wiring in parallel

[Br4d13y]

i am having trouble understanding wiring in parallel, i want to make one enclosure for two boards off one power jack, but i can't understand, help!

[frequencycentral]

Have a look a 'Stompbox Wiring' on Dano12's excellent website: http://www.beavisaudio.com/techpages/StompboxWiring/

As you're wiring two circuits, both boards +ve go to the same (centre) lug of the 2.1mm socket.

Both boards earths connect to the same point too

[Br4d13y]

thanks, it really shed some light on the situation

[sean k]

Well, I suppose it depends on what you mean by wiring FX in parallel. Is it 2 FX in the same enclosure that are self contained, but sharing a power supply, and will run in series or do you mean having one input and one output and having those FX actually in parallel?

If they are to be run in parallel Then the shared outputs need to be in phase with each other and summed in some way. Summing is where each output, though we most often see this summing in mixers where they are termed inputs, needs to have an equal resistance in series so that whatever input sees this output, it remains at the same impedance. So after the volume, or resistance to ground, you have a 10k resistor on each output that are joined at the very end to another 10k resistor.

The image above shows these 10k resistors in parallel from the outputs that need summing then you see a 22k resistor in the feedback of the opamp which would be 10k if the amp didn't add a little amplification but here it does. A little over x 2 but if it were a 10k then the gain would be at unity. Without the buffer the same principal applies.
It's, the image, from this site.
http://sound.westhost.com/project94.htm

[frequencycentral]

Well, I suppose it depends on what you mean by wiring FX in parallel. Is it 2 FX in the same enclosure that are self contained, but sharing a power supply, and will run in series or do you mean having one input and one output and having those FX actually in parallel?

I think he means two effects (Valvecasters) in the same box, the effects in series. He's unsure how to wire the two effects power inputs. Discussed earlier today on the Vibracaster thread.

[kurtlives]

I suggest picking up any basic elec book. The first three chapters usually cover series and parallel circuits, their applications, advantages/disadvantages and how to solve them.

[Br4d13y]

I suggest picking up any basic elec book. The first three chapters usually cover series and parallel circuits, their applications, advantages/disadvantages and how to solve them.

ok, that sounds good, i will try to make my way to the bookstore one of these days, thanks for all your guys help