BREADBOARDS??????

Forum 2005-2010 (read only) Hardware Interfacing
1

Thanks in advance for your replys and help!!

Is it possible to program the microprocessor chip on the board and then remove it, plug it into a breadboard, and use it in some circuitry to perform its loaded code? I would love to be able to have several microprocessors, each coded differently, connected in some overly complicated circuity! If so what types of ICs can be programed? I hope my question makes sense :-/

Thanks again!!
-Isaac

2

Yes. A near FAQ around these here parts.

http://blog.makezine.com/archive/2007/07/barebones_arduino_on_a_br.html

That was a top hit from Google.

3

Yes for the arduino system it is certainly possible to preprogram a sketch into the chip while it's in the arduino board, then remove the chip to a breadboard. The only support the chip will need on the breadboard is a pull up resistor for the reset pin and a crystal or resonator.

There are several clone arduino suppliers that have made modules that plug into a breadboard and that would save you having to change chips.
http://store.fundamentallogic.com/ecom/index.php?main_page=product_info&cPath=2&products_id=28

Lefty

4

Great! With my Duemilanove, can I program the onboard ATMEGA168, and remove it to a breadboard? Will I still only need the supporting pull-up and crystal?

-Isaac

5

"Will I still only need the supporting pull-up and crystal?"

If you use a crystal you need two caps, however the three termial resonator has caps internal. You may want a small push button reset switch, however just power off and on the breadboard will restart the program. Of course your breadboard needs to have a good regulated 5vdc power source for the micro and it's good practice to install a small .1mfd cap between the +5vdc pin and ground mounted close to the micro chip.

Here is a module I bought recently that mounts to a breadboard but has the minimum needed support parts. It comes with a 168 chip with the arduino bootloader already in it. It saves some breadboarding wiring and makes the module more portable. Well worth $10.

http://store.fundamentallogic.com/ecom/index.php?main_page=product_info&cPath=15&products_id=29

Lefty

6

I`ve built and tested my atmega168 chip up design.

I was surprised how easy it was to get it working, with only 1 resistor and switch , 2 x 22ph caps and a 16 mhz crystal.

The only problem is, if you need to do any modifications, you need to remove the chip each time, or find to reprogram it in your design.

I`m having a problem trying to find a 6 pin box socket, so I can program onboard.

7

I`m having a problem trying to find a 6 pin box socket

I've used Farnell part number 109-6984, which is a 6-way header with a polarising "box" around it. I like to always have polarised connectors, to avoid that accidental but fatal reversal. They're made by Harting, manufacturer's part number 0918 506 7324. 66p each.

8

thanks for that .

I`ve looked everywhere and could not find them.