Vanishing Point assistance please...

[no one ever]

Hi.

I'm having trouble contemplating the offboard wiring for Andrew's Vanishing Point... using this layout :



and this schematic (hope you don't mind me directly displaying the image).




If anyone can help me with the offboard wiring (mainly, Vcc, the optocouplers, and the wiring of the random switch), it would be much appreciated.... bernarduur?

Oh, and is this layout verified? I'm studying the schem and layout right now, and I think I see discrepancies...

[The Tone God]

If anyone can help me with the off board wiring (mainly, Vcc, the optocouplers, and the wiring of the random switch), it would be much appreciated.... bernarduur?

The Vcc/V+ and power supply ground are on the left. The random optocoupler is on the right. It lays flat with the LED toward the bottom. The LDR connects to the top. The cathode/flat side of the LED faces the left toward the 1K resistor. The effect optocoupler you wire off board with the stage pots.

The random switch is a DPDT. The "Clock" line goes to the center of one pole. The "Enable" also called "Inhibit" line connects to the center of the other pole.

On one half (left or up depending on how you are holding the switch) the pole that the "Clock" line is connect to gets connected to the line called "RandClk". The other pole connected to the "Enable"/"Inhibit" line get the connection to "RandEnable".

On the last half (right or down depending on how you are holding the switch) the pole that the "Clock" line is connect to gets connected to the line called "SeqClk". The other pole connected to the "Enable"/"Inhibit" line get the connection to ground.

The pin numbers on the schematic and the PCB do match.

Oh, and is this layout verified? I'm studying the schem and layout right now, and I think I see discrepancies...

Yes I have built it. I don't know about anyone else. Most people seem to have made their own boards for it. Where do you think there is a discrepancy ?

Also did you check out the thread I made awhile back about some updates and also the recent thread about decoupling the power supply ? Those will be handy as well.

I really should get around to updating that thing.

Andrew

[no one ever]

Thanks Andrew!


you're right, I dont' see any errors either... I haven't gotten much sleep lately, and its hard to study a schematic while listening to a Tom Morello solo   

[nelson]

I really should get around to updating that thing.

Andrew

Why not have a paragraph on the "step" function mod?

[no one ever]

Why not have a paragraph on the "step" function mod?

why not.




here's the annotated diagram, for future reference:





oh, and what optocoupler do you suggest?

[The Tone God]

Thanks Andrew!


you're right, I dont' see any errors either... I haven't gotten much sleep lately, and its hard to study a schematic while listening to a Tom Morello solo   

Your welcome. Its ok I have some Audioslave and RATM in rotation right now too so I can forgive.

Why not have a paragraph on the "step" function mod?

Ouch. Feels like my arm is being twisted.

here's the annotated diagram, for future reference:

Do forget the changes I posted awhile back for things like the reset pull down resistor.

oh, and the green LED is for the optocoupler's LED side I assume?

Correct.

I've been getting alot of posts/PMs/Emails about The Vanishing Point lately. I'll try to have an update soon with all the changes to resolve some of this.

Andrew

[no one ever]

Do forget the changes I posted awhile back for things like the reset pull down resistor.

done 


looking forward to an update, sir.

[The Tone God]

done 

looking forward to an update, sir.

Opps. I meant Don't forget the changes. I made them in these threads:

http://www.diystompboxes.com/smfforum/index.php?topic=28396.0

http://www.diystompboxes.com/smfforum/index.php?topic=43976.0

Nice diagram BTW.

Andrew

[no one ever]

Opps. I meant Don't forget the changes. I made them in these threads:

http://www.diystompboxes.com/smfforum/index.php?topic=28396.0

http://www.diystompboxes.com/smfforum/index.php?topic=43976.0

Nice diagram BTW.

Andrew

thanks! Paint is a wonderful program, isn't it. 



Assuming from my forum searches, these 40106-based modifications apply to the 4093 as well?

[The Tone God]

Assuming from my forum searches, these 40106-based modifications apply to the 4093 as well?

Yes I belive they should apply to both. The only differece with 40106 is that I used a spare gate to drive a clock LED so you can see the speed of the clock without having to watch the LED sequence through.

Andrew

[no one ever]

Thanks a lot, Andrew. 


a few more questions:

• So the numbers inside the 4093 diagram are the step numbers? Then what are the numbers outside?
• If the SPDT for the reset point was Center OFF, what would be the effect of the OFF position?
• Are there any SP4T toggle switches? (4/6/8/10 step selector)
• Does the choice of optocoupler in the sequencer circuit matter much?

[hank reynolds 3rd]

Thanks a lot, Andrew. 


a few more questions:

• So the numbers inside the 4093 diagram are the step numbers? Then what are the numbers outside?

the pinout of the IC

• If the SPDT for the reset point was Center OFF, what would be the effect of the OFF position?

I think it goes through all 10 stages in the off position...

• Are there any SP4T toggle switches? (4/6/8/10 step selector)

there's 3p4t available, like these  ....   http://www.rapidelectronics.co.uk/rkmain.asp?PAGEID=80010&CTL_CAT_CODE=&STK_PROD_CODE=M30304&XPAGENO=4  ....should do the trick

• Does the choice of optocoupler in the sequencer circuit matter much?

the LDR part of it (it's on /off resistance) will affect the circuit it is a part of...for example if you used this in a mcmeat/neutron autowah ,one of the vactecs recommended or an NSL32 would make sense...

[no one ever]

thanks hank!

i knooow about rotary switches, just wondering if anyone knew of slide switches or anything like that.