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On-On-On

Started by kurtlives, September 09, 2008, 07:46:42 PM

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kurtlives

Quote from: John Lyons on September 14, 2008, 12:57:24 AM
The switch is just making a connection.
Take out your meter on "beep" (continuity) and test the switch.
Make a diagram of the switching scheme.

Make sure the diode clipping configuration is correct and you should be set.
Not much to figure out otherwise.

The diagram The French connection posted shows the orientation of the diodes.

john

???
One is going one way the other goes in the opposite direction... ??? Pretty hard to not orient them right I would think.
My DIY site:
www.pdfelectronics.com

calpolyengineer

I have been looking for this for awhile, but I recall reading somewhere that one of the LEDs will be on while the other will flicker (usually faster than you can see). Can somebody back this up, or am I just going crazy?

Also Chris, does the LED mode work and you're just wondering why one LED lights and the other doesn't? Or does it not work and those are the symptoms?

-Joe

kurtlives

It does not work and those are my symptoms.
My DIY site:
www.pdfelectronics.com

calpolyengineer

Ok, next. Do both of your other modes work? Have you tried reversing the LEDs (use the same LEDs but switch their direction), if the same LED that was staying on is still on when you reverse them, it tells you that its the LEDs that cause one to stay on, if the other LED now stays on then it is something with the circuit that is causing a DC voltage across the LEDs.

Sorry if I am asking questions you already answered. This thread kinda got hijacked into a "How to use On-On-On switches" rather than fixing your broken circuit. I'm trying to help consolidate some info here so that some of the geniuses around here will pay attention.

-Joe

John Lyons

To start from the bottom and get your circuit working try this.
All the clipping diodes connect between pins 1 and 2 of the op amp.
The two wires that connect to the board of the clipping switch should connect to those pins.

On the LEDs there is a flat spot which is the cathode(it's a stripe on the diodes)
Make sure that the LEDs flat spots are running opposite each other.
Make sure that the diodes are doing the same.

I'm not looking at the clipping board right now but there are usually two diodes
in one direction (series) and one diode in the other direction for one of the settings.

What I would do is get your two wires from the main board.
Disconnect them from the clipping board.
Get a pair of LEDs and solder them together in opposite directions (back to back)
Connect one wire from the boad to one pair of legs, solder the other wire to the other pair of legs.
The specific wire or polarity of the diodes you use will not matter.

Does the circuit work like that?

If not then something else may be wrong.
Let us know.

john
Basic Audio Pedals
www.basicaudio.net/