This is PCB to build a 2532 to 2732 Adapter for an EPROM Programmer

It solves two problems that many EPROM Programmers suffer from:
It was designed to fit on a TL866 type programmer but should work with any programmer capable of programming 2732 but not 2532 EPROM's.

The rotary switch is used to select between 2716, 2732 or 2532 EPROMs and the toggle switch to select between using the Programmer supplied Vpp or onboard generated 25V (when using the generated 25V Vpp the programmer must provide a nominal 21V Vpp to switch in the 25V Vpp).

The board is powered from 5V which can be taken from the USB line communicating with the programmer, this is passed through the PCB (see photo 3).

I have a range of Acorn replica or compatible PCBs available, mainly for the early Acorn System Computers range but also for the later Atom, BBC and Master computers as well as many Econet components and some early SC/MP based items e.g. the MK14 Computer.

Not all of these boards will be in stock, if you wish to buy an out of stock board drop me an email and I will reorder.

Further details can be found on my website, including the Schematics and BOMs (Bill Of Materials).though you'll have to search for it because I can't put a link here - try 'acorn system computers website'.

I will combine postage on multiple items, please ask for a total before paying as I cannot combine postage after you have paid !