Restoring vintage electronics along with designing and building new circuits. One eye looking into the past, the other looking into the future.
After using my last commercially made isolated TTL serial to USB converter for my last project, with no hopes of it being re-stocked in the near future. I decided to try building my own version of the device.
After five years and a few prototype revisions of the Version 2.12 Programmable Voltage reference, I decided it was time to update the project based on many requests and lessons learned from prototypes over the years.
After building the ASCII Video Terminal Kit, I decided to create an updated circuit board based on the original Geoff Graham ASCII Video Terminal project, which was then later updated by Peter Hizalev and sold on Tindie.
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.
When I purchased my HP 34750A Display module, it came with a somewhat beat-up 34702A Multimeter module. I was mainly interested in the display module to pair up with my existing HP 34703A module, but this is also an interesting module worthy of further exploration.
Continue reading “Hewlett Packard 34702A Multimeter Module”
Getting a HP 34750A display module for the HP 34703A DCV/DCA/Ohm Meter.
Continue reading “Hewlett Packard 34750A Display Module Repair”
Cleaning up and photographing a Hewlett Packard 34703A DCV/DCA/Ω Meter plugin section of a 3470 measurement system.
Continue reading “Hewlett Packard 34703A DCV/DCA/Ohm Meter”
I decided to build an ASCII VT100 video terminal to go with my Tauntek logic IC tester.
I came across “Geoff’s Projects” website where he describes an ASCII VT100 compatible video terminal that he built back in 2014. Since then several people have published updated versions of the video terminal with different features. I decided to check out an updated kit by Peter Hizalev.
I just finished a popular kit project used for testing 7400 series, and some 4000 series logic IC’s. It was recently featured in CuriousMarc’s YouTube channel titled “Viewer-designed, Tauntek TTL IC tester!”.
Continue reading “Building the Tauntek Logic IC Tester”
Restoring a Heathkit IT-11 Capacitor Checker for use at my local Makerspace.
Continue reading “Heathkit IT-11 Capacitor Checker Refurbishment”
Repairing a dead Tektronix TDS 340A Oscilloscope and making some modifications.
Continue reading “Tektronix TDS 340A Oscilloscope Repair”
Upgrading a Hewlett Packard / Agilent 6632B System DC Power Supply with front panel binding posts and correcting an original design error.
Continue reading “Hewlett Packard / Agilent 6632B Upgrade”Restoring a badly damaged late 1950’s analytical balance.
Building a light source for a Stanton Instruments, Ltd. B15 balance.
