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Old 31st August 2005, 07:24 AM   #1
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Default Standards of parts naming on PCBs?

If I have a 2-channel circuit on one PCB, and a bunch of parts such as resistors labeled R1, R2, R3, etc.....would it be standard practice to give both channels the same #s or to only have one unique number designated to each device?
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Old 31st August 2005, 07:31 AM   #2
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Hafler used 101, 201 labels for the left and right channels.
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Old 31st August 2005, 08:33 AM   #3
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Are there any standards?

My standard is not to exceed 3 positions in the name becasue it will be too long to get visible on the pcb.

My standard is:

Left channel

R
C
T

Right channel
R = E (resistors)
C = G (caps)
T = V (transistors)


R34 in the left channel is E34 in the right etc.

I use different letters which not are used for anything standard.

My goal is to have the designators visible when the part is mounted
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Old 31st August 2005, 08:46 AM   #4
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A good way I have found is to use odd numbers for the left channel even for the right. So R1 is on the left and is the same as R2 on the right. Using this way you are less likely to run into triple figures so it's easier to fit and see them on the board.
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Old 31st August 2005, 10:40 AM   #5
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Quote:
Originally posted by peranders
....T = V (transistors)...I use different letters which not are used for anything standard.
V - tube, voltage source
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Old 31st August 2005, 10:54 AM   #6
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Standard seems to be as stated by DJK , one channel R101, other channel R201. The industry seems to follow this rule. Altec Lansing, EV, Peavey, QSC, Crown from what I have seen and remember and there are others.

Transistors= Q
Resistors =R
Caps =C
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Old 31st August 2005, 10:54 AM   #7
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Quote:
Originally posted by peranders
Are there any standards?

My standard is not to exceed 3 positions in the name becasue it will be too long to get visible on the pcb.

My standard is:

Left channel

R
C
T

Right channel
R = E (resistors)
C = G (caps)
T = V (transistors)


R34 in the left channel is E34 in the right etc.

I use different letters which not are used for anything standard.

My goal is to have the designators visible when the part is mounted
P-A,

I don't think you can talk about a "standard" if there is only on person using it...

Jan Didden
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Old 31st August 2005, 12:13 PM   #8
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Standard for me is when I have done something more than once.
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Old 31st August 2005, 12:53 PM   #9
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Quote:
Originally posted by peranders
Standard for me is when I have done something more than once.

So, even your definition of "standard" is different from the standard..

Jan Didden
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Old 31st August 2005, 01:00 PM   #10
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Don't really know if such a standard exists, but
R,C,D,Q,L,F,T,P seems to be the most common ones....
Res, Cap, Diode, Transistor, Coil/choke, Fuse, Transformer, Connector..
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