I'm working on building a multi-system engine monitor that will output its data on a single gauge. It will display each type of data one at a time and cycle through from type to type every few seconds. So on a single gauge I can display multiple types of engine data, things voltage, amps, oil pressure, cylinder head temperature, hydraulic pressure, rpm, etc. So I need a gauge that can be driven by an Arduino or similar. I need the gauge to have a reconfigurable "normal" scale. And I need to display text that gives a description of what the gauge is currently showing. For the physical gauge itself I'll use a tachometer. It's fairly simple to drive a tach from an Arduino, using a Mosfet to output a 12V square wave pulsed signal. The tachometer reads that signal as pulses to the spark coil and moves the needle appropriately. This video is proof of that concept. Next the tachometer will need a new blank dial/face, with embedded RGB LED's across the top arc of the dial. These LED's will be lit up green/yellow/red to indicate the acceptable range of the current data type. Then I'll need a small textual display underneath the round gauge to tell the user what kind of display is currently being shown, and a brief indication of numbers what the range LED's are mapped to. Then all I have to do is figure out how to sense and read all the various data types and output them to the gauge on a rotating basis. ... https://www.youtube.com/watch?v=KQ9CtKHzyOs

Revisiting the $40 DIY electrified shop press. How is it working 6 months later? ... https://www.youtube.com/watch?v=t7Cstf8p50A

Documenting the process to create addon/accessory/removable large dials for the cross-slide for an antique (small dials) South Bend Heavy 10 lathe. Covers lathe history, materials sourcing, diy lathe chuck indexing, building a jig for accurate number stamping, and general machining ... https://www.youtube.com/watch?v=0luFmRdBHoo

Shop Hacks: How to add electric power to any manual shop press that is based on a bottle jack, using an airless paint sprayer as the hydraulic pump. Includes a discussion of bottle jack basics, how to invert a bottle jack, and how to turn a bottle jack into an hydraulic cylinder. Part 2 of 2, press frame modifications, hydraulic fitting creation, final assembly and testing ... https://www.youtube.com/watch?v=X5GsS471sf4