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Mega Pro Mini - 3.3V

Description: Do you need "Mega" power in a "Mini" package? We can do that! We're continuing our Pro series of Arduino-compatible microcontrollers with the addition of the Mega Pro Mini. This is a 3.3V microcontroller running a version of the stk500v2 bootloader at 8MHz. In order to shrink the Mega Pro down to its minimum footprint, we've condensed the board layout, removed the barrel jack footprint and replaced the traditional Arduino-style headers with compact vertical JST connectors.

The Pro series is meant for users that understand the limitations of system voltage (3.3V), lack of connectors, and USB off board. This board connects directly to the FTDI Basic Breakout board and supports auto-reset.

Note: If you are using Arduino, modifications were made to the bootloader to support the 3.3V system, you will need to download and install a new board definition so that the Mega Pro can be programmed in the Arduino environment. The .zip archive below contains all of the files that you'll need including a "readme" file with simple instructions for how to install them. OR you can use Wiring and not worry about this since the board is officially supported.

Features:

ATmega2560 running at 8MHz external resonator
Low-voltage board needs no interfacing circuitry to popular 3.3V devices and modules (GPS, Accelerometers, sensors, etc)
USB connection off board
3.3V regulator
Over current protected
Reverse polarity protected
Resettable fuse prevents damage to board in case of short

Documents:

Pricing

images are CC BY-NC-SA 3.0

ASCII version

Comments 15 comments

green47 | about 7 months ago 2

this looks great, way to shrink down the footprint
salsa | about 7 months ago 1

Cool small board! But why $20 more than the Mega Pro 3.3V? Are those JST headers very expensive?
- RobertC. | about 7 months ago * 2
  
  They are, and it takes more time to populate, etc.
  - TLAlexander | about 7 months ago 1
    
    Have you guys had a look at Hirose DF-13 connectors? They are really great, we use ‘em at work.
Robomaniac | about 7 months ago 1

You should put the JST mini cable link into the description. http://www.sparkfun.com/products/10853
AngusP | about 7 months ago 1

I always get so exited when I see connectors that look like SATA ones… but they never are… :–(
dwc309 | about 7 months ago 1

Is it possible to boost the speed of the processor up to 16MHz?
- a1ronzo | about 7 months ago 1
  
  Possible? Yes. Suggested? No. 8MHz is the max for an atmega2560V, see page 369 of the atmega2560v datasheet for more info.
miked13 | about 7 months ago 1

I prefer something like this for the mini it’s 5V not 3.3V though. Mega Cube
Member #228962 | about 6 months ago 1

Does anybody know of a PCB-mounted female component that mates with these male JST-SH headers?
SlyVixsky | about 5 months ago 1

My first thought: those are goinna be some interesting shield designs :)
JacquesKleynhans | about 3 months ago 1

Hi Guys.. Has anyone actually tried to upload a bootloader to this micro from within arduino IDE.. Because I tried but I am getting the following error:

***failed; avrdude: verification error, first mismatch at byte 0x0000 0xcf != 0x0f avrdude: verification error; content mismatch
JGuthridge | about 3 months ago 1

I can’t quite see well enough, but is the JST looking connector on the left side the same size and type as the connectors you offer on your LiPro batts?
- a1ronzo | about 3 months ago 1
  
  Yes. I’ve added some of the LiPos to the related items.
Member #314614 | about 2 months ago 1

Good night! This board should be powered by 3,7V LiPo battery? Thanks.