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Arduino Nano: Overview, Specifications & Applications
Overview
The Arduino Nano is a compact, complete, and breadboard-friendly microcontroller board based on the ATmega328P. It offers functionally similar capabilities to the larger Arduino Uno, but in a significantly smaller form factor. It uses a Mini-B USB connection for programming and power rather than a standard Type-B connector, making it ideal for space-constrained DIY electronics, robotics, and embedded projects.
Key Specifications
| Parameter | Specification |
| Microcontroller | Microchip ATmega328P (8-bit AVR family) |
| Operating Voltage | 5 V |
| Input Voltage (Recommended) | 7 V – 12 V (via VIN pin) |
| Input Voltage (Limit) | 6 V – 20 V |
| Digital I/O Pins | 14 (of which 6 provide PWM output) |
| Analog Input Pins | 8 (10-bit ADC) |
| DC Current per I/O Pin | 40 mA |
| Flash Memory | 32 KB (with 2 KB used by bootloader) |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Clock Speed | 16 MHz |
| USB-to-Serial Chip | FTDI FT232RL |
| Dimensions | ~18 mm × 45 mm (0.73″ × 1.70″) |
Applications and Uses
Overview
The ESP32-WROVER-E Development Board is a powerful, feature-rich microcontroller board designed by Espressif Systems. It is built around the ESP32-D0WD-V3 SoC, featuring a dual-core 32-bit Xtensa LX6 processor. A defining feature of the WROVER series is the inclusion of an additional 8 MB of SPI PSRAM (Pseudo-static RAM) alongside standard flash memory, making it ideal for memory-intensive applications such as audio streaming, AI/ML edge processing, and complex web servers.
The board includes an integrated USB-to-UART bridge (Silicon Labs CP2102), Micro-USB connector for power and programming, onboard reset (EN) and boot buttons, status LEDs, and breadboard-friendly GPIO headers. It seamlessly supports Wi-Fi (802.11 b/g/n) and Bluetooth (v4.2 BR/EDR and BLE) connectivity.
Overview
The ESP32-CAM is a compact, low-cost microcontroller development board featuring the powerful ESP32-S chip integrated with Wi-Fi and Bluetooth (BLE) capabilities, alongside an onboard camera interface and MicroSD card slot. As shown in the image, it comes paired with an OV2640 2-Megapixel camera module and features an onboard bright white LED for flash or illumination. Its small form factor (27mm x 40.5mm) makes it an ideal solution for Internet of Things (IoT) vision projects, remote monitoring, and smart home automation.
Overview
The ESP32-DevKitC / ESP32-WROOM-32 is a powerful, low-cost micro-controller development board based on the Espressif Systems ESP-WROOM-32 module. Equipped with integrated Wi-Fi (802.11 b/g/n) and dual-mode Bluetooth (Bluetooth v4.2 BR/EDR and BLE), it is designed as a versatile, scalable solution for Internet of Things (IoT) applications, smart home systems, wireless sensor networks, and industrial automation.
The board includes an on-board CP2102 USB-to-UART bridge for seamless programming and debugging, an AMS1117 3.3V voltage regulator, Micro-USB connectivity, reset/boot push buttons, and standard 0.1″ header pins for rapid prototyping.
Product Datasheet: 2 x AA Battery Holder Case
2-Slot AA Battery Enclosure with Wire Leads (Series Connection)
Overview
This 2 x AA Battery Holder Case is a durable, plastic molded enclosure designed to hold two standard AA (LR6) 1.5V batteries in a series circuit configuration. Equipped with coiled spring contacts for secure cell retention and pre-stripped red (positive) and black (negative) wire leads, it delivers a total output voltage of 3.0V DC (or 2.4V DC when using rechargeable NiMH cells). The holder features side-printed specifications (‘MOLDING & MFG CO. – AA – MAX 1.5V’), mounting holes for secure attachment, and exposed metal rivet terminals on the front profile.
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