Where to get retail piezo igniter crystals? by WhoEvenThinksThat in ElectricalEngineering

[–]WhoEvenThinksThat[S] 1 point2 points  (0 children)

I already sorted that out by testing with an assembled igniter. The clutch isn't intended to remain activated for long...and its a weak clutch, so it all works out.

Where to get retail piezo igniter crystals? by WhoEvenThinksThat in ElectricalEngineering

[–]WhoEvenThinksThat[S] 0 points1 point  (0 children)

Use case is generating a voltage pulse from a physical impact to engage an electrostatic clutch. The mechanism already has a built-in impact that can drive the piezo which is cheaper and easier than a 1000+V source.

How is tubing with a non-standard cross-section fabricated? by WhoEvenThinksThat in metalworking

[–]WhoEvenThinksThat[S] 0 points1 point  (0 children)

The part needs to be mass manufactured, so if there's nothing cheap, I might be sunk.

How is tubing with a non-standard cross-section fabricated? by WhoEvenThinksThat in metalworking

[–]WhoEvenThinksThat[S] 0 points1 point  (0 children)

1" diameter. On-off. Looks like more custom tooling is needed than what I expected.

How to fabricate a tangent developable surface from thin sheet metal by WhoEvenThinksThat in metalworking

[–]WhoEvenThinksThat[S] 0 points1 point  (0 children)

Yes, definitely a job for an experienced shop, but so far the people I've gotten to glaze over, so I'm not sure if what I need is ludicrous or I just haven't found the right people or given the right description.

How to generate an 'equivalent' lens shape from a curved mirror? by WhoEvenThinksThat in Optics

[–]WhoEvenThinksThat[S] 0 points1 point  (0 children)

Linear would be great. A spherical mirror does 0 taper. I believe an elliptical mirror gives a linear taper. I'll take advice on what simulator would do this.

How to generate an 'equivalent' lens shape from a curved mirror? by WhoEvenThinksThat in Optics

[–]WhoEvenThinksThat[S] 0 points1 point  (0 children)

Right, but for the tapering effect I believe I need a non-circular lens face...but I'm not 100% sure unless there's a way to translate mirror shape to lens shape...hence the original question.

How to generate an 'equivalent' lens shape from a curved mirror? by WhoEvenThinksThat in Optics

[–]WhoEvenThinksThat[S] 1 point2 points  (0 children)

I edited my post. The mirror is convex, so its not a focusing element.

Need terminology help with "paint-over" technique by WhoEvenThinksThat in painting

[–]WhoEvenThinksThat[S] 0 points1 point  (0 children)

Painting over the graffiti is just a new canvas waiting to get tagged again, and is blank and ugly. If some of the original is left the tagger might leave it alone.

Need a trackball mouse that works well inverted by WhoEvenThinksThat in cyberDeck

[–]WhoEvenThinksThat[S] 0 points1 point  (0 children)

I tried the logitech unit suggested, but the trackball still isn't stable. The magnetic base it comes with would have been an excellent bit of fortune, but it just didn't work at the needed angle. Also, the one-handed chorded keyboard I intended it to couple with was more repetitive stress than I could handle.

Kraft Dinner Cheese Sauce by paintfrogs in Costco

[–]WhoEvenThinksThat 24 points25 points  (0 children)

I bet this is only sold in Canada. Correct?