Vanishing point v2.1 pre-build questions.

[Valoosj]

As I am currently looking at making a wah/tremolo with the Vanishing point I have a few pre-build questions.

The schematic bit with the 4-6-8 mod has led me to discover a mistake in the original schematic. In the entire schematic you can see that the reset gate of the IC goes to lug 1 of the switch. In the mod schematic it goes to pin 2. Am I correct that this is a mistake in the original schematic (which might be the reason that so many people had troubles with the reset function)? The stage selector in the original schematic seems to have a wrong pinout as well.

If I want to leave the reset function out, would I just connect the reset pin to the middle lug of the stage selector switch? Which has to be and single on-off-on switch?

Is a VTL5C2 a good optocoupler for this project?

And last but not least, is there a program which I can use to draw up schematics, so I don't have to rely on paint and such silly programs.

Cheers!

[The Tone God]

The schematic bit with the 4-6-8 mod has led me to discover a mistake in the original schematic. In the entire schematic you can see that the reset gate of the IC goes to lug 1 of the switch. In the mod schematic it goes to pin 2. Am I correct that this is a mistake in the original schematic (which might be the reason that so many people had troubles with the reset function)? The stage selector in the original schematic seems to have a wrong pinout as well.

Its not an error. I used two different programs to draw each schematic. Each program designated switch pole numbers differently but the actual pole representation of the switch in the schematic is still the same. Middle pole of the reset switch goes to the the reset pin.

If I want to leave the reset function out, would I just connect the reset pin to the middle lug of the stage selector switch? Which has to be and single on-off-on switch?

Yes that should work. Yes it is an on-off-on switch. Be aware that without the reset switch even when bypassed the sequencer will run making it hard to sync. That is why most people use a 3PDT switch for bypass with the third pole as the reset function. Instead of the bypass LED you can see if the sequencer is running.

Is a VTL5C2 a good optocoupler for this project?

Sure but it really depends on the circuit you are hooking it up too.

And last but not least, is there a program which I can use to draw up schematics, so I don't have to rely on paint and such silly programs.

The search function and FAQ can provide you with those answers.

Andrew

[Valoosj]

Thank you very much for the replies.

About the VTL5C2, I looked at it's data sheet and it has a dark resistance of 1Mohm. The others all had higher dark resistance. I guess it will just be necessary to attach resistors in parallel to the LDR side. That way I should be able to make it work as I want it to.