What mean?

MaXiZ · 16th December 2003, 04:28 PM

I know that may appear like a really stupid question but what mean these two symbol? Thanx!

Matttcattt · 16th December 2003, 04:46 PM

a trasistor with a heatsink (left) and a thermistor (right)

im not perfectly sure about the thermistor though...

qwad · 16th December 2003, 04:48 PM

first one is a transistor[ not sure if a pnp /npn] second is an adjustable resistor for setting bias etc, along with its value, ppl with more knowledege than me, will correct me if I am wrong; cheers

Tomcat

MaXiZ · 16th December 2003, 04:53 PM

a trimer? (the second one)

dhaen · 16th December 2003, 04:57 PM

Quote:

Originally posted by MaXiZ
a trimer? (the second one)

Yes

faustian bargin · 16th December 2003, 05:12 PM

Quote:

Originally posted by qwad
first one is a transistor[ not sure if a pnp /npn] ....

there is some mnemonic for this...I THINK it's this:

NPN is 'Never Points iN

PNP is 'Points iN Perpetually

someone please correct me if i am mistaken. i'm not an EE guy, i just read a basic textbook recently.

/andrew - dammit jim, i'm an architect, not an electrical engineer!

Elso Kwak · 16th December 2003, 05:14 PM

Quote:

Originally posted by qwad
first one is a transistor[ not sure if a pnp /npn] second is an adjustable resistor for setting bias etc, along with its value, ppl with more knowledege than me, will correct me if I am wrong; cheers Tomcat

Its a NPN transistor and a variable resistor or trimmerpot. Pot being short for potentiometer.

Page 61 a.f. in Horowitz. Have you searched H.??

Quote:
"A transistor is a 3-terminal device (Fig.2.1) available in two flavors (npn) and (pnp) with properties that meet......."
BTW I am a bloody chemist.

MaXiZ · 16th December 2003, 05:26 PM

thanx to all for the answer!

16th December 2003, 04:28 PM	#1
MaXiZ diyAudio Member Join Date: Jun 2003 Location: Italy	What mean? I know that may appear like a really stupid question but what mean these two symbol? Thanx!

16th December 2003, 04:46 PM	#2
Matttcattt diyAudio Member Join Date: Feb 2003 Location: Bristol	a trasistor with a heatsink (left) and a thermistor (right) im not perfectly sure about the thermistor though... __________________ If it aint broke, don't fix it. If it is broke, fix it. If you can't fix it, take it apart and see how it "worked".

16th December 2003, 04:48 PM	#3
qwad diyAudio Member Join Date: Mar 2003 Location: adelaide city of churches	first one is a transistor[ not sure if a pnp /npn] second is an adjustable resistor for setting bias etc, along with its value, ppl with more knowledege than me, will correct me if I am wrong; cheers Tomcat __________________ we all have problems only some people have more than most.... long live the Magyar (Hungarians) in the world!

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16th December 2003, 04:53 PM	#4
MaXiZ diyAudio Member Join Date: Jun 2003 Location: Italy	a trimer? (the second one)

16th December 2003, 05:26 PM	#8
MaXiZ diyAudio Member Join Date: Jun 2003 Location: Italy	thanx to all for the answer!

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