Bogner La Grange  [traced]

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Re: Bogner La Grange

Postby Lithium_Grim » 26 Nov 2017, 12:12

Sorry for my late reply.. life got in the way :D

A couple of observations:
    1. Boost should be after the main effect not before.
    2. The IN of the boost goes to a 1M resistor to ground (pulldown resistor) and the 100n capacitor
    3. There are some electrolytes in your schematic that are missing polarisation annotation (eg. the 33uF and 47uF caps have no +/- indication)
    4. J1 is optional to connect pin 1 and 8 in case you will be using a 7660s. It can be omitted when using a LT1054.

PS if anyone is interested in a PCB, I will have them within a few weeks.
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Re: Bogner La Grange

Postby FeVeR2112 » 26 Nov 2017, 12:23

PS if anyone is interested in a PCB, I will have them within a few weeks.


Yes, please.


Also.... did anyone figure out what the PIC16f1823 microcontroller chip is doing in the original box?
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Re: Bogner La Grange

Postby Lithium_Grim » 26 Nov 2017, 15:08

Also.... did anyone figure out what the PIC16f1823 microcontroller chip is doing in the original box?


Yes, they control only the 3pdt relays and have nothing to do with the effect it self. It is a way to use soft touch switched to control the relays. The effect itself is 100% analog.

Anyone interested in a PCB can send me a PM. PCB ize 10x5 cm needs a 1590BB or bigger.
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Re: Bogner La Grange

Postby Manfred » 27 Nov 2017, 01:01

I have modified the drawing except for the boost circuit.

Boost should be after the main effect not before.


Where should the boost circuit be insert?

On which point in the ciruit the input signal is feeded in?
On which point in the ciruit ends the main effect part?

There is a 1uF coupling capacitor, is that an electrolyte or foil type?

BognerLaGrange3.JPG
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Re: Bogner La Grange

Postby Lithium_Grim » 27 Nov 2017, 08:00

?? You drew the schematic and marked the boost yourself didn't you? Just take the boost part incl switches and put it after your current output.

Looks like a foil capacitor. Use any (MKT/WIMA/SMF)
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Re: Bogner La Grange

Postby Saruman » 27 Nov 2017, 18:54

the boost part put in after output

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Re: Bogner La Grange

Postby Lithium_Grim » 27 Nov 2017, 19:37

Saruman wrote:the boost part put in after output


Yup, send me your latest schematic and I'll change it :)
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Re: Bogner La Grange

Postby Manfred » 28 Nov 2017, 00:27

The part of circuit for boost has been moved to the end.

BognerLaGrange4.JPG
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Re: Bogner La Grange

Postby Saruman » 28 Nov 2017, 08:03

Manfred,scheme true :applause:

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Re: Bogner La Grange

Postby Intripped » 28 Nov 2017, 13:09

Probably the 53R resistor in the box of rock part, is a 47R; I've looked deeply at Saruman's pic, and that resistor seems to be yellow-purple-black -> 47R

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Re: Bogner La Grange

Postby Manfred » 28 Nov 2017, 16:26

Intripped wrote:Probably the 53R resistor in the box of rock part, is a 47R; I've looked deeply at Saruman's pic, and that resistor seems to be yellow-purple-black -> 47R


53R -> 47R done.

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Re: Bogner La Grange

Postby Thimotti » 29 Nov 2017, 01:23

Hi, please, verify the Mosfet Structur schematic. I think that something is wrong.
The left mosfet is short circuited.
And about the 47nF that is in parallel with the struct "diodes" ? I don't see him in the first schematic posted here.
For the LT1054 Inverter, the pin 3 need to be grounded. Can you confirm?
The 100uF from LT1054 is inverted.

Thanks !

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Re: Bogner La Grange

Postby Thimotti » 29 Nov 2017, 03:39

Thimotti wrote:Hi, please, verify the Mosfet Structur schematic. I think that something is wrong.
The left mosfet is short circuited.
And about the 47nF that is in parallel with the struct "diodes" ? I don't see him in the first schematic posted here.
For the LT1054 Inverter, the pin 3 need to be grounded. Can you confirm?
The 100uF from LT1054 is inverted.

Thanks !


Found the 47nF !
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Re: Bogner La Grange

Postby Manfred » 29 Nov 2017, 07:06

Thimotti wrote:Hi, please, verify the Mosfet Structur schematic. I think that something is wrong.
The left mosfet is short circuited.
And about the 47nF that is in parallel with the struct "diodes" ? I don't see him in the first schematic posted here.
For the LT1054 Inverter, the pin 3 need to be grounded. Can you confirm?
The 100uF from LT1054 is inverted.

Thanks !


Thanks for having a closer look.
Corrections done.

BognerLaGrange6.JPG
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Re: Bogner La Grange

Postby Lithium_Grim » 29 Nov 2017, 09:21

Thimotti wrote:Hi, please, verify the Mosfet Structur schematic. I think that something is wrong.
The left mosfet is short circuited.
And about the 47nF that is in parallel with the struct "diodes" ? I don't see him in the first schematic posted here.
For the LT1054 Inverter, the pin 3 need to be grounded. Can you confirm?
The 100uF from LT1054 is inverted.

Thanks !


The 47n is found in this schematic viewtopic.php?f=7&p=261144#p261144 and based on the message of intripped here viewtopic.php?f=7&p=259404#p259404
Yes pin 3 should be grounded and yes, the polarity of the 100 u on the -9V is inverted.

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Re: Bogner La Grange

Postby Lithium_Grim » 29 Nov 2017, 11:07

Looking at the trace again I think the schematic of the "stucture" part is wrong as Thimotti might also have implied.
If you look here:
struct cutoutpng.png


Structure switching
You see that first off it is a DP3T (on-on-on) and not a SP3T (on-off-on). In the left position it would use both the 1n270 and 2n7000, in the center position the 1n270 combined with the LED's would be used and in position 3 only the LED's are used. You can see in the picture showing the sides of the switches that I'm right about the on-on-on part.

Structure capacitor
I also see that there is a small cap C1 in series with pin 2 of the "structure" switch. It looks like this is the mentioned 47n. If so, I made a wrong comment in the post above. I do not see the mentioned 47n go to ground so I think that it might be a mistake in the schematic. Anyone able to confirm? Can anyone also confirm the actual value of 47n?

Looking at the first schematic of saruman on page 1 I see that it is drawn correct there, but saruman changed it in his next drawing to match the COT50 I guess.
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Re: Bogner La Grange

Postby Manfred » 01 Dec 2017, 10:05

There are three types of ON-ON-ON miniature switches, these differ in the switching scheme.

ON-ON-ON_switch types.jpg


I have examined which switching scheme could work and found that only the switch type 3 met the requirements.

BognerLaGrangeStructure1.JPG

BognerLaGrangeStructure2.JPG

BognerLaGrangeStructure3.JPG
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Last edited by Manfred on 01 Dec 2017, 10:12, edited 1 time in total.
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Re: Bogner La Grange

Postby Lithium_Grim » 01 Dec 2017, 10:11

Only sauruman can say which type of switch it truly is. The most common type of on-on-on switch is the switch you marked as 3. Type 1 i've never used/seen and type 2 is the same as type 3 just reverse, so you can make the same settings with that one as with type 3, just mirror the pins.

Edit: I also depends on if you are looking at the pins from above or below :D I alway have the same problem with transistors and datasheets :evil:
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Re: Bogner La Grange

Postby Manfred » 01 Dec 2017, 11:31

Only sauruman can say which type of switch it truly is.

Have a closer look at my explanations regarding the diode threshold voltages, using the type 3 switch is the only reasonable solution.

type 2 is the same as type 3 just reverse

You are right, but some switches have a nut in the thread to fix the mounting position.
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Re: Bogner La Grange

Postby Lithium_Grim » 01 Dec 2017, 11:45

Why do you have an arrow going to the right of the switch? The cap is in series with pin 2 and not in parallel.

Edit 1: I see you did not insert the 47n in series... my bad, maybe add it?
Edit 2: agree that the option 3 switch would be the most logical one.
Edit 3: hmmm quite a waste of other good asymmetrical instead of symmetrical clipping options btw. would be nice to combine the GE with LED, GE with mosfet or mosfet with led.
edit 4: also a good read: http://www.instructables.com/id/Add-Dio ... uitar-Amp/ has some nice info on the diodes and symmetrical/asymmetrical clipping.
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