SparkFun Electronics - 28 Pin AVR Development Board

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28 Pin AVR Development Board

sku: DEV-00029

Description: Prototype board for 28 pin AVR microcontrollers with with power supply circuit, crystal oscillator circuit, RS232 port, reset IC, status LED, and 10 pin STK ICSP port.

Freatures:

STK200 compatible ICSP 5x2 pin connector for in-circuit programming with AVR-PG1 or AVR-PG2
RS232 Tx, Rx interface with MAX232 IC on socket
8 MHz crystal on socket (user replacable)
Reset IC ZM33064
Reset button
General purpose push button
Status LED connected to PC5 via removable jumper
DIL28 microcontroller socket
Power plug-in jack
Selectable +3.3V / +5V power supply voltage regulator
Extension pin headers for each uC pin
Four mounting holes 3.3 mm (0.13")
GND bus
Vcc bus

Dimensions: 100x80 mm (3.9x3.15")
Documents:

Board does not come with AVR installed. Please see a list of related items below.

Pricing

	48 in stock backorder allowed

$16.95	price
$15.26	10-99 (10% off)
$13.56	100+ (20% off)

	quantity

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Comments

9 comments

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	by TheTrustedOne +0.45 \| Dec 10, 2008 at 7:47am 0
Does anyone know if this board supports all 28 pin AVR's?

	by VoidMain +5.2 \| Apr 8, 2009 at 9:58pm 0
From the PDF labeled avr-p28b.pdf listed above the comments: Supported devices: AT90S2333, AT90LS2333, AT90S4433, AT90LS4433, ATtiny28L, ATtiny28V microcontrollers.

	by timeblade0 +2.4 \| Jun 9, 2009 at 6:12pm 0
From the schematic, it looks like it should work for Atmega8. Any reason why it does not? I would love to use this for my Atmega8 projects.

Luceroz

+1.9

| Jul 29, 2009 at 7:51am

Holy CRAP! The Max232 is NOT wired to any pins of the avr by default.... I've been beating myself trying to get serial working on the board -- under the very stupid assumption that the max232 was already wired up. PLEASE DONT BE AS RETARTED AS ME.

On a related note, I can flash my atmega328's using an olimex parallel stk200 type programmer with ease on this board.
This is one of those all-too-familiar situations where I wonder if my brain is wired correctly.

	by Ian +1 \| Aug 11, 2009 at 9:49am 0
I may be missing something obvious (new to this stuff!) but... To use board in 3.3V mode (with the 3.3V jumper made) you have to disable U3 - low voltage detector (I just removed mine) otherwise it just holds the AVR in reset. Also, the schematics on this site and on Olimex site are different, and both are different to the board that I have received!!!

	by Michelle +2 \| Aug 24, 2009 at 12:28pm 0
any change of a usb version in the future?

	by acidblue +6.9 \| Dec 1, 2009 at 12:38pm 0
Has anyone been able to fit a zif socket on this board? It seems the jumper and resonator would be in the way. Also is this board compatible with the atmega 168 and 328? Was thinking of using this board upload boot-loaders into bare atmega chps.

Hobbles

+2.1

| Dec 3, 2009 at 11:03am

Luceroz: Holy CRAP! The Max232 is NOT wired to any pins of the avr by default.... I've been beating myself trying to get serial working on the board -- under the very stupid assumption that the max232 was already wired up. PLEASE DONT BE AS RETARTED AS ME. On a related note, I can flash my atmega328's using an olimex parallel stk200 type programmer with ease on this board. This is one of those all-too-familiar situations where I wonder if my brain is wired correctly.

Is that what was wrong man I gave up on mine cause I couldnt get mine to work.

	by AverageGuy +1 \| Feb 4, 2010 at 8:23am 0
AcidBlue. Did you ever acidblue: Has anyone been able to fit a zif socket on this board? It seems the jumper and resonator would be in the way. Also is this board compatible with the atmega 168 and 328? Was thinking of using this board upload boot-loaders into bare atmega chps. Have you tried it yet? I need to do the same thing and had the same idea.