A2CDVI v2.5

Name: A2CDVI v2.5
SKU: 38900
Price: 35.00 USD
Availability: InStock
Rating: 3.95 (5 reviews)

(5 Reviews)

A2CDVI - Digital Video output for Apple IIc and IIc+

Designed by MrTechGadget's Gadgets in United States of America

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A2CDVI - Digital Video output for Apple IIc and IIc+

What is it? This is a small digital video adapter that plugs into the video port on the back of the Apple IIc or Apple IIc+, and now supports the Laser 128 as well. It runs Mike Neil's A2CDVI firmwar…

What is it?

This is a small digital video adapter that plugs into the video port on the back of the Apple IIc or Apple IIc+, and now supports the Laser 128 as well. It runs Mike Neil's A2CDVI firmware which the RP2040 microcontroller uses to convert the various video signals to reconstruct the video output in TDMS format. It outputs video to a monitor using the DVI format via an HDMI connector and supports 720x480p or 640x480p resolution.

Now shipping version 2.5 that supports all of the features in v1.8.3 of Mike’s firmware, including Laser 128 support, and expands compatibility to HDTVs in addition to monitors.

Why did you make it?

I made it because Mike's adapter board schematic for the A2DVI card works but it is really big and great for tinkering but not a good portable solution. This makes it very small and eliminates the extra unused chips from the A2DVI.

What makes it special?

This is a new and very inexpensive open source solution to output video from the Apple IIc and IIc+ to modern monitors. This design is open source itself and open hardware.

What do I get with this order

You will receive a completed, flashed and tested board, installed in a 3D printed case and shipped in an antistatic bag. I hand test each board in my Apple IIc before shipping.

Video Reviews

Javier Rivera of 8bitstuff.com recently reviewed this and designed a lovely 3D printed case for it. Watch his video here

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Quantity	Price
1	$35.00
2+	$33.00

Review Breakdown

Average Ratings

Product: (3.40)

Documentation: (4.00)

Shipping: (4.60)

Communication: (3.80)

Didier | Dec. 21, 2025

Works perfectly!

Plugged it to my french Apple //c and french Sony TV... and WOW!!!
Image is nice and colors are wonderful!
Thank you!

Emmanuel | Dec. 16, 2025

Excellent

It is so far the best Apple 2C HDMI adapter ever done. It is true that the case does not work well, as it keeps falling very easily when there is some movement. I took it away and it sticks perfectly.

I tested both the color DVI and NTSC. It looks very good, but to give it 5 stars there could be a small improvement in the color pixels: when you have a black single pixel vertical line, with pure white to its left and to its right, this line should look pretty black, and the adapter shows it colored (ex the walls in Ultima). Same for single pixels (ex stars in Choplifter), every pixels looks more like a dim white slightly colored, when the A2CDVI adapter plots them full color.

I have no idea how possible or resource consuming it would be to make those adjustments, but it would definitely become 5 stars. But I am very satisfied regardless!
thank you
Emmanuel Castello

Francis | Oct. 19, 2025

good and bad

Doesn't work with all screens.
With an older 14-inch monitor, the monitor goes into standby mode after a few seconds.
What's more annoying is the thickness of the case, which prevents the adapter from being properly inserted and held in place in the DB19 connector.
A slightest shock separates it.
The holes for the fixing screws are missing

Response from MrTechGadget's Gadgets | Oct. 22, 2025

The default video out resolution is 720x480, you might try changing it to 640x480 for your older 14" monitor.
Also, if you have access to a 3D printer, there is an updated case design that has better grip in the connector. https://github.com/MrTechGadget/A2C_DVI_SMD/tree/main/case

Jeff | Sept. 12, 2025

Product didn't work, fell out, shocked me

The product did not work. When I plugged it in it kept falling out repeatedly, it shocked me repeatedly with electrical shock and I also tried it on another machine as recommended by the seller. After multiple emails back and forth, the seller refuse to refund my money so I had to dispute with PayPal. BUYER BEWARE.

Chun Sang Johnson | Sept. 5, 2025

Excellent product for Apple IIc

Order placed smoothly, and thanks for the quick shipping, the package arrived safely. Really plug and work without any problem, highly recommended for anyone which own an Apple IIc!