27 replies to this topic

[Juzzer]

@Frode - it's on the todo list..

 

@Chris - they are cool little chips - running 4.3.1 it has 38kb free ram

[Frode]

Chris, is that screenshot from the start of an Netduino Mini 2?

[Chris Walker]

Hi Frode,

Not a Netduino Mini 2 (although we're searching for a micro for a potential NM2); Netduino Mini is pretty beloved by a lot of people, so it will be a tough act to follow.

This particular screen grab is from the top layer of a NETMF-powered device we've been working on for three years now. It has been a massive project, and we're pretty excited to see it heading out for certifications. Its launch is a collaboration with another major "maker" company.

A fun tease: you can plug this particular device into your Netduino (two NETMF brains working in concert?)...and it will work great with the new Netduino SDK for Azure.

Chris

[Frode]

Juzzer or Cys, would you mind sharing the schematics for those boards? I'm interrested in making one myself.

[Juzzer]

@Frode happy to - Can you read Altium files or do you need a PDF? 

Ping me an email - justin at ingenuitymicro dot com

[Frode]

Hi Juzzer - I can only read PDF. I'll email you!

[cys]

Below is the schematic for my homebrew mini2 in case anyone finds it useful. My design criteria were: I) incorporation of an STM32Fx chip to allow usage of the netduino 2/netduino plus 2 firmware, and II) all pins compatible with my dive computer/rebreather controller project pcb & associated parts developed with the netduino mini. Through the iterations I've had to solve a USB cable grounding issue and shuffle pins around several times to get backwards compatibility. The last iteration I left pins 2, 3 and 22 disconnected because I had everything I needed elsewhere and wanted to save a little time routing. I just finished chasing down a side effect bug with my 24 bit ADC. The HB mini2 v1.10 has been robust so far, and both the HB mini2 and the netduino mini are now interchangeable on my project pcb. 

 

homebrew_mini2 by cys1, on Flickr

[cys]

The homebrew_mini2 board is now a shared project at Osh Park. You can build your own HB_mini2 by ordering the board, here.

 

The parts list is as follows:

 

   z1/z2/z3 TVS diode 12vwm 250vc 0402 F2862CT-ND

 

   CONN USB MICRO B RECPT SMT R/A 609-4613-1-ND

 

   C7 CAP TANT 10UF 10V 20% 0603 718-1673-1-ND

 

   CONN IC SOCKET 24 POS DIP 30AU A35058-ND

 

   F1 PTC RESETTABLE 6V, .500A SMD 0805 F2772CT-ND

 

   Y1 CRYSTAL 25MHZ 18PF SMD 535-9128-1-ND

 

   IC1 IC REG LDO 5V .8A 8SOIC MC33269D-5.0GOS- ND

 

   IC2 IC REG LDO 3.3V 0.5A TSOT23-5 576-1910-1-ND

 

   ICU IC MCU 32BIT 1MB FLASH 64LQFP 497-11767-ND

 

   SWITCH TACTILE SPST-NO 0.05A 12V SW1104CT- ND

 

   7 x C 100n 0402

 

   3 x C 2u2 0402

 

   2 x C 18 pF 0402

 

   1 x C 1 uF 0402

 

   2 x R 40K 0402

 

   2 x R 22R 0402