For sale are new-made reproductions of the Ohio Scientific 495 prototyping board. These boards were produced from 4000 DPI scans of an original Ohio Scientific 495 board and are 1:1 with respect to trace and hole placement. They were run on standard thickness FR4 stock, which is thicker than original OSI stock, to reduce the excessive flex experienced with original Ohio Scientific products.

These boards have been scanned and reproduced as part of the Ohio Scientific Preservation Project. Full documentation is available in PDF format online. You can learn more about the OSI Preservation Project at http://osiweb.org or http://www.glitchwrks.com/osi -- please join the OSIweb forums! See our other listings for more reproduction and newly designed Ohio Scientific boards!

The OSI 495 is a single-sided prototyping board supporting DIP pattern ICs. It's a no-frills board, but due to the large size, it's still pretty easy to prototype whatever you're working on! You can read about the process of reproducing this board here:

https://www.glitchwrks.com/2016/04/22/cloning-the-495