RedBinary

It's 180C or 356F

I just linked to the first relevant info that I found - I didn't even see any SDS/MSDS there. I am actually in the USA and have worked in HDPE processing for around 25 years. If you look at an SDS for HDPE (which we go over once a year in an OSHA required meeting) you will see that it is totally inert in all states and the greatest risk of harm can come from inhaling excessive amounts of fine dust created when processing. This is a mechanical issue and not one of toxicity. The plant I've worked in for the last 15 years is actually a member of the OSHA Safety & Health Achievement Recognition Program (SHARP) and means we're audited for policy and procedure twice annually. The only safety gear we're required to wear while working all day in a plant of 10 large machines all heating HDPE …

I just linked to the first relevant info that I found - I didn't even see any SDS/MSDS there. I am actually in the USA and have worked in HDPE processing for around 25 years. If you look at an SDS for HDPE (which we go over once a year in an OSHA required meeting) you will see that it is totally inert in all states and the greatest risk of harm can come from inhaling excessive amounts of fine dust created when processing. This is a mechanical issue and not one of toxicity. The plant I've worked in for the last 15 years is actually a member of the OSHA Safety & Health Achievement Recognition Program (SHARP) and means we're audited for policy and procedure twice annually. The only safety gear we're required to wear while working all day in a plant of 10 large machines all heating HDPE to around 350F are standard hearing and eye protection.As I said, though, residual chemicals from poorly washed bottles would be a separate matter.

While this can be a serious concern with other plastics, generally only if they are visibly burning and vinyls especially , clean HDPE does not pose any hazard. Any lingering chemicals that were contained in them are a different matter.https://www.directplastics.co.uk/whats-in-those-fumes.html

Silicone is a good one too! I was thinking of my wife's little bread and lasagna tins (I'd get sooooo hurt if I used those for ANYTHING.) Once the metal cools the HDPE should pop right off. We do use silicone spray to reduce sticking on hot metal surfaces as well, so that would be another option as well. We also use Pam cooking spray. Honestly! When the guys are using that on the heads it makes the whole area smell like delicious waffles!

Hey thanks for the kind words! My son was obsessed with the original MIDI Fighter at the time and so was the inspiration for this. I haven't looked at expanding this particular project any as my son no longer DJs. However I am working a little here and there when I can get time on a different audio effect project. It'll maybe use an encoder but not really in any cool way.

Chargers supplying 2 amps and more are pretty common and really inexpensive now so I've just been using a cheap 2.5A. I had an antique truck that I'd made a linear supply using an LM series chip and installed into the ash tray. Soon I'll likely either be making another of those or disassembling a cheap charger and installing it directly into my dash. The cigarette plugs aren't the most stable or secure connectors and mine come loose fairly frequently.

Thank you for the kind words! It would certainly be possible to use encoders instead of pots. How that would be done is a little beyond the scope of a comment here, but the all of the variables containing "analog" and the routines that handle them would be the bits in question.

Nice!

No sweat! It was a Teensy 2.0. The other board labeled "PacMod rev 1.0: is just a PCB I etched to solder a socket for the Teensy and terminals to land the other wiring.

Thanks! No multiplexing on this. Each button is wired directly to a digital input.

Thanks!

Not big. It's just a bulb auger for planting bulbs that you can get at about any garden center for a couple of dollars. It's maybe 2 to 2-1/2 feet long and around a 3" circumference.