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Old 8th August 2014, 02:05 PM   #1
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Unhappy Beginner help with resistor and color code

Hi,
I'm really freebie with electronics as you can read in title of the post.
I want to try to make something easy and i found this project for a simple pedal compressor.
Anyway I'm done with everything except for two easy step (not for me ):

- I need two resistors one 2k4 (2.4k) and one 4M7 (4.7M) I bought all the components in a shop with the part lists so I have these two resistors but I'm not sure are as the specs.

Click the image to open in full size.


- what does it means these symbols for the jack? I have to wire the ground to the ring and then!?


Click the image to open in full size.
Click the image to open in full size.

and what does it means the arrow above the fet?

Click the image to open in full size.

Really thanks a lot.
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Old 8th August 2014, 02:12 PM   #2
Mooly is offline Mooly  United Kingdom
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The FET is an N Channel JFET or junction FET like a 2N3819.The little arrow on the gate pointing inward means its N channel. The big arrow above the FET simply means that connection goes off to somewhere else on the circuit.

The jack symbols are a bit........ well unconventional maybe......

The little arrow seems to imply a switched connection. It can connect to one or other of the two dots to make a circuit.

Quite where they all go depends on the actual circuit.

The 10K with the arrow is a variable resistor like a volume control.

Does that help

And the pictures are to small to make the colours out on the resistors... measure them on your meter.
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Old 8th August 2014, 02:20 PM   #3
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Default thanks for the quick answer

thanks for the quick answer

sorry I uploaded the small pic
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Old 8th August 2014, 02:22 PM   #4
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P.S.: yes is the switch for the bypass. Thanks a lot again.
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Old 8th August 2014, 02:26 PM   #5
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24 k Ω ??
Resistor Color Codes & Component Identification
Edit: add another zero, so it's 240 KΩ.

Last edited by picowallspeaker; 8th August 2014 at 02:28 PM.
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Old 8th August 2014, 02:53 PM   #6
AndrewT is offline AndrewT  Scotland
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post3 ,
is it red, yel, org, brn, brn?
2, 4, 3, 1, 1

I think it is
2430 1% - for first digit, second digit, third digit, multiplier, tolerance. to 5band resistor code and 243 fits the E96 values.

I don't think it is 5 band including tempco - for first digit, second digit, multiplier, tempco, tolerance
= 24000 tempco 1%
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Last edited by AndrewT; 8th August 2014 at 02:58 PM.
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Old 8th August 2014, 03:28 PM   #7
Enzo is offline Enzo  United States
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The arrow pointing straight up from Q2 means a connection to the power supply. Probably a positive supply like +12v or +15v.

When a whole bunch of things all connect to the same power supply, instead of drawing the lines all over the schematic, they just do something like that arrow. The -15v might be an arrow pointing downward.
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Old 8th August 2014, 05:33 PM   #8
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tonepad -- file information

the complete schematics it there.

I bought the right resistors.
Now I need just to understand what is that arrow.

Really thanks to everybody for your help
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Old 8th August 2014, 05:40 PM   #9
Mooly is offline Mooly  United Kingdom
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From your link I just see a circuit for a DC-DC convertor using a MAXIM 1044 chip. The effects part of the circuit doesn't seem to be showing.

You can see a similar arrow on the 9 volt battery in that image.
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Old 8th August 2014, 09:57 PM   #10
Enzo is offline Enzo  United States
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If you are asking about the arrow by Q2, I don;t see Q2 on the schematic you linked.


I am still sticking with : it means the positive power supply.
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