Noobie Electronics

brentt · 22nd June 2005, 06:37 AM

Ive got a few Circuit diagrams for guitar effects pedals and im not sure wat a few of the symbols mean im pretty sure its the same one but id just like to no b4 i make anything ill attach the pic of the symbol

brentt · 22nd June 2005, 07:34 AM

Apparently its a "Common Point" What the hell is that?

Frank Berry · 22nd June 2005, 07:39 AM

The symbols on the right prabably represent the ground trace on a printed circuitboard. The symbol at the left is where the circuitboard ground connects to the chassis.

Enzo · 23rd June 2005, 04:27 AM

Those symbols represent ground or circuit common. There are various ways to draw it, so it may look different in one company's drawings than another's.

The flat line is one, and the upside down pyramid too. Those are what you presented. Ther is also one that looks like a garden rake.

Though we may call it ground, in a battery operated circuit, there may not be an actual connection to ground. it is then simply called the "common" connection. In some parts of the world, they refer to ground as "earth" in the sense that it ultimately connects to something conducting to the actual earth outside.

brentt · 25th June 2005, 07:18 AM

Thanx for helping me out with that but now im not sure on another component. Ill add a pic....

Brett · 25th June 2005, 02:33 PM

Quote:

Originally posted by brentt
Thanx for helping me out with that but now im not sure on another component. Ill add a pic....

It's a variable resistor, or potentiometer, usually abreviated to 'pot'. In the Wah pedal you linked it is the resistor that controls the wah function, and is usually mechanically geared off the pedal lever itself. The same type of device is used in just about all rotary controls on electronic instruments, such as volume controls etc. The long linear channel gains on mixing desks, and the sliders on graphic equalisers are identical in function, it's just that the control moves physically in a different way, ie linear rather than rotationally.

Hotz Potz is a brand name for the part.

22nd June 2005, 07:39 AM	#3
Frank Berry diyAudio Member Join Date: Sep 2003 Location: Midland, Michigan	The symbols on the right prabably represent the ground trace on a printed circuitboard. The symbol at the left is where the circuitboard ground connects to the chassis. __________________ Frank

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Noobie	IDSKoT	Introductions	1	6th May 2009 02:44 PM
Please help out a Noobie...	audio_moksha	Tubes / Valves	13	12th November 2006 10:47 PM
A few noobie Q's about box design	david_moechnig	Multi-Way	6	28th June 2004 09:26 PM
noobie	dudemyster	Parts	1	22nd January 2004 03:00 PM
Hi from Yet Another Noobie	blip	Introductions	2	9th March 2003 08:52 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

22nd June 2005, 07:34 AM	#2
brentt diyAudio Member Join Date: Jun 2005 Location: Albury	Apparently its a "Common Point" What the hell is that?

23rd June 2005, 04:27 AM	#4
Enzo diyAudio Member Join Date: Sep 2004 Location: Lansing, Michigan	Those symbols represent ground or circuit common. There are various ways to draw it, so it may look different in one company's drawings than another's. The flat line is one, and the upside down pyramid too. Those are what you presented. Ther is also one that looks like a garden rake. Though we may call it ground, in a battery operated circuit, there may not be an actual connection to ground. it is then simply called the "common" connection. In some parts of the world, they refer to ground as "earth" in the sense that it ultimately connects to something conducting to the actual earth outside.