Leonardino pictures!

Using Arduino Microcontrollers
#1

My Leonardino (little Leonardo) boards are in! They look sharp, these pictures hardly do them justice.
Guess I need to order some parts now.
fm has spoken for two, others are first come, first serve, I have 20 total. I’ll be cutting the boards apart for you, just a few seconds with a hacksaw.
Boards should bootload & accept sketches under 1.0 same as a Leonardo. uSD card will need to be checked using fat16lib SD library.
eagle files are here.
parts are pretty generic, 0805 size Rs & Cs. Part values are on the schematic.
http://www.crossroadsfencing.com/BobuinoRev17/Atmega32U4_H49xtal_uSD_RevA.5.sch
http://www.crossroadsfencing.com/BobuinoRev17/Atmega32U4_H49xtal_uSD_RevA.5.brd

pm me if interested, $3 a board mailed in an envelope, international might be a little more.

Robert
Leonardino_bottom.jpgLeonardino_top.jpg
Leonardino_sch.png

#2

Very nice board!

#3

Thanks! Now just time to play with it- bet fm gets one going before I do.

#4

CrossRoads:
Thanks! Now just time to play with it- bet fm gets one going before I do.

Always good to have beta testers!

#5

CrossRoads:
Thanks! Now just time to play with it- bet fm gets one going before I do.

Do you have the BOM for this?

#6

No BOM yet, I’ll make one up from eagle’s Export Parts List and add some digikey or mouser part #s to go with it.

#7

Here's a Digikey P/N PL for the Bobuino.
http://www.crossroadsfencing.com/BobuinoRev17/Leonardino_parts_list.xls

#8

I noticed you put a 3.3V regulator but provided no way to switch the entire MCU to run on 3.3V, may I suggest a simple 2 way solder jumper to make this a configurable option? The Teensy has this option.

#9

I looked up Europe shipping prices. Looks like $2.
So, boards shipped to US location, $2.50 each.
Boards shipped Internationally, $3.50 each.
PM me your address, paypal funds to cardinalflyer at comcast dot net

I have 20 boards, about 5 6 requested so far.
Can order more in February if there is enough interest.

Powering the uC from 3.3V- yeah, that didn’t occur to me or anyone else who reviewed this. Wasn’t considering <16 MHz operation.
Leave off the polyfuse, connect 3.3V to 5V using the header pins.

Robert

#10

electronic $$$ on their way through the aether!

#11

CrossRoads:
Here's a Digikey P/N PL for the Bobuino.
http://www.crossroadsfencing.com/BobuinoRev17/Leonardino_parts_list.xls

I noticed you did not include 22pF capacitors for the Crystal 16MHz

Edited: C1 & C3 should be 22pF and not 100nF

#12

Thanks Bill, will fix that when I get home.
Looks like I never had the right value on the schematic! Will fix that too.

#13

Okay, corrected the PL & schematic to show 22pF caps to go with the crystal.

1876×946 27.4 KB

http://www.crossroadsfencing.com/BobuinoRev17/Leonardino_parts_list.xls

#14

Allright, we've mailed out 8, 6 more going out today, of the initial batch of 20 PCBs. They should be received by most already.
I'll order some more if these turn out to be useful.

#15