Arduino Compatible UNO R3 DIP ATmega328P-PU CH340G Development Board is a rugged, classroom-proven Arduino UNO R3 development board featuring a removable 28-pin DIP socketed ATmega328P-PU microcontroller paired with a WCH CH340G USB-to-serial converter and an enhanced 78M05 5V voltage regulator. Furthermore, it adds bonus male breakout pin rows alongside the standard female shield headers for connecting female DuPont jumper wires directly. Therefore, if a student or engineer accidentally damages the microcontroller during high-voltage prototyping, the DIP-28 ATmega328P-PU chip can be swapped out in seconds without replacing the entire board.
Key Features:
- Socketed Replaceable 28-Pin DIP ATmega328P-PU: Allows instant chip replacement or standalone breadboard transfer after flashing your sketch on the UNO board.
- Reliable CH340G USB-to-Serial IC: Connects via a heavy-duty full-size USB Type-B port with stable high-speed serial communication.
- Heavy-Duty 78M05 5V Linear Regulator: Handles external DC barrel jack input voltages from 7V up to 12V–20V with superior thermal resilience for powering 5V sensors and relays.
- Extra Male Pin Header Rows: Includes auxiliary 2.54mm male header pins for power and GPIO signals naast the standard female shield sockets.
- 100% Arduino IDE & UNO R3 Shield Compatible: Pre-flashed with the standard Arduino UNO Optiboot bootloader (115200 baud).
Technical Specifications:
- Microcontroller: Microchip / Atmel ATmega328P-PU in 28-Pin DIP Socket (@ 16 MHz Quartz Crystal)
- USB-to-TTL Serial IC: WCH CH340G
- Operating Logic Voltage: 5.0V DC
- External Input Voltage (DC Jack / VIN): 7.0V to 12.0V DC Recommended (Up to 20V Peak via 78M05 Regulator)
- Digital I/O Pins: 14 Pins (D0–D13, including 6 PWM Outputs on D3, D5, D6, D9, D10, D11)
- Analog Input Pins: 6 Channels (A0–A5, 10-Bit ADC Resolution)
- Memory: 32 KB Flash (0.5 KB Bootloader), 2 KB SRAM, 1 KB EEPROM
- DC Current per I/O Pin: 20 mA Typical (40 mA Max)
Mechanical Specifications:
- PCB Substrate: High-Visibility Double-Sided FR-4 Fiberglass PCB
- IC Socket: Dual-Wipe 28-Pin 300-mil DIP Socket
- Connectors: Standard USB Type-B Port, 5.5mm × 2.1mm DC Barrel Jack, 6-Pin ICSP Header
Dimensions:
- Length: 68.6 mm
- Width: 53.4 mm
- Height: 15.0 mm
- Weight: ≈ 28 g
Pinout and Wiring:
- Digital Bank (D0–D13): `D0 (RX)`, `D1 (TX)`, `D2/D3` (External Interrupts INT0/INT1), `D3/D5/D6/D9/D10/D11` (PWM), and `D10–D13` (SPI).
- Analog Bank (A0–A5): 6 analog inputs (0–5V); `A4 (SDA)` and `A5 (SCL)` double as the hardware I2C bus (also routed to the top-left `SDA/SCL` pins).
- Power Bank (`VIN, GND, 5V, 3.3V, RESET, IOREF`): Regulated 5V and 3.3V outputs plus external `VIN` input.
- Engineering Precaution: When removing and reinserting the 28-pin DIP ATmega328P-PU chip, always align the semicircular notch on the end of the IC with the notch on the 28-pin socket pointing toward the USB-B/reset corner; inserting the chip backward will destroy the MCU on power-up.
Datasheet Reference:
Commonly Used in:
- Engineering College & School STEM Electronics Laboratories
- Standalone ATmega328P-PU Breadboard Chip Flashing & Prototyping
- Autonomous Line-Follower Robots, Smart Irrigation Controllers, and CNC Plotters
Applications:
- DIP Chip Programmer & Test Bench: Flash your compiled sketch onto the socketed ATmega328P-PU, then pop the chip out to embed it in a permanent custom PCB with a 16 MHz crystal.
- Student-Proof Lab Hardware: Minimizes lab maintenance costs since blown I/O pins only require swapping a low-cost DIP-28 chip.
- Modular Shield Stacking: Accepts L293D motor shields, 1602 LCD keypad shields, and CNC V3 shields directly.
Equivalent Models:
- Arduino UNO R3 ATmega328P ATmega16U2 Board: Uses an ATmega16U2 USB interface chip that requires no external CH340 driver installation.
- Arduino UNO R3 with USB Type-C Interface: Surface-mount ATmega328P variant with a modern reversible USB Type-C port.
- Arduino Nano V3.0 (ATmega328P CH340): Breadboard-friendly miniature version of the same ATmega328P + CH340 circuit adding extra analog inputs A6 and A7.
Package Includes:
- 1 × Arduino Compatible UNO R3 DIP ATmega328P-PU CH340G Development Board
working good
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Nice Product. Equivalent to Original…. Amazing
It is really good product, supported up to 24 V input, good PCB quality and look, i suggest to buy it now
Nice product at this price.
Works flawlessly.
it’s cost effective and also it is a made in india product, it is working amazing for me.
Nice product and nice packaging at this price
We love 24v input supply. very useful for industrial use.
Better than SMD arduino. you can change IC in case of any issue.
Good
Good Quality
Arduino Board working very Good and service of solving query from ifuture 👍
Their customer care service has given me a very good experience. I error future customer care fixed an error in the order due to my error. Order placed. Let me know after the next feedback product arrives