Tesoro vbreak mod help.

[Silver Dollar]

Since you are switching analog signals that go from +5 to -5 you need to supply the switch with +-5.
The 4053 is a little different. It may not need ground.

If the +4.5 is trying to be +5 it would be OK but make sure it is not a signal that will change.

You can usually find +-5 on the opamps. Ground is found by looking for a trace that goes around the PCB.
Post some pictures and we can find a good spot to get the power from...

[grizzly]

I will poke around with my multimeter and see what I can find. If not I will post a pic. I dont have a very good camera.

[grizzly]

Well here is the EDU schematic with the 4053 added in you would still need the other chip to control it...
[ATTACH]31637[/ATTACH]

There also was some info on 2 tones in the TGSL thread. There is a pcb available form silverdog;
http://www.silverdog.co.uk/shop/inde...product_id=132

And a modified schematic;
[ATTACH]31636[/ATTACH]

The modified schematic TGSL_2_aop link didnt work. Could you try it again. thanks

[Silver Dollar]

Well have a look in this thread; http://www.geotech1.com/forums/showt...GSL-2-tones-ID