Compatible UNO R3 ATmega328P DIP — Full Compatibility, Replaceable Chip
⚠️
Important Note: This board is
compatible with the Arduino UNO R3 but is
not a genuine Arduino board. If you want the official, genuine board with full Arduino support, choose the
Arduino UNO Rev3 (A000066).
The Compatible UNO R3 ATmega328P (SKU: AA002) is functionally identical to the Arduino UNO R3: same ATmega328P microcontroller @ 16MHz, same R3 pinout, same full compatibility with Arduino IDE sketches, libraries, and shields. Its key advantage over the SMD version (AA003) is the DIP socket — the ATmega328P sits in a removable socket and can be easily replaced if it fails, at very low cost. An excellent choice for educational labs and projects where chip replaceability is a useful feature.
Technical Specifications
| Feature |
Specification |
| Microcontroller |
ATmega328P DIP (removable in socket) |
| Architecture |
AVR |
| Operating Voltage |
5V |
| Input Voltage (VIN) |
7–12V (recommended) / 6–20V (limit) |
| Clock Speed |
16 MHz |
| Flash / SRAM / EEPROM |
32 kB (0.5kB bootloader) / 2 kB / 1 kB |
| Digital I/O Pins |
14 (6 PWM) |
| Analog Input Pins |
6 |
| DC Current per I/O / 3.3V Pin |
20 mA / 50 mA |
| USB |
USB Type-B |
| Pinout |
Arduino UNO R3 — full shield compatibility |
| Dimensions / Weight |
68.6mm × 53.4mm / 25g |
DIP vs SMD — Which compatible version should I choose?
|
AA002 — DIP ATmega328P |
AA003 — SMD CH340 |
| Chip |
DIP socket — removable |
SMD — permanently soldered |
| Chip replacement |
✓ Easy, low cost |
✗ |
| USB chip |
ATmega16U2 (or similar) |
CH340 (driver required) |
| Arduino IDE |
✓ Full compatibility |
✓ Full compatibility |
| Best for |
Education, experimentation |
Budget prototyping, embedding |
Who is it for?
- Schools & educational institutions: The DIP socket is an educational advantage — students can physically see and understand the microcontroller. If a board is damaged during an experiment, you replace only the chip (low cost) rather than the entire board.
- Beginners experimenting: If you're worried about wiring mistakes that might damage the chip, the DIP version gives you a safety net — replace the ATmega328P at minimal cost, no soldering required.
- Makers & hobbyists: Ideal for projects where you want to leave the programmed chip in a custom circuit and reuse the board for another project. Full compatibility with shields, sensors, and modules.
See Also
Frequently Asked Questions
What does DIP mean and why is it useful?
DIP (Dual In-line Package) means the ATmega328P sits in a removable socket rather than being permanently soldered (SMD). If the chip fails or you want to replace it, simply pull it from the socket and insert a new one — no soldering, minimal cost.
Does it run the same code as the genuine Arduino UNO Rev3?
Yes, absolutely. The ATmega328P is the same microcontroller — all Arduino sketches, libraries, and tutorials work exactly the same. Select it in the Arduino IDE as "Arduino UNO".
What is the difference from the AA003 (SMD CH340) compatible board?
The AA002 has a DIP ATmega328P (removable) and a USB-B connector similar to the genuine UNO. The AA003 has an SMD chip (permanent) and a CH340 USB chip that requires a driver. Functionally they are identical — the choice depends on whether you want a replaceable chip or a lower price point.
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