Grundy Newbrain – Expansion Interface & Disk Controller Module – Disk Drives – Monitor.

This single block of 14 kg i think is a single piece and it was assembled and customized by J.G.M. Oude Nijhuis.

This single block contains the following things:

• Grundy Expansion Interface Module.
• Grundy Disk Controller Module.
• Disk Drives (2)
• Power supply with 3 independent outputs.
• Power Strip.
• Parallel Interface for Printer.
• Outputs and inputs for the Grundy Newbrain BUS, Power and Monitor.

The Monitor should be placed above the two Disk Drives and the size is perfect like the color of the case very similar to the rest, it adapts perfectly.

The external case with the two Floppy Drives and space for the Disk Controller Module should be the one sold by Tradecom International B.V.

Gallery:

12►

This is the Battery Pack for the Newbrain, very comfortable and very light :-D useful for taking the computer to the beach during the summer holidays.

Obviously the Battery Expansion Unit after many years of inactivity has presented some problems of the 20 x 1.2V 600mA NiCd batteries.

The batteries besides being completely exhausted i had leaked acid. (see photo)

Fortunately, there are no major damages with the leakage of acid and it was enough to clean well, unsolder the 20 batteries and replace them with new ones of 1000mA.

Last update: I noticed a malfunction of the Battery Expansion Unit, when i set the switch to OFF the “discharge” LED remained on.

Looking at the schematic, the switch suspend the charge and the use of batteries, the problem was caused by a pcb pad (see photo) that at first sight seemed to be connected together with another, immediately close, but in truth it was not so, it was enough isolate the connection and now everything works correctly.

Gallery:

12►