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Amazon offers: 10K Temperature Sensor Probe https://www.amazon.com/DROK-Waterproof-Temperature-Thermistor-Transimitter/dp/B01MR37GOQ I found one even cheaper on TEMU. The WTESKE Manual says: Type of

There is a PI controller with certain AC behavior. I need to use this PI controller in order to drive a coil (current controlled oscillator) of 1.5 ?H inductance. For DC behavior at 10 mV input I

Found many variations of 2/3 AAA NiMH in multi packs on Amazon. Both button top and tabbed. It does appear that 300mA is harder to find. Going to next step in capacity, 400mA, yields better

For kicks and grins I sent an email to Sabre to ask if I could purchase a replacement battery. Their response was " The battery is non-replaceable". I replied that I already had the unit apart and

Want to think about fireworks.... https://www.cnbc.com/2024/09/13/tesla-semi-fire-needed-50000-gallons-of-water-to-extinguish.html# My brother in law was trapped on the interstate for an hour or so

As a teenager I bought pure lithium metal. It was supplied in a jar covered by oil. I cut off pieces and threw them into snow or ice for instant fireworks. Bertho Sent: 20 January, 2025

Trust me, I took enough chemistry in college to know lithium and water react rather violently. But no one was listening to me when the phone went up in flames and someone grabbed a child's squirt gun

Chemically, Lithium is very reactive to air and water. Hence, water is NOT a good method to put on a Li-ion fire.

Roy, I have quite a bit of association with LiPo batteries. I fly RC aircraft and LiPo's are the preferred power source. Many times there are articles of flyers charging their batteries and having

I had a bunch of them a while back, and eventually gave up on them completely. The lower terminal voltage was an issue, and they just didn't seem to reliably hold a charge. Had some of those,

I suspect it'd take quite powerful ultrasonics to break up the 'whiskers' that grow in the electrolyte. I never considered freezing, I'll pass that idea on to ham friends who still fight with

I'll try the freezing process and see what happens. Thanks, Dan

Interesting thanks, Ive had few nicads & LiMH pretty much similar issues you've observed and incl trying to perturb them enough (incl slap then hard to break up shorting crystals)? to take a charge

NiCads can have some odd failure modes, yours is fairly common, under no load the cell will produce ~1.2V, place any significant load and the voltage drops to zero, and the cell won't take any charge

Update on my repair. It's NOT! I replaced the diode bridge and LED and connected the battery after "charging" for about 5 minutes. I stopped when I noticed the battery voltage was approaching 10

Low voltage is a parallel star connection. This motor can’t be connected delta. The phase windings are connected in series, only one star point (permanent inside the motor) for high voltage.

Ir I remember my 'Y' connection theory, to reverse the motor direction you would reverse any two input leads. Therefore if on 208 each phase line would be connected as such: X---1 Y---2 Z---3 To

It has been 50ish years since I studied 3 phase, however looking at my class notes, yes interchanging leads 1 to 2, 2 to 1 or? 1 to 3, 3 to 1? or 2 to 3, 3 to 2 will reverse the direction of

OK, cannot include a PHOTO of the connection diagram on the 3PH 3/4HP motor in question. However it is rather a simple matrix diagram of nine points of connection: *o o o* *o o o* *o o o* *They are

Roy, I received the LEDs yesterday. I selected a 1 watt mounted on a 20 mm heatsink. Today I put 3.2 volts to the LED and measured the current at 200 ma. I am going to wait for todays mail for the