Transceiver Circuit

[kellys_eye]

Where should I connect the speaker?

Where the schematic tells you to.

 

[Ty Ban]

Where the schematic tells you to.

the negative to the ground and the positive is to the transmitter or to the receiver?

 

[kellys_eye]

The schematic shows the speaker connected to the common pin of a change-over switch that is part of the transmit/receive push button.

 

[Irv]

I think the question is how to find which "common" or center pin on that multi-pole switch is the correct one to connect the speaker to. If, like most really cheap stuff, they didn't bother to run traces out to a neat, nicely-labeled solder point on the edge of the board, then how to determine where the lead would have been connected? Other than visually tracing with a magnifying glass?

 

[Ty Ban]

So what's their common pin?

 

[davenn]

I think the question is how to find which "common" or center pin on that multi-pole switch

So what's their common pin?

there ISNT a single common there are 4 commons for the 4 switches
those 4 switches just happen to be tied together in a single package to that when 1 is operated, all of them operate at the same time

 

[Ty Ban]

there ISNT a single common there are 4 commons for the 4 switches
those 4 switches just happen to be tied together in a single package to that when 1 is operated, all of them operate at the same time


View attachment 36028

Here is the connection of the switch, where should I connect the speaker? Or does any of that four is ok?

 

[CDRIVE]

I believe the pins I've marked "C" are the common pins for the 4 groups of SPDT contacts. The pins directly above and below each common are the two poles for each SPDT switch.
Because they're packaged as a single switch package this switch is classified as a 4PDT slide switch.

Chris

 

[Audioguru]

This is how the switch works:

 

[Ty Ban]

When I translate it in the actual pcb layout, does the copper for the pin ( the pin before the common pins ) is connected to the copper of the common pins?

 

[CDRIVE]

When I translate it in the actual pcb layout, does the copper for the pin ( the pin before the common pins ) is connected to the copper of the common pins?

No! What AG drew are not jumper wires or copper traces. They're movable bars internal to the switch. He's indicating which contacts are closed (shorted) in the switch positions indicated.

Chris

 

[Ty Ban]

No! What AG drew are not jumper wires or copper traces. They're movable bars internal to the switch. He's indicating which contacts are closed (shorted) in the switch positions indicated.

Chris

So you mean that in the pcb, all 12 pins have individual copper and non are connected to each other ? (just like what I send in the picture)

 

[CDRIVE]

So you mean that in the pcb, all 12 pins have individual copper and non are connected to each other ? (just like what I send in the picture)

Yes, that's correct. This [ and this ] are inside the switch.

I tried to find an animated slide switch on the net but didn't get any hits. The visual would help you understand.

Chris

 

[Ty Ban]

Yes, that's correct. This [ and this ] are inside the switch.

I tried to find an animated slide switch on the net but didn't get any hits. The visual would help you understand.

Chris

And those 4 arrows will be connected to their 4 common pins, is that right?

 

[Ty Ban]

Another, is the arrow above the 39n is a potentiometer?

 

[Audioguru]

The arrow above the 39nF capacitor is the slider of a 10k ohms potentiometer. It is used only when the switch is in the Transmit mode. What do you think it adjusts?

 

[Ty Ban]

The arrow above the 39nF capacitor is the slider of a 10k ohms potentiometer. It is used only when the switch is in the Transmit mode. What do you think it adjusts?

The volume? What the slider is for?

 

[Ty Ban]

The volume? What the slider is for?

Thus I need a slider potentiometer or just a potetiometer ?

 

[Audioguru]

A potentiometer is a resistor with a slider (the arrow) that you can slide along the resistance. You can move the slider anywhere from one end to the other end of the resistance or anywhere in between.
Take a potentiometer apart to see the resistance and the slider.

 

[CDRIVE]

And those 4 arrows will be connected to their 4 common pins, is that right?

The arrows "indicate" the 4 common pins.

Ty, you really should spend some time reading our basic electronics section.
Chris