D model of the Arduino Uno R3 itself along with the board outline on the silkscreen. #Arduino #Uno #Shield #Template #project-template #project

This circuit is an ultrasonic distance meter based on an ATTiny2313 microcontroller. It uses an HC-SR04 ultrasonic sensor to measure distance and displays the results on an OLED display. The power supply is constructed using a Boost converter (TPS613222A) and a 2-cell AA battery. Additionally, it also includes ISP for programming, RESET and START switches, and LED indicators. #project #Template #projectTemplate #ultrasonic #OLED #arduino #attiny2313 #TPS613222A #ISP #referenceDesign #simple-embedded #microchip #template #reference-design .

Bipolar (BJT) Transistor NPN 40V 600 mA 300MHz 300 mW Surface Mount SOT-23-3 (TO-236) The MMBT2222ALT3G is a NPN general-purpose bipolar junction transistor (BJT) manufactured by onsemi, designed in a SOT-23 surface-mount package. It is the SMD version of the well-known 2N2222A transistor family, used for switching and signal amplification in compact electronic circuits. It is widely used in industrial, automotive (AEC-Q101 qualified variants), and general embedded systems due to its reliability, small size, and good electrical performance. Key Features NPN General-Purpose Transistor Suitable for switching and low-power amplification Collector-Emitter Voltage (Vceo) Up to 40 V Collector Current Up to 600 mA Power Dissipation Around 225–300 mW (depending on package conditions) High Frequency Performance Transition frequency up to ~300 MHz DC Current Gain (hFE) Typically ~100 at moderate currents Low Saturation Voltage Efficient switching performance for digital circuits SOT-23 Surface-Mount Package Compact footprint for modern PCB designs Wide Temperature Range Typically -55°C to +150°C RoHS / Lead-Free Compliant Environmentally compliant manufacturing Typical Applications LED switching circuits Relay driver stages MCU signal interfacing (Arduino, ESP32, etc.) Small motor drivers General signal amplification Automotive and industrial control circuits Important Note MMBT2222ALT3G = SMD version (SOT-23) Equivalent to 2N2222A (TO-92 through-hole version) in function, but not in physical package. 2N2222A SOT-23 #commonpartslibrary #transistor #bjt

Pulse induction metal detector using an Arduino Nano, TC4420-driven IRF3205 coil switch, TL072 analog gain stages, LM393 detection comparator, 12V input power, and buzzer alert, optimized for low-noise sensing and separated analog/power grounds.

2-layer Arduino Nano R4 inline Wiegand carrier board with reader and panel screw terminals, Brivo-compatible data remapping, and 12V pass-through to VIN.