I was looking for some reference and I found this resistor symbol:
All the resistors in the schematic (several sheets) have the same symbol, so I concluded that it means nothing, but I'm not sure. What does the dot mean?
Resistor symbol with a dot
resistorsschematicssymbol [~]
Related Solutions
Just another way of drawing a logic inverter ("NOT").
The triangle-with-bubble is an inverter: logic high input yields logic low output, and vice versa. Usually the bubble is shown on the output, but in a mixed-logic system, the bubble can be shown on the input instead.
When the bubble is on the input instead of the output, that indicates that the input is an active-low input.
Doing a google search of "Resistor Symbol" and then looking at images, I came across this.
http://www.electroniq.net/electronic-tutorials/resistor-types-symbols-parameters.html
According to the site, its a varistor tolerated symbol.
a: resistor , general symbol
b: resistor , tolerated symbol
c: resistor , un-standard symbol
d: resistor with variable resistance
e: resistor with mobile contact
f: resistor with mobile contact and stop position
g: potentiometer with mobile contact
h: potentiometer with mobile contact, general symbol
i: potentiometer with preset adjustment
j: two plugs resistor
k: shunt resistor
l: thermal resistor
m: thermistor general symbol
n: thermistor tolerated symbol
o: varistor general symbol
p: varistor tolerated symbol
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Best Answer
The dot is not standard. It is a marker on the resistor symbol to indicate pin 1. The only reason I can think of when this is useful is when using the circuit for spice simulations so that you know what side to probe for pin 1 or the orientation for current.
Update: Asked around some more and found someone who does this on schematics! The answer they gave me as to why: "it helps when debugging the board". They place the dot on the printed circuit board as well as in the schematic. That way when they are debugging they can quickly determine which side of the resistor they are probing without having to trace the line.
Avoid this style. You will confuse people!