EPROM Programmer Project for 27c801

Overview

Producing a simple and cheap EPROM burner built on veroboard is the objective of this project which supports the 27c801.

Explanation

Marking and cutting the veroboard is the first step in the assembly of the programmer. It is a thin fiberglass or SRBP board with 0.1 inch apart holes and linking the holes on one side of the board with copper tracks which allows quick and easy circuit connections. A piece of board 39 tracks wide with 30 holes per track is used to build the burner. The holes and tracks are marked with numbers and letters to know where the components will be mounted.

The addition of components starts with the power supply. A 12V universal unregulated mains adaptor is used to power the burner. Before feeding it to the ICs on board the burner, the supply has to be smoothed and regulated. A 470uF electrolytic capacitor is added to smooth out the rough output of the mains adaptor.

The 4040 ICs, the EPROM socket, and the several connections between them, comprise the logic section. A socket to the board is used in order to easily insert the chip and avoid damaging them.