Close up of hall effect sensor including the die on both sides and the ceramic substrate

The keyboard has be modified to include a DM96L02 Dual Retriggerable Resettable Monostable Multivibrator to stretch the strobe pulse for use with the Transam Triton intel 8080 based computer. This chip is in the photo on the right in the blue IC holder there is also an extra three resistors and a capacitor placed near the blue IC holder.