3 zone Yamaha type circuit

[jman 31]

I designed this based on the Yamaha three zone cymbal schematic the was posted HERE. I need to know if this is a workable circuit with Megadrum. It incorporates a main piezo, a modified KRC piezo/switch for the bell and a switch for the edge. Any thoughts would be greatly appreciated.

Thanks
Jman

EDIT: Incorrect image deleted by Jman 31

[jman 31]

Sorry, just added the circuit!

[dmitri]

I don't quite understand. If you have a cymbal with real edge and bell switches why are you complicating it with the circuit?

[jman 31]

I don't really like the bell switches that I have seen, and no I don't have a cymbal with real bell and edge switches. I am in the process of designing one and I want to put a piezo there because although it complicates the circuit, I believe it simplifies the build. stick a piezo on it with some two sided tape and it's done.

If you have an idea for a bell switch that looks and works as good as an over-the-counter product, I would be glad to see it. Oh and it needs to be on the underside of the cymbal.

Jman

[dmitri]

Your schematic confused me. It shows that the connections go to switches rather than piezos.

[jman 31]

Whoops, You are absolutely correct. Here is the revised. Sorry about that!

EDIT: Incorrect image deleted by Jman 31

[jman 31]

I bread boarded it and made a slight change. I moved the 10K resistor from the edge circuit to the bell curcuit. It was the only way I could get it to work. I am going to make a PCB for it this weekend and see if I can dial it in. I have to learn a lot more about the settings on the MD before I will have any success.

Here is the revised circuit.

[jman 31]

I built this circuit and it seems to work great. I will know more once it is installed on a cymbal. I played around with the threshold settings and got all three zones to trigger. Here is the PCB. It fits in a 35mm piezo buzzer shell. I will post some pics of it soon.

[jman 31]

I am at my wits end with setting up the 3-zone ride cymbal. I have tried all of the settings found in the 3-zone cymbal thread to the best of my knowledge. I get two zones no problem. I am assuming that it is the edge and the bow. I can not seem to get the bell no matter how hard I try. My setup is the schematic I show above.

One question, on the VU meter I get activity on the top 4th bar (bow?) and the bottom 4th bar (edge?). Every now and then I will get activity on the bottom 5th bar. Is that where I should be looking for the bell activity? Or is there even a bar for the bell activity? When it does trigger that 5th bar (which is rare) it makes a new drum sound.

I am using a 25mm piezo to trigger the bell circuit, could the smaller signal from that have anything to do with the problems?

Please Help, I'm getting very frustrated.

Thanks
Jman

Here is a picture of the cymbal

[dmitri]

One question, on the VU meter I get activity on the top 4th bar (bow?) and the bottom 4th bar (edge?). Every now and then I will get activity on the bottom 5th bar. Is that where I should be looking for the bell activity? Or is there even a bar for the bell activity? When it does trigger that 5th bar (which is rare) it makes a new drum sound.

Edge and bell activity are displayed on the same bottom bar. What you get on the next bottom bar is a crosstalk signal. Piezo/switch/switch support in MegaDrum is meant for a "piezo/real switch/real switch" cymbal. I cannot suggest any real settings for this circuit without testing its dynamic characteristics. I can only suggest to try setting thresholds with "Set All EdgeSw" and "Set All BellSw" from http://www.megadrum.info/content/miscelenous-settings .