Got all these at a yard sale today $2

[turd]

I swear I heard my new rig groan when I brought them in

[Goonda]

Heck man, I'm having a yard sale tomorrow. Bring your truck along. :)

[aja]

Hey can you please help a newb out here - what are the things I circled as A. B and C?

Are they like variable resistors?

[rapter_F22]

Put up better pictures of each part. Its hard to tell with such small pictures and far away.

[turd]

Hey can you please help a newb out here - what are the things I circled as A. B and C?

Are they like variable resistors? I have some time on my hands, hence the yard sales, so here you go.

They are all variable resistors in that they are adjustable . AKA trimmers, Potentiometer(pots), drop resisters. bleeders. Just dif in design.

These are all of the type referred to as trimmers (resistance trimmers). Just a pot that is designed for infrequent adjustment.

Resistance trimmers are required when the value of
resistance in a circuit must be adjusted to compensate for
environmental influences, or when the desired circuit
performance cannot be procured and retained through
manufacturing. (=volt modding your board)

Trimmers are mechanically driven, variable resistors. A
wiper is moved across the resistance element, picking off
an intermediate voltage in the potentiometer mode, or
adding resistance in the rheostat mode.



Ohm's Law defines the relationships between (P) power, (E) voltage, (I) current, and (R) resistance.

R ) Resistance determines how much current will flow through a component. Resistors are used to control voltage and current levels. A very high resistance allows a small amount of current to flow. A very low resistance allows a large amount of current to flow. Resistance is measured in ohms.





1. GENERAL DEFINITIONS
1.1 - Potentiometer
A potentiometer is a mechanically actuated variable resistor
with three terminals. Two of the terminals are linked to the
ends of the resistive element and the third is connected to a
mobile contact moving over the resistive track. The output
voltage becomes a function of the position of this contact.
Potentiometer is advised to be used as a voltage divider.
1.2 - Trimming potentiometer (trimmer)
A potentiometer designed for relatively infrequent
adjustments
1.3 - Multi-ganged potentiometer
A potentiometer with two or more sections, each electrically
independent, operated by a common spindle.
1.4 - Multi-turn potentiometer
A potentiometer with a shaft rotation of more than 360° from
one end of the resistive element to the other. Multi-turn types
are usually trimming or precision potentiometers.
1.5 - Sealed potentiometers
Two levels of sealing are usually recognized. The less
severe one provides protection only against dust and
cleaning processes (solvent splashes and vapors). For
definition of sealing, see table “Protection Levels” at the end
of these Application Notes. Hermetic sealing is more
rigorous and protects the product against environmental
pressure. (Not applicable for trimmers and potentiometers)

[turd]

Put up better pictures of each part. Its hard to tell with such small pictures and far away.


If you work with these you know what they are and the values are marked visible. They are sorted by value. A close up isent going to give you much more detail but I will try and get some up. The thing is that they go for a few bucks each and I have hundreds. Of course I will most likely only use about a dozen over the course of my life, but HEY it was a bargain.

[aja]

Thank you for the very informative reply :D

It all makes sense now, you didn't leave much room for misconception hehe...

I have hundreds

Erm, *cough sharing-is-caring cough*

[Conumdrum]

I always knew turds were smart! Thanks for filling in my lost memory, ohh there it goes again!