In cooperation with the developer of the Guzunty project, we are making this kit available at-cost as a public service to promote education, learning, and experimentation in electronics, digital logic and computer systems design.
This kit provides all the parts needed to build a Guzunty programmable
I/O expansion board for a Raspberry
Pi computer. Note that this is a set of unassembled parts
- assembly and soldering are required to build the working board.
Assembly is not difficult and requires only basic soldering tools
"surface mount" components are used in this kit, so soldering is
Online assembly, soldering, and testing instructions are provided at
bottom of this listing. Here is a photo of the assembled kit:
This kit is identical to that offered on the Guzunty site, but
for US customers will cost less with much shorter shipping times.
A Raspberry Pi computer is not included in this listing.
There are many reasons to use a Guzunty expansion board with your
Raspberry Pi computer:
- Protect the delicate GPIO pins of the Raspberry Pi computer
- Provide up to 30 additional input/output lines
- Offload the Raspberry Pi CPU for complex I/O tasks
- Learn about programmable logic
- Build fun and amazing hardware projects
Unlike the GPIO pins of the Raspberry Pi, the Guzunty I/O pins can
used with both 3.3V and 5V external devices. This makes interfacing
other digital electronics easy and with no risk of damage to the
Raspberry Pi. The Guzunty increases the number of total available
pins by up to 30. This opens up many more possible uses for your
Aside from adding up to 30 I/O lines, the Guzunty includes a CPLD
(Complex Programmable Logic Device). This allows Guzunty to perform
complex logic operations which would otherwise require large amounts
external hardware ("glue logic"), or burden the Raspberry Pi CPU by
implementing that logic in software. Complex logic operations can be
offloaded to the Guzunty and can run thousands of times faster than
equivalent software programs. This is particularly useful for
hardware that requires frequent repetitive operations (like
an LCD display).
The Guzunty CPLD can be reprogrammed any number of times for
projects. The Raspberry Pi itself (and freely downloaded software)
all you need to get started in the world of programmable logic.
General information on
General information on