Tapping 6-32 in aluminum

The problem is, I use a reversing switch AFTER the regulator... i

No, but teaching/learning tools seldom are. They're an investment. I learned how to cross-brace the structures to give them more strength, learned about cantilevers, gears, pulleys, etc.

I don't know how much they cost back then since mine came as a gift from Mom's new male friend (Dad's BOSS!) during the year Mom & Dad were separated. The bribe helped, but I still didn't like him, and would have hated him more if I'd known he was Dad's boss at the time. (The plot thickens, wot?)

They're very handy in their niche.

Shipped direct from China ($3/1 month dlvy time) or from the USA ($15/1 week)?

A joystick.

-jsw

I hope you aren't about to give us any more of a little too much information.

I've learned a lot from stuff that was free or very cheap because it was broken. I learned very early not to get caught taking apart things that weren't broken, like new Christmas toys.

-jsw

I know whst they look like - and they are not there. It uses "laser trimmed resistors" for calibration - and I think they over-trimmed them. Suspect what is sold on e-bay direct out of china is the rejects for some brand name product sold elsewhere at significantly higher price

I've been paying a little more to gain the filtering effect of Amazon's return policy, which prods vendors into replacing junk for free. Often someone posts a link to the missing manuals and wiring schematics in the Comments.

-jsw

I've been satisfied with this USB power meter:

I don't remember exactly how accurate it was, and another could be different. It was close enough to tell which USB hard drives would run comfortably off the laptop USB2 port (WD) and which were marginal (Seagate) and should be on USB3 or a powered hub.

I sorta wish I'd bought a dual display meter because the drives can take longer than the Volts / Amps display switching interval to come up and stabilize.

-jsw

Wow, this is great, I see how I could have used it!!!!

Ignoramus13314 fired this volley in news: snipped-for-privacy@giganews.com:

Ig,

With a joystick, you may not have any 'on-off' switches. You certainly would NOT want to impose on the driver the additional task of manipulating switches separate from the joystick.

However, if you're driving a logic circuit or variable regulator with the 'pots' on a joystick, you can establish a range of travel that amounts to a 'null' setting, where no current will flow. Anything outside that null range would be considered an incremental setting for voltage/speed.

Lloyd

That one is cheap and the pot is clear in the photo. A panel-mount one would be easier to add to throttle a variable regulator in the control box you built.

The resistor between OUT and ADJ sets the constant current value. For a 1K pot, 4mA through it will give you an output range of 1.25V to

-jsw

Ahhh. I misunderstood/misread as consumption of domestic goods. Is there a doG?

Thanks for the followup. Very informative.

Twice as long as half it's length.

! wasn't talking about the USB one - I was taliking about the higher voltage higher current ones used by the RC plane guys.

double sided thermal tape and thermal cement is made specifically for this use. see

Sure, Steve. It's easy to develop a completely wrong impression about our trade situation.

BTW, that research piece by the Fed is one of the few you'll see that analyzes the foreign-made components of products assembled in the U.S. It's not easy to measure, and off-the-cuff estimates are all over the map. This one looks like it was done right.

Ayup. Dad taught basic physics to me early on, and always encouraged me to dismantle things and figure out how they worked. This has served me _well_ throughout my lifetime.

Ditto here, when I was 4. I learned NOT to take apart electric clocks. At that age, tiny things bend far too easily.