Why stereo input and mono output on a stompbox?? (BSIAB2)

[syzygy]

The BSIAB2 schematic shows a stereo input (tip ring sleeve) and mono output (tip sleeve): http://www.generalguitargadgets.com/diagrams/bsiab_2_lo.gif

What advantage does the stereo input have?  And why is the output just a mono connection?

Thanks!

[barret77]

Hi

The stereo input works as an on-off switch; it avoids the battery to be drained when disconnected...

[Pedal love]

Yes this is correct. It causes a basic short/open cituation between the battery and ground as the input cable is plugged in and unplugged, causing the circuit to turn on and off.

[Mark Hammer]

Virtually ALL stompboxes that use a 9v battery, both commercial and DIY, employ this technique.

[syzygy]

Ahh, that makes complete sense. Duhhh. I've always thought of unplugging my pedals to stop battery drain, but now that I'm looking at an actual circuit, I've forgotten all about that.

[Mark Hammer]

Well that's the problem with making things look easy, isn't it.  Pretty soon people stop remembering that something actually has to HAPPEN for easy-looking things to take place.  :lol: Not to worry.  It's a big hole that many fall into.

[Incubus]

I told a guy I was in a band with years back, that once you plug something into the input socket on a Boss pedal, it draws current even if the actual effect is turned off.

He called me a liar.

He's not in a band anymore.

[Mark Hammer]

Maybe, but I'd bet he does a bitchin version of 4'33" with all those pedals plugged in!

(See moogerfooger thread)

[H.Manback]

:lol: let me guess, he always had to play clean at gigs :wink:

[petemoore]

You'llhave that, Ihad This...If the engine is spinning faster then it Uses More Gas. Period.
 I had just attempted to explain how the accelerator pedal controls a valve, and when fully released the valve is closed, only the idle valve remains open [on an old Rambler with bad brakes]...lol.