Atmel AVR development Atmega32 kit (Eta32mini)
The Eta32mini is a compact AVR development platform tailored for students, beginners and recent engineering graduates, streamlining the creation and testing of ATmega32-based microcontroller projects. By integrating the core peripherals such as a 2×16 character LCD, a 4×4 matrix keypad, serial interface and a CH340-based USB virtual COM port the board removes the burdensome task of discrete hardware design and allows developers to concentrate purely on firmware.
All microcontroller I/O lines are exposed via convenient pin headers for direct access, and the on-board power section accepts 12–20 V DC, producing a regulated 5 V supply with reverse-polarity and over-current protection. Pre-flashed with a UART bootloader, the Eta32mini supports programming through its custom IDE or, if preferred, the Arduino environment; an ICSP header also permits use of external AVR programmers. Safety and reliability are enhanced by features such as a reset switch, crystal oscillator, multi-turn analog input potentiometer and on-board fuse.
Whether you’re learning to interface displays and keypads, experimenting with relay and buzzer control, or exploring serial communications, the Eta32mini offers a ready-to-use, all-in-one solution that accelerates development cycles and builds a solid foundation in embedded systems.
Features:
- Power supply unit with on/off switch, 7805 regulator and 1 A fuse.
- ATmega32 microcontroller (44-pin TQFP) with reset switch and 16 MHz crystal.
- 4×4 matrix keypad (configurable as four direct switches).
- Output unit: three LEDs, two relays (5 V coil, 5 A contacts) and one buzzer.
- Multiplexed two-digit 7-segment display.
- 2×16 character LCD with contrast control.
- Variable analog input via high-precision multi-turn resistor.
- USB virtual COM port (CH340).
- Standard 6-pin ICSP header for external programming.
- All MCU I/O pins accessible via pin headers.
Eta32mini Kit Schematic:
Specifications:
| Specification | Details |
|---|---|
| Microcontroller: | ATmega32A, 44-pin TQFP package, 16 MHz crystal oscillator |
| Operating Voltage: | 5 V regulated output (7805, ±5%), input 12–20 V DC via socket |
| Protection: | 1 A fuse, reverse-polarity protection; green LED power indicator |
| USB Interface: | CH340 USB-to-TTL converter providing a virtual COM port; switch-selectable |
| Programming: | On-board UART bootloader (Eta32mini IDE), Arduino IDE compatible; 6-pin ICSP header for external programmers |
| Display: | 2×16 character LCD in 4-bit mode (contrast via 10 KΩ potentiometer) |
| Keypad: | 4×4 matrix keypad (or 4 direct switches) with pull-up resistors; jumper-selectable mode |
| 7-Segment: | Dual-digit, common-cathode multiplexed display via PORTA & Port B |
| Analog Input: | Multi-turn 10 KΩ potentiometer (0–5 V) on PA0/A0 |
| Output Units: | Three LEDs (PC0–PC2), two relays (PC3–PC4), one buzzer on PC5 |
Applications:
- Relay Control Application.
- LED Control (Red, Green, Blue).
- 7-Segment Display Counter.
- Analog Voltage Measurement on LCD.
- Serial Communication Display on LCD.
Package Contents:
- 1x ETA32 mini Mainboard
- 1x USBasp AVR Programmer
- 1x Cables
Datasheet:
- Download User Manual (Download)
- Firmware (Download)
- Software (Download)
