8/18/2023 0 Comments Zprint z402 softwareHigh signal (30V) is used to drive both digit selector and segments. The decision was made to build my own LED display! Requirements: -Only discrete components allowed - not ICs -Mimic the look of the original VFD display -Low cost (as always) Original driver outputs 0-30V signals that drive VFD anodes. In addition I didn't like the way they changed display layout. Unfortunately there was no schematic or gerber files. broken After short research I have found Chinese project with LED replacement for VFD. No damaged capacitor, no visible short circuits, all ICs in place 2) TrueRMS & IEEE488 addons in great condition 3) Testpoints voltage in spec 4) VFD display. In order to remove the display and keypad I had to remove every PCB and cable. disassembly time! First impression was great but after some time I realised that the construction of 8840A is a nightmare. Internal condition was unknown at the time. Hello everyone! That will be my first topic here Few months ago I bought a broken Fluke 8840A in good (visual) condition for ~$50.
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