Re: [DESIGN] Piezo-Piezo to Piezo-Switch Adaptor (by Keith Raper)

[PFozz]

Thanx Rogue 😉

> Do you mean I have to connect the two “+” of the piezos with a wire? or with a diode like circuit 1/3?

You should try with a diode.

> It seems you know how the circuit exactly works.

Actually, Keith Raper is the man of the situation 🙂
I’m formerly not into analog electronics but here’s what I understand from the schematics :

.D1 and D2 won’t allow a piezo xducer to make his buddy “buzz”.
.Q1 acts as a triggered switch : basically, if there’s enough current coming to its “base”, Q1 allow what’s coming from its collector to flow to its emitter.
.R1 limits the sensitivity (more the value is, less sensible will be the detection)
.R2 increases the sensitivity (more the value is, more sensible will be the detection)

In the 2nd circuit, the “main” piezo xducer determines the velocity of a hit, while the “aux” piezo xducer is use to trigger a kind of switch that determines which zone of your dual pad is played.

In circuits 1/3, if you’re playing the first mono pad, its piezo transducer is used to determine the velocity and basta.
If you’re playing the second pad, its piezo is used to determine the velocity of the hits and what’s coming from this same piezo will make the circuit “link” the ring and sleeve parts of your socket.

Hope this helps,
Best.

www.eareckon.com