Sanity Check: Echorec Rotary Switches

[Big Monk]

Head Selector looks like 1P12T?

Type Selector looks like 2P3T?

@Robert Does your source for the miniature rotaries have these configurations?

 

[Big Monk]

Thinking on the head selector, all the combos with a single pole switch is not possible.

It’s confusing and there is nothing on the webs about how to wire it.

 

[benny_profane]

Thinking on the head selector, all the combos with a single pole switch is not possible.

Doesn’t it use a 12-position switch and omit four of the possible combinations?

 

[Big Monk]

Doesn’t it use a 12-position switch and omit four of the possible combinations?

I guess I’m trying to understand the connections required to get the various combos.

The Binson schematics only show connections to 4 of the poles.

 

[Big Monk]

 

[benny_profane]

It’d probably be a bit cleaner to use CMOS switching logic. Otherwise you’re looking at a bit mess of nets.

 

[Big Monk]

It’d probably be a bit cleaner to use CMOS switching logic. Otherwise you’re looking at a bit mess of nets.

Right? I imagine a ton of jumpers to implement the rotary.

 

[Big Monk]

Decided to keep the 2P3T for the mode selector but use switches for the heads:

 

[Bricksnbeatles]

Seems like a great choice to me! I’ve got to assume the use of a rotary switch over toggles or radio-style buttons for the head selection in the original was a matter of either cost or availability. Looking forward to seeing this as it comes to fruition!

 

[Big Monk]

Seems like a great choice to me! I’ve got to assume the use of a rotary switch over toggles or radio-style buttons for the head selection in the original was a matter of either cost or availability. Looking forward to seeing this as it comes to fruition!

The goal is kind of opposite to standard emulation practice: It’s going to have less flexibility but hopefully a sound that captures the Echorec.

You’ll notice there is no delay time control. The idea is to use the original Echorec system of fixed delay time per tap/head. What I’ll likely do is include internal trimmers for adjusting each heads delay time in a specific range.

 

[Big Monk]

I spent quite a while last night looking for a mini 2P3T mini rotary.

Could not find one I liked. I had not planned on any kind of modulation for the repeats on this build but I think I may use the 2P4T rotary sold here and add a second repeats mode with internally set modulation.

 

[Diynot]

Have you looked at the Sagan delay? It’s only 3 “heads”, but you could probably figure out how to add a 4th.

 

[Big Monk]

Have you looked at the Sagan delay? It’s only 3 “heads”, but you could probably figure out how to add a 4th.

Yup. The Sagan is definitely in my data pool

 

[dan.schumaker]

Good looking project! I've been working on one of those as well!

 

[Big Monk]

Good looking project! I've been working on one of those as well!
View attachment 46653

Awesome! I need to revise my graphics today to reflect the extra mode position.

 

[JamieJ]

Please show us the guts @dan.schumaker !!

 

[Big Monk]

Revised graphics: