The HP 11456A Read Out Test Card is a nifty little test board that plugs into the HP 3470 series display modules. I really wish that I had had one of these, before I started working on my faulty HP 34740A display module.

Barbouri's Electronics Projects
Restoring vintage electronics along with designing and building new circuits. One eye looking into the past, the other looking into the future.
The HP 11456A Read Out Test Card is a nifty little test board that plugs into the HP 3470 series display modules. I really wish that I had had one of these, before I started working on my faulty HP 34740A display module.
As mentioned in a previous post on the Hewlett Packard 34702A Multimeter module, I have been looking for a 34740A display module to pair with it. I was lucky to find a module that was in a good cosmetic condition and untested for a reasonable price.
Building a new interface board for use with Newhaven Display “Slim OLED Character Displays” using an I2C interface, with extras.