AVR SD Dev Board

After over 35 years of development and helping other designers and engineers, The Workbench site will be closing due to age and retirement of members. Sales of certain items in stock will continue until depleted. The basic site will remain open for some time for item documentation. If you have any special request please email.

Support Files

User supplied notes

E-mail for more information

Classified Section Items Available

If you have any projects that you would like displayed, please send E-mail


Shown assembled with an SD card (card  not included )

The 3.3v AVR_SD3 development board includes an AVR163L (or optional Mega32L ). The SD socket can also use MMC cards. Includes a standard DB9 RS232 connector for I/O.The AVC mcu can be programmed ‘in-circuit’ by using one of Atmel’s ISP programmers. All the AVR pins are available at (standard 0.1” spacing).


The AVR_SD3 is a very compact 3.3v AVR controller board with an SD/MMC card socket. It can work with most 40 pin AVR-L mcus such as the  can use a Mega323L, Mega163L, Mega16L, Mega32L or a AT90LS8535 .Other “L” series AVRs can also be used with 40 pin carrier boards. The board has a standard Atmel 6 pin ISP programming header. It can be programmed using Atmels serial ISP hardware which is also compatible with the BascomAVR compiler. The board has a Max3232 RS232 IC, an I2C eeprom, 4mhz resonator, 3.3v Regulator, and a reset switch.


AVRSD Printed circuit board and the lay out.

Kit documentation

All Rights Reserved, Copyright (c) COMPSys , 2018

Updated on:

February 16, 2018 

Windows is a registered trademark of Microsoft Corporation. PICMicro is a registered trademark of Microchip Inc.

AVR is a registered trademark of Atmel Corp., MAX is the trademark of Maxim Corporation