7 models
HP7475A plotter pens are meanwhile unobtainium. So I made a replacement based on an available refill cartridge for a ballpoint pen (Schneider Universal 852), available at your stationary's or Amazon. See enclosed PDF (other files) for…
Normal single pin test probes are difficult to fix at DIL Ics which are soldered in. These 14 to 40 pin probe are mounted on an IC and give excellent access to measuring with an oscilloscope or a logic analyzer. As visible on the…
For prototyping of circuits on a thruhole breadboard (picture 3), usually one solders IC sockets into it and connects the pins with enamelled copper wires (such as in picture 3) which leads to quite a mess. Better is it to use combs to…
Digitast refers to a momentary switch formerly used in keyboard matrices for single board computers. The are now rare and expensive. I made a replacement for them for own projects. See enclosed PDF on how to produce it.
As always, it's the small things that decide about usability. For my recently acquired old HP7475 plotter from the 80s, the rubber wheels to move the paper vertically were dried out and had no longer enough grip. Also, the Geneva drive…
AWSW's WordClock (see https://www.printables.com/model/1125181-wordclock-16x16-2025) is a great gadget for your home. I really appreciate it. But it is - as usually - the small things that make things better: In this case, the power USB…
Usually it is the small parts that are helpful. I have a large set of small parts, like screws and electronic parts in sorter boxes (see one of the pictures of this wall. Recently, when moving, I needed to fix these boxes to the wall.…
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