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Holly couldn't afford a plane. He and Ricky Nelson and Eddie Cochran could afford bikes and rode together. Nelson and Cochran were murdered. The death of Holly and 3 others amounted at least to 1st degree manslaughter or 3rd degree murder and probably 1st degree murder. Before the transistor...

Deutchendorf rolls into Lubbock a year or two after Buddy Holly, also a pilot, died in an air crash. Coincidence? Holly had recently recorded "Think it Over," obviously written by a woman, who was obviously Vi Petty, a concert pianist. Listen to her bang on the keys! She was pretty damned mad...

https://www.amazon.com/DROK-Capacity-Voltmeter-Multimeter-Shielded/dp/B08HP5VD4M In 1879, 24 y-o Edwin Hall discovered that he could count watt hours without cutting the wires from his e-bike battery. :)

It reminds me of the way a technician might pick up a resistor with insulated pliers and warn laymen to stand back because it was 33,000 ohms. :rolleyes:

https://fazzler.com/john-denver-the-untold-story-of-a-vietnam-sniper/

My voltages are for a 48 volt nominal battery. If it reads 58.4 with the charger on, it's fully charged. When you shut off the charger, it's 54.4. It stays pretty close to that all the way down to 20%.

So you installed a shunt. I don't feel so bold! It looks like 750 micro-ohms. I imagine the resistance could easily vary by a lot of micro-ohms. That meter is going to lie to you and laugh at you when you aren't looking!

LiFePO charges up to 58.4, is fully charged at 54.4, and is down to 20% at 51.

It's advertised at plus or minus 1%. A lot of cheap stuff is accurate these days. It was only a few years ago that I learned that modern clamp-on meters can measure DC amps. I bought one and discovered that my 12 hp mower takes a lot more cranking amps than my car. That's because the mower is...

How come your displayed watts aren't the product of displayed volts and displayed amps?

Hall effect: I'm tempted... https://www.amazon.com/bayite-Waterproof-Display-Voltmeter-Transformer/dp/B0BFJ5NV5L My Radpower bikes would run down with the controller off unless I switched off the battery with the key. My Aventon battery can't be switched off with a key. It switches itself off...

Ahh... I see them on Amazon for golf carts. I wonder if they contain zeners. If they show voltage while the cart is on a charger, I wonder why they don't draw current whenever battery voltage is above the minimum. The instrument panel of my 1984 Nissan had a 10 to 16 volt gauge. I think the...

@PCeBiker The great thing about an analog meter is that the info doesn't have to go through the part of the brain that reads numbers. It's good for seeing at a glance and for catching quick changes. I'm tempted to put one on my bike to see voltage dips when I open the throttle. The size of the...

That takes me back. When stereos used discrete transistors and headphone jacks were fed through 220 ohm resistors, I used to make L pads to attenuate by perhaps 90% and reduce output impedance to less than 1 ohm. Attenuation let me turn the volume up so I didn't lose as much detail in crossover...

I've been 36 miles since my last charge, and the display still reads 99%. Before replacing the computer, I checked the battery: 53.28 volts. I guess it's not the computer. It must be those lentil beans, not to be confused with the beans I keep on the beam over the door. Those are lintel beans.

A lot of zeners are rated at .125 W. If you use a 40 volt zener, the meter movement can't need more than 3 ma. You could use a higher-power zener or put them in series, like 2 20s or 4 10s.

I was in Holden on June 9, 1953 when I watched the tornado destroy my neighborhood 5 miles away. I'd just finished kindergarten. A little girl who lived near me was riding her bike on an errand. Her parents identified her mangled bike, but she was missing for three days. She'd been found up on a...

I used to ride a Jackson, a rebranded Raleigh sold as a motorless motorcycle to avoid Elizabeth's sky-high bicycle export tax and Dwight's retaliatory bicycle tariff. (I don't know if the queen of France said, "Let them eat cake," but Elizabeth seems to have said, "Let Americans ride Captain...

I didn't have a schematic. If I wanted the analog movement to read what was over 11 volts, I needed an 11 volt reference. I don't remember if I used a zener diode or a voltage regulator IC, adjustable by resistance between two leads. Now the meter could measure the difference between the supply...

I like electronics with PDF manuals available so I can find the manual on my computer when I forget the instructions. Was it 20 years ago that I bought a Kill-A-Watt? It didn't need instructions. The five buttons were labeled to show 8 measurements. Their price kept rising as cheaper ones with...