×

Hello and Welcome! If you have a technical question please check out our Forums. If you have an order or shipping question please refer to our Customer Support page. Please see all COVID-19 updates here and thank you for your continued support.

Alchitry Io Element Board

The Alchitry Io Element Board is the perfect way to get your feet wet with digital design. The Io features four 7-segment LEDs, five momentary push buttons, 24 basic LEDs, and 24 DIP switches that all lend themselves to fantastic beginner tutorials that will walk you through all the basics of FPGAs.

Alchitry Elements are expansion boards similar to shields for an Arduino or HATs for a Raspberry Pi but these are meant for your Au and Cu FPGA Development Boards. This Element is equipped with four connectors on the underside of the board that snap to an Au or Cu board. Be aware that the Io does not feature any connection points on the top of the board so you won't be able to stack any additional Elements on top of it.

  • 4x 7-segment LED digits
  • 5x momentary push buttons
  • 24x LEDs
  • 24x DIP switches

Alchitry Io Element Board Product Help and Resources

External IO and Metastability

July 30, 2020

Why external signals can cause metastability and how to use constraint files to manage this

How Does an FPGA Work?

July 30, 2020

The What, How, Why, and When of Field Programmable Gate Arrays, aka FPGAs

First FPGA Project - Getting Fancy with PWM

July 30, 2020

An initial project using Alchitry's onboard FPGA to manipulate PWM

Programming an FPGA

July 30, 2020

Come look at the basics of working with Field Programmable Gate Arrays.

Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

2 Electrical Prototyping

Skill Level: Rookie - You may be required to know a bit more about the component, such as orientation, or how to hook it up, in addition to power requirements. You will need to understand polarized components.
See all skill levels


Comments

Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • The push buttons and dip switches on the Io board aren't compatible with the Cu main board when stacked directly. The Io board switches and buttons connect the FPGA pin to VCC (through a resistor). The ice40 on the Cu main board doesn't have a pulldown option for the I/O buffer. Therefor, the state of the FPGA pins is either VCC or floating.

    There is a post on the Alchitry forums about this and they recommend swapping the pin between output low and input right before sampling it and hint that it might be fixed in a future revision.

    Another option is to use a Br board and some pulldown resistors, but it would be hard to fit them for all of the dip switches.

    • I realized I was looking at the schematic on the Alchitry website, which is for the old version of the board. However, on the new Sparkfun version, the pulldowns for the pushbuttons are in the wrong part of the circuit, and don't actually pull down the FPGA pin.

Customer Reviews

No reviews yet.