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Topic: What kind of board/shield do you guys want? (Read 6193 times) previous topic - next topic

RuggedCircuits


External memory for the Arduino Mega...



Ask and ye shall receive!

http://ruggedcircuits.com/html/megaram.html

--
The Basic Motor Driver: simple, inexpensive motor driver for 1 stepper motor or 2 DC motors

retrolefty

Wow, that should open up some new possiblites for Arduino applications. Nice job.

Lefty


Robotdude




External memory for the Arduino Mega...



Ask and ye shall receive!

http://ruggedcircuits.com/html/megaram.html

--
The Basic Motor Driver: simple, inexpensive motor driver for 1 stepper motor or 2 DC motors



Awesome work. :) Hope this inspires more people to use the external bus. :)
Eu não sou o teu criado. Se respondo no fórum é para ajudar todos mediante a minha disponibilidade e disposição. Responder por mensagem pessoal iria contra o propósito do fórum e por isso evito-o.
Se realmente pretendes que eu te ajude por mensagem pessoal, então podemos chegar a um acordo e contrato onde me pagas pela ajuda que eu fornecer e poderás então definir os termos de confidencialidade do meu serviço. De forma contrária toda e qualquer ajuda que eu der tem de ser visível a todos os participantes do fórum (será boa ideia, veres o significado da palavra fórum).
Nota também que eu não me responsabilizo por parvoíces escritas neste espaço pelo que se vais seguir algo dito por mim, entende que o farás por tua conta e risco.

Dito isto, mensagens pessoais só se forem pessoais, ou seja, se já interagimos de alguma forma no passado ou se me pretendes convidar para uma churrascada com cerveja (paga por ti, obviamente).


robtillaart

Quote
I'm new here, I willing to design and build some custom arduino pcbs.

And,  allready building something?


Yet another idea: Dual drive shield
- 2 SDCards
- 2 disable switches - NONE, A, B, AB/BOTH - (disconnect the SS pins)
- 2 LEDs to indicate active
-

Goal: replace one while the data is written on the other one - hot swappable discs

Possible other use:
- speed up logging by writing alternating to the disks ?
- ....
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

liudr

I've heard about the sd card library being slow. What is the reason? I thought sd cards on PCs are decent speed. You can't expect sd card to be as fast as hard drives, right? Will it help to have a dedicated MCU to operate sd card on a shield so the arduino can just dump data and move on to the next task while the MCU processes all the sd card IO?

billcramer07

Maybe this is too far out in left field but I would like to see a UNO type board with a mega2560 on it. Make the 3 serial ports available thru a right angle header on the edge of the board. A4 & A5 would become a dedicated I2c bus. Change the ICSP pins to match the 2560 pins. I don't need lots of I/O but I do need serial ports. Software serial is not a good option...

just an idea.

extent


I've heard about the sd card library being slow. What is the reason? I thought sd cards on PCs are decent speed.


PCs talk to SD cards via a 4bit parallel protocol which is well supported and performs well.  Arduino projects tend to use the serial interface which apparently can vary quite a bit in performance from it's parallel counterpart.  Not helped at all by the fact that the Atmega can't clock as fast as a SD card is capable of.

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