givc

Actually nowadays it means exactly 2.54 cm as that’s how it is defined. Which also means all distance measured in US Customary units is ultimately metric too

I don’t know a whole lot about RFID, but some of the most basic cards can be copied very easily. When scanned, the reader always reads the same bits.

I believe there are some more secure cards, like Mifare DESFire EV3 that do provide some security. You’d be shocked how insecure most RFID readers for security cards are.

In US highways the exit ramp off the road is usually on the right, but is some cases the exit is on the left, especially in areas where the highway is elevated or in crammed downtowns. The left lane is also usually the “passing lane” and cars drive faster than on the right, so if there is a left exit and you’re cruising on the right line, you have to know in advance to safely move over to the left

I used OpenSCAD to create a map of Manhattan. It shows the live location of subway trains. It was surprisingly easy, I struggled a lot with OnShape and Fusion360 trying to do this because there were too many polygons.

I found that starting with an SVG and extruding from there is perfect in OpenSCAD, but I’m sure I’m underutilizing it a lot.

I wrote a bit about it here if you’re curious https://hackaday.io/project/202488-manhattan-subway-map/deta...

This is awesome. I’ve also been playing with OnShape to make lamps and it’s been quite challenging. I also tried Blender but the learning curve is just too steep for me. I like this idea of using Python. I might try OpenSCAD too like someone else suggested.

Here’s my lamp if you’re curious, printed with a .8 mm nozzle, otherwise it would fail https://imgur.com/a/mRqw1pI

I found that combining OpenSCAD with SVGs for extruding complex shapes is quite powerful. I made a map of Manhattan that could not be handled by any other CAD program I tried without crashing, but OpenSCAD handled it really well.

I wrote more about it here, although I only mentioned OpenSCAD briefly https://hackaday.io/project/202488-manhattan-subway-map/deta...