Arduino Mega 2560
by Arduino / clone
SKU: PSA-CMP-MEGA
No reviews yetTypical India street price
₹700–₹1,600
More pins and memory for 3D printers, CNC, and multi-sensor robots.
Interface: Many GPIO, 4× UART, I2C, SPI
Use when UNO runs out of pins or serial ports.
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Concept
Arduino Mega 2560 is a larger AVR when UNO runs out of pins or flash — common for 3D-printer shields, CNC, and multi-sensor robots.
A little theory
ATmega2560 offers 256 KB flash, 8 KB SRAM, 54 digital pins, 16 analog inputs, and four hardware UARTs. Logic is still 5 V CMOS like UNO. Extra serial ports (Serial1–3) leave USB Serial free for debug while GPS/GSM use other UARTs. Pin current limits are similar; never exceed regulator/USB budget for motors. In the classroom, treat Arduino Mega 2560 as a intermediate part using Many GPIO, 4× UART, I2C, SPI. Typical India street price is about ₹700–₹1600. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
Program exactly like UNO (Board → Mega 2560). Map shields carefully — RAMPS and CNC shields expect Mega pinouts.
Classroom & project use
- RAMPS 3D printer
- Large sensor arrays
- Multi-motor robots
- CNC / plotter controllers
Buying in India
Precautions
- Heavier current draw — use a solid 7–12 V barrel supply
- CH340 clones need drivers
- Do not power motors from the board 5 V pin
Specifications
| MCU | ATmega2560 |
| Flash | 256 KB |
| Digital pins | 54 |
| Analog pins | 16 |
| Logic | 5V |
| Category | Microcontrollers |
| Difficulty | Intermediate |
| Voltage | 5V |
| Interface | Many GPIO, 4× UART, I2C, SPI |
Pinout
D0–D53 digital (many PWM) A0–A15 analog Serial: 0/1 (USB), 19/18, 17/16, 15/14 I2C: 20/21 SPI: 50–53
