A nicer voltmeter clock

ChuckMcM•31 minutes ago

I always enjoy projects like this. Both because the are artistically neat and because the give me all sorts of ideas.

JKCalhoun•about 2 hours ago

Funny, I've been playing with panel-meters as well…

I have an analog computer I'm finishing up. I have ADC's to convert the analog to digital to display the values on an LCD (with an ESP32 dev board—it was more flexible than panel meters, cheaper than an oscilloscope).

But because looking at "simulated" panel-meters seemed to kind of undercut the point of the analog computer, I went ahead and created a small PCB to go from my analog computer to a panel meter like the one in the clock.

Running a "Spring + Mass" simulation on the analog computer and seeing both the LCD/ESP32 representation of a panel meter and an actual panel meter move in sync brought it all home.

cfunderburg•about 1 hour ago

So sexy! I could probably build the electronics easily enough, but such projects need workworking tools I just don't have room for in my tiny flat.

(nor would the missus be pleased for me to buy them - but that's another matter)

mauvehaus•32 minutes ago

If there's a makerspace or hackerspace near you, they might have a CNC router. Apart from (I believe) the front panel being a two-sided job, this is pretty straightforward and could be done entirely on a Shopbot or equivalent. Worst case you might need to learn FreeCAD and buy some collets ($10-$50) and bits (~$50-$75 if you're getting two). Best case, they have software and tooling you can use.

Source: am a furniture maker professionally. Have worked out of a makerspace, and have done equivalently complex projects on their Shopbot.

Edited to add: if you skip the rabbets around the gauges on the front panel, you can make that a single-sided CNC job, which makes it much easier. With some care, you could do those with a handheld router and a rabbetting bit.

NooneAtAll3•38 minutes ago

I expected seconds arrow to move much more smoothly than in the video

is 10Hz control just too slow?

chkaloon•about 1 hour ago

Cool! I was at least hoping for an op amp or two for the circuit however ;)

floxy•about 2 hours ago

Nice! Needs just a tweak to prevent the overshoot and bounce when going from high to low.

padolsey•about 1 hour ago

Nah the bounce is gorgeous

JKCalhoun•about 2 hours ago

Wut? We add extra lines of code just to get that in digital?

;-)

tra3•about 2 hours ago

This is gorgeous. I really need to hunker down and learn 3d modeling. It unlocks so many options from cnc to 3d printing.

JKCalhoun•about 2 hours ago

In my experience, having a project/goal will make it do-able for you. You have both the motivation and an target (dare I say, North Star?) in sight.

tra3•about 1 hour ago

You’re exactly right..that’s how I end up learning tech stuff. It’s not working very well with modelling though. I’ve set my sights too high, the projects are too involved

anonu•19 minutes ago

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A nicer voltmeter clock

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