DPDT Switch A DPDT switch or Double Pole Double Throw switch is an electromechanical switch with two inputs and four outputs, with each input having two corresponding outputs. A simple way to think of this switch is to imagine 2 SPDT switches side by side with the 'handles' attached to each other. Perhaps the most popular use for this switch is 'phase or polarity reversal'. So, how does the DPDT switch accomplish this? First, you have to wire the 2 'top' and 2 'bottom' terminals in a 'criss-cross' fashion. The top 2 terminals become the input and the middle two terminals become the output. Let pin1 is X,pin2 is Z,pin5 is Y and pin6 is W now, W & Y are connected, as are X & Z. The polarity is maintained because the input and output are directly connected When the switch is in the 'down' position. The + input goes from the 'W' terminal, down to the lower right, and then up to the 'Z' terminal. The negative input goes from the 'X' terminal and out through the 'Y' terminal. See what has happened? With one flip of a switch, polarity has been reversed. This switch is very simple to install electronic components because it includes a locking system that allows you to directly lock and unlock the switch in your remote cabinet without the use of any screws or Nut-Bolts. If you want to use this switch in your projects, for that you will need a few essential components like dc motors , batteries or power supply , bo motors , wires and connectors

DPDT Switch Box for Robot with 2 DPDT Switch, switch box with 2 DPDT Switch This is Robotics Switch Box Enclosure Without DPDT Switches. The switch box is used to accommodate two DPDT Rocker Switches. It is a perfect makeshift remote for your robot. This is a Remote Control Box for Wired Hobby Robot Control. To make the anti-clockwise motion of the motor, the polarity of the supply must be inverted in a clockwise motion. For “Polarity Reversal” DPDT switches are generally used. A Double Pole Double Throw (DPDT) switch is an electromechanical switch that has 2 inputs and 4 outputs and each input has 2 corresponding outputs that it can connect to. Applications: Remote-controlled robot. AVR-based robotics projects. ARM-based robotics projects. PIC-based robotics projects. Arduino-based robotics projects. Raspberry-pi-based robotics projects. Android-based robotic projects.

DRAGINO LORA BEE V1.1 + HOPERF RFM95-98(W) The Dragino Lora BEE is a LoRa module that allows the user to send data and provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. The LoRa BEE targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on. The RFM95/96W transceivers feature the LoRa long range modem that provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption read more : Node to Node LoRa communication using Nano 33 BLE Sense Note: You have to be aware that Radio link quality and performances are highly dependent on the environment. Better performances can be reached with: Outdoor environment. No obstacles. No high-level radio interferer in the ISM 868MHz band. At least 1 meter above the ground. read more : How to use ESP32 with LoRaBEE as a node in LoRAWAN Features: The Dragino Lora Bee V1.1 module allows for ultra-long range spread spectrum communication and high interference immunity while minimizing current consumption. It is based on the SX1276/SX1278 transceiver and targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and more. The Lora Bee is available in 433MHz, 868MHz, and 915MHz versions and features FSK, GFSK, MSK, GMSK, LoRa, and OOK modulation. It has a maximum link budget of 168 dB, programmable bit rate up to 300 kbps, and high sensitivity down to -148 dBm. The Hoperf RFM95-98(W) transceiver module features LoRa modulation and is available in 868MHz and 915MHz versions. read more : Node to Node communication on LoRa With ESP32 Applications : Automated Meter Reading Home and Building Automation Wireless Alarm and Security Systems Industrial Monitoring and Control Long-range Irrigation Systems GPS tracker

Dronacharya Vikas R&D DIY RC Drone Kit for Engineering Students and Researchers The Dronacharya Vikas R&D DIY RC Drone Kit is a comprehensive and versatile drone assembly kit designed to empower students, educators, and innovators in exploring UAV technology. Whether you are working on academic projects, developing prototypes, or researching autonomous systems, this DIY drone kit offers an immersive hands-on experience in drone integration, control mechanisms, and sensor applications. As a complete RC drone kit, it enables users to gain practical knowledge while fostering innovation in aerial robotics and research-based applications. Seamless integration & Open Source Suitable for smooth physical and logical integration of add-ons and payloads. (SRS) Steady, Robust, Safe Suitable for novice pilots and expert R&D projects. Swift & Easy, Assembly & Maintenance A well-designed drone decreases complexity across its entire lifecycle, from setup to operation. Features: Pixhawk-based Flight Controller for accurate navigation and autonomous control Supports the UART, I2C, and MAVLink protocols for smooth communication. ROS 2 and Simulation Software Suitable for cutting-edge autonomy research. Sensor Integration: Ultrasonic, LiDAR, GPS, IMU Ground Control Software: Supports Mission Planner and QGroundControl (QGCS). Modular design with customizable payloads and drone configurations. Introducing Dronacharya Vikas R&D DIY RC Drone Kit Applications: Engineering students and researchers. UAV development and autonomous system testing. STEM Education and Drone-Based Learning Environments This Kit Includes: 1 x Flight Controller: Radiolink MiniPix A compact and cost-effective flight controller based on the Pixhawk architecture, ideal for research and educational drones. Technical Specifications: Processor: STM32F427 32-bit ARM Cortex M4 core with FPU IMU: MPU6500 accelerometer/gyroscope Barometer: MS5611 Magnetometer: External required (GPS unit supports this) Input Voltage: 4.8V – 5.5V Communication Interfaces: 1 x UART (telemetry), 1 x USB, I2C, PPM, SBUS, PWM output Firmware: Supports PX4 and ArduPilot Weight: ~15g Form Factor: Compact and lightweight, ideal for small drones 1 x GPS Module: Radiolink TS100 High-performance GNSS module with integrated compass for accurate global positioning and navigation.. Technical Specifications: GNSS Systems: GPS, GLONASS, Beidou Positioning Accuracy: ±2.5 meters (horizontal) Refresh Rate: 10 Hz Compass: Built-in digital compass (HMC5883L) Communication: UART and I2C Operating Voltage: 5V DC Antenna: Ceramic active antenna LED Indicator: Satellite fix status Weight: ~20g Mounting: Includes anti-vibration mount and cable 4 x Brushless Motors: 920KV 2212 (2 CW + 2 CCW) KV Rating: 920KV Configuration: 14 Poles / 12 Slots Max Current: ~15-18A Mounting Hole Distance: 16mm x 19mm Propeller Compatibility: 8”–10” props Shaft Diameter: 3.17mm Weight: ~55g each 4 x Electronic Speed Controllers: Hobbyking 20A ESC (Custom Vikas Connectors) Max Current: 20A continuous, 25A burst (10s) BEC Output: 5V / 2A Linear Firmware: Custom firmware compatible with SimonK/BLHeli Connector: Proprietary Vikas plug-in system for easy swaps 4 x Motor Mounts (Molded Plastic Shells) Custom-designed heavy-duty motor mounts made from durable molded plastic Withstand vibration and mechanical stress Allow for fast, tool-less replacements 8 x Arm Bases (Custom Vikas Shell) Precision-molded hard plastic that securely holds the frame together Designed to fit modular carbon arms and ensure easy maintenance 4 x Carbon Fiber Arms (Custom-Made for Vikas) Lightweight yet highly rigid Designed for modular swapping and high endurance Mounting compatible with Vikas motor mounts and bases 4 x Carbon Fiber Landing Poles Shock-absorbing landing gear Carbon fiber structure ensures durability during repeated takeoffs/landings 1 x Top Plate (Universal Integration Platform) Designed for wide compatibility with various drone components Supports multiple battery sizes and payloads CNC-cut for precision and flexibility in mounting 1 x Bottom PCB (Proprietary R&D Enabler) Designed specifically for R&D and prototyping Integrated voltage rails: 5V, 3.3V, and 12V outputs Power distribution for ESCs, sensors, onboard computers (Raspberry Pi, Jetson Nano, etc.) Solder pads and headers for custom circuit integration 1 x 2200 mAh Li-Po Battery Voltage: 11.1V (3S) Capacity: 2200 mAh Discharge Rate: 25C – 35C Connector: XT60 1 x Li-Po Balance Charger Supports 2S–3S Li-Po batteries LED indicators for cell balance and charging completion Over-voltage and over-current protection 1 x Set of Consumables Zip ties, double-sided tape, Velcro straps For cable management and secure mounting 1 x Fasteners Kit for Vikas Screws, bolts, and nuts compatible with all parts of the Vikas drone Stainless steel and anodized aluminum mix 1 x 2.5mm Allen Key Provided for assembly and maintenance 1 x Set of Silicon Landing Caps Soft end caps for landing poles Reduces vibration and wear during landings 1 x Propeller Set (CW & CCW) 2 x Clockwise and 2 x Counterclockwise Balanced for smooth flight and efficient thrust

DRV8825 Stepper Motor Driver Module The DRV 8825 stepper motor driver carrier is a breakout board for ti’s DRV 8825 micro-stepping bipolar stepper motor driver. The DRV 8825 features adjustable current limiting, overcurrent and over-temperature protection and six micro-step resolutions (down to 1 or 32step). It operates from 8.2 45 V and can deliver up to approximately 1.5 A per phase without a heat sink or forced air flow (rated for up to 2.2 A per coil with sufficient additional cooling). This product is a carrier board or breakout board for ti’s DRV 8825 stepper motor driver; we, therefore, recommend careful reading of the DRV 8825 datasheet before using this product. This stepper motor driver lets you control one bipolar stepper motor at up to 2.2 A output current per coil (see the power dissipation considerations section below for more information). Here are some of the driver’s key features: simple step and direction control interface six different step resolutions: full-step, half step, 1 or 4step, 1 or 8step, 1 or 16step and 1 or 32step adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay) 45 v maximum supply voltage built-in regulator (no external logic voltage supply needed) can interface directly with 3.3 V and 5 v systems over-temperature thermal shutdown, overcurrent shutdown and under-voltage lockout short to ground and shorted load protection 4layer, 2 oz. If you want to control the stepper motor with this motor driver, for that you will need a few essential components like Arduino , breadboard , jumper wires , batteries or power supply . Use Aluminum Heatsink for DRV8825 Stepper Motor Driver for better performance and heat dissipation. Features: Simple step and direction control interface Microstep resolutions: full, 1/2, 1/4, 1/8, 1/16, and 1/32 Over-temperature thermal shutdown, over-current shutdown, and under-voltage lockout Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay) Six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step Short-to-ground and shorted-load protection Adjustable current control lets you set the maximum current output with a potentiometer. Hence lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates check out : A4988 Stepper Motor Driver

DRV8833 2 Channel DC Motor Driver The DRV8833 2 Channel DC Motor Driver is a small, powerful motor driver that controls two brushed DC motors. It works with motor voltages between 2.7V and 10.8V, providing up to 1.2A of continuous current per channel, with short bursts up to 2A. This makes it ideal for low-voltage, small-motor applications. The board comes fully assembled with the DRV8833 chip and includes a safety feature for reverse battery protection. It also has built-in current limits and doesn’t need an external power supply for the logic voltage, making it easy to use in various projects. Key features Dual-H-bridge for two DC motors or one stepper motor. Voltage range: 2.7V to 10.8V. 1.2A continuous (2A peak) per motor, 2.4A continuous (4A peak) when paralleled. 3V- and 5V-compatible inputs. Protection against under-voltage, over-current, and over-temperature. Reverse-voltage protection. Current limiting with optional sense resistors.

DS04-NFC 360° Continuous Rotation Servo Motor The DS04-NFC 360° Continuous Rotation Servo Motor is designed for makers, hobbyists, and robotics enthusiasts who need smooth, reliable, and fully rotating motion in their projects. With its 360-degree continuous rotation capability, this servo delivers stable torque, consistent performance, and effortless integration into RC cars, model aircraft, robotic arms, and other motion-based builds. Crafted from a durable metal-plastic blend, it ensures long-lasting use while staying lightweight and compact. This servo also features an adjustable median potentiometer for precise zero-point calibration, helping you fine-tune rotation behavior for accurate control. Operating between 4.8V–6V, the DS04-NFC provides strong output torque and smooth motion, even under demanding conditions. Whether you're building a robot, upgrading an RC model, or experimenting with DIY mechanisms, this servo offers dependable performance in a versatile and easy-to-install package. Features: Provides 360-degree continuous rotation, making it ideal for wheels, robotic motion, and steering mechanisms. Built with a high-quality metal + plastic housing, ensuring sturdiness, smooth edges, and long-term durability. Includes an adjustable median point potentiometer for precise zero-point tuning during setup. Offers stable performance with 5.5 kg/cm torque at 4.8V, suitable for RC vehicles and robot systems. Lightweight and compact design allows easy installation into aircraft, cars, robots, and DIY projects. Operates reliably between 4.8V to 6V, with low current usage (<1000mA). Comes with multiple rocker arms and mounting screws for quick assembly.

DS1307 Real Time Clock Module The DS1307 is a low-power clock/calendar with 56 bytes of battery backup SRAM. The clock/calendar provides seconds, minutes, hours, day, date, month and year-qualified data. The end date of each month is automatically adjusted, especially for months with less than 31 days. This is Tiny RTC Real Time Clock DS1307 I2C IIC Module for Arduino . It contains a DS1307 real-time clock IC . It’s one of the easiest to use RTCs out there, with Arduino and other libraries or simply use I2C commands to set and retrieve the time and date. Along with the DS1307 real-time clock, the module also has an Atmel 24C32 EEPROM chip which is handy for storing data without worrying about power loss. There is also space on the board to solder your own DS18B20 temperature sensor. DS1307 Real Time Clock module is used to track the current time and date. It is generally used in computers, laptops, mobiles, embedded system applications devices, etc. In many embedded systems, we need to put timestamps while logging data i.e. sensor values, GPS coordinates, etc. For getting timestamps, we need to use RTC (Real Time Clock). This module is based on the DS1307 IC from Dallas. It uses a 32.768 kHz clock. And supports I2C Interface. Pinout of DS1307: Pinout of DS1307 Real Time Clock Module Pin 1, 2: Connections for standard 32.768 kHz quartz crystal. The internal oscillator circuitry is intended for operation with a crystal having a specified load capacitance of 12.5pF. X1 is the input to the oscillator and can alternatively be connected to an external 32.768 kHz oscillator. The output of the internal oscillator, X2 is drifted if an external oscillator is connected to X1. Pin 3 : Battery input for any standard 3V lithium cell or another energy source. Battery voltage should be between 2V and 3.5V for suitable operation. The nominal write-protect trip point voltage at which access to the RTC and user RAM is denied is set by the internal circuitry as 1.25 x VBAT nominal. A lithium battery with 48mAhr or greater will back up the DS1307 for more than 10 years in the absence of power at 25ºC. UL is recognized to ensure against reverse charging current when utilized as part of conjunction with a lithium battery. Pin 4: Ground. Pin 5: Serial data input/output. The input/output for the I2C serial interface is the SDA, which is the open drain and requires a pull-up resistor, allowing a pull-up voltage of 5.5V. Regardless of the voltage on VCC. Pin 6: Serial clock input. It is the I2C interface clock input and is used in data synchronization. Pin 7: Square wave/output driver. When enabled, the SQWE bit set to 1, the SQW/OUT pin outputs one of four square-wave frequencies (1Hz, 4 kHz, 8 kHz, and 32 kHz). This is also an open drain and requires an external pull-up resistor. It requires the application of either Vcc or Vb at to operate SQW/OUT, with an allowable pull-up voltage of 5.5V and can be left floating, if not used. Pin 8: Primary power supply. When the voltage is applied within normal limits, the device is fully accessible and data can be written and read. When a backup supply is connected to the device and VCC is below VTP, read and write are inhibited. However, at low voltages, the timekeeping function still functions.

The DS1307 serial real-time clock (RTC) is a lowpower, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially through an I2C, bidirectional bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12- hour format with AM/PM indicator. The DS1307 has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply. Timekeeping operation continues while the part operates from the backup supply.

DS18B20 Digital Temperature Sensor Module The DS18B20 Temperature Sensor Module is your solution for precise temperature measurements in various applications. Compatible with Arduino, this digital sensor ensures accurate readings with a 12-bit resolution, providing temperature data with a precision of 0.5°C. Whether you're working on Arduino projects, monitoring industrial equipment, or controlling environmental conditions, this module offers the versatility you need. Its one-wire protocol simplifies connectivity, allowing multiple sensors to share a common wire to Arduino. Crafted for durability and reliability, this temperature sensor is suitable for a wide range of temperatures, making it an essential tool for hobbyists, professionals, and DIY enthusiasts. Get yours today and elevate your temperature sensing capabilities. The DS18B20 Temperature Sensor Module by Generic guarantees quality and durability, ensuring it meets the highest standards for your projects. Features: Digital signal output 18B20 Temperature Sensor Chip Resolution adjustment ranges from 9-12 bytes. Send data via a pin Temperature measurement ranges: -55°C to +125°C, be accurate to 0.5°C.