Introducing JeonLab mini v1.0

Finally the first version of the JeonLab mini PCBs have been delivered.  Excited, I quickly assembled one.  More practical applications will be demonstrated soon.

JeonLab mini v1.0 assembled 2

from another angle… JeonLab mini v1.0 assembled

PCB fits well in a small (43.73mm x 35.00mm x 11.00mm) Hammond box. JeonLab mini v1.0 PCB in a bluebox

JeonLab mini v1.0 features:

  • ‘mini’ means minimal
  • 28-pin DIP ATmega328P with Arduino bootloader
  • Digital pins from 2 to 13 are arranged on one side
  • Analog pins from 0 to 5 are arranged on the other side along with the FTDI-USB connector for an external FTDI breakout board (e.g. from Sparkfun, Adafruit)
  • There is no reset switch, but header pins for RESET and GND are provided
  • A power LED and #13 LED
  • A 0.1uF capacitor for the auto-reset when uploading a sketch
  • Headers for power inlet (+5V and GND)
  • Small enough to fit in a small plastic box (Hammond 1551F, Digi-Key, or Mouser)


  • JeonLab mini v1.0 PCB x1
  • ATmega328p with Arduino bootloader x1
  • 28pin DIP socket x1
  • 3mm red LED x1
  • 3mm green LED x1
  • 10k ohm resistor x1
  • 1k ohm resistor x2 (replaced for 330 ohm resistors for LEDs)
  • 0.1uF ceramic capacitor x2
  • 14pin male header x1
  • 1pin male header x1 (for reset pin)

If you are interested in buying it, please visit my shop page for detail.

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