- All 32 I/O pins are lead out
- Suitable for ATmega 16 / ATmega 32 chipset
- Easy to replace crystal oscillator
- Powered by external power adapter (5.5 x 2.1mm plug) or pin header
- 4-CH VCC， GND
- Power-on reset and push button reset
- Power and program running LED indicator
- Standard ISP download port (not for power supply)
- Great for DIY