To me, a generator is a diesel engine fitted with an alternator, and a device with a commutator that delivers DC is a dynamo.

 

I appreciate your effort to contribute.

For future posts please consider avoiding unnecessary symbols (and numbers) demanding extra efforts to read what otherwise would be a simple / clear text.

When pasting output from chatbots, there are often stray characters.

 

I would only copy and paste from the files on my computer, which I create. So no strange characters and hopefully no malware.

 

I would only copy and paste from the files on my computer, which I create. So no strange characters and hopefully no malware.

Unless the characters are markdown, I'm not sure how it could be malware unless the hackers already have access to the back-end. The code has to be in the proper encoding to be run. I'd be surprised to learn this can happen with nonsensical pasted characters (especially from a chat bot). Anyone have more info?

 

Never under-estimate the capabilities of the malware creators!

 

Nice list, this will be really helpful especially for beginners and non-native English users


You could also add a few more common ones like “earth = ground”, “jumper = link”, and “sink = load” depending on context. Maybe grouping them by category (power, components, signals, etc.) would make it even easier to scan.


Looking forward to seeing this grow into a solid reference

 

GND = ground (0V reference)
VCC = positive supply voltage
VDD = positive digital supply voltage
VSS = ground reference (common in ICs)
VREF = reference voltage

 

GND = ground (0V reference)
VCC = positive supply voltage
VDD = positive digital supply voltage
VSS = ground reference (common in ICs)
VREF = reference voltage

You missed Earth GND
"GND = ground (0V reference)" grossly missused

 

Sucinctly put by DR Archambeault.
Earth symbol grossly missused as GND
At least Kicad show the correct distinction between Earth and GND

 

GND = ground (0V reference)
VCC = positive supply voltage
VDD = positive digital supply voltage
VSS = ground reference (common in ICs)
VREF = reference voltage

Actually, Vdd is the positive supply voltage for CMOS circuits (D stands for Drain), and Vss is the negative rail (S stands for Source). This parallels Vcc (C stands for Collector) and Vee (E stands for Emitter). Whether or not Vss and Vee are connected to GND depends on the circuit. It is a reasonably safe assumption for digital logic circuits (except for ECL), but not at all safe for bipolar or analog circuits.

And then there are old 6-transistor radios that had Vcc = -9 Vdc.

ak

 

To me, this is what a growler looks like:

View attachment 297818

To me, this is what a growler looks like:

View attachment 297818

Per Gemini:

an armature growler is a diagnostic tool used to test for shorts, opens, or grounds in the windings of a motor or generator armature.

How it Works
The device essentially acts as the primary of a transformer. It consists of a coil of wire wrapped around a laminated iron core, which is shaped like a "V" or a curve so an armature can be laid into it.

1. Magnetic Induction: When the growler is connected to an AC voltage source, it creates a rapidly alternating magnetic field between its poles.
2. Transformer Action: When you place an armature into the growler, the armature windings act as the secondary coil of a transformer.
3. The "Growl": The alternating magnetic field causes the metal plates of the growler and the armature to vibrate, creating a distinct humming or “growling” sound.

Using the "Hacksaw Blade" Test
The most common way to find a short circuit using a growler is the feeler test:

• You place a thin piece of magnetic metal (like a hacksaw blade) on top of the armature core.
• As you rotate the armature in the growler, the blade should remain still.
• If the blade starts to vibrate or "chatter" over a specific slot, it indicates a short circuit in the winding underneath. The short creates a closed loop, allowing current to flow and generating its own magnetic field that attracts the blade.

 

PLC = programmable logic controller
Peckerhead = motor power entry hood. Where the wires are connected to the motor
Ohm it out = ring it out = using an ohm meter of some kind, check continuity between points specified around the statement
Ping it = use the existing communication method ( using context) to send a diagnostic packet that should return a response from the device being 'pinged'
dead head = usually in hydraulics, leave no place for pressure release, forcing the pump to try and pump past its maximum. Usually to some automatic protection that shuts the pump down.

sorry for the wide range, maintenance tech here

That is a new 'Dead Head' meaning for me. I have seen that phrase used in many contexts.

 

Many were around back then, but many were not even concepts. But in 1973 we already had computers and a/d as well as D/A converters Also DIPs and PROMs. No SMDs as we know them, but there were some interesting schemes for automated assembly. The biggest difference then was that a fair amount of consumer electronics was considered worth repairing, and so there were repair shops that actually could repair things.

Yep, after WWII, with the GI Bill, many went into radio & TV repair. Not their sons / grandsons tho. The world of appliance repair was all disposables now and Surface Mount itty-bitty circuit boards. Same with car repairs. A world where an adult could fix many things to now where an adult has no concept how many things even work.

 

Per Gemini:

an armature growler is a diagnostic tool used to test for shorts, opens, or grounds in the windings of a motor or generator armature.

It acts as a transformer primary and uses the DC armature as the secondary, the voltage is then measured between each adjacent com segments for low voltage. indicating a defective turn.

 

A collection of abbreviations and Greek letters in transformer designing

 

A collection of abbreviations and Greek letters in transformer designing

Wouldn't G be wire Gauge rather than winding Length in cm ?

 

Wouldn't G be wire Gauge rather than winding Length in cm ?

$$D_{AWG}$$
for wire diameter. This is used in American (Imperial).
In EU countries with metric system, they use something else, but I do not know what

 

I typed the PDF in MS Word to make it print friendly. The original text does not print well. It is low-rez