So all you need to do is connect the output of the second op-amp to the inverting input (-). You already have the non inverting (+) input connect to ground so that correct.
I sent you a picture.
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servo connection revision
thank a lot so this is final should we wait for the other guys to comment about this connection? 🙂 just in case 😉 thanks again Mr. ST
thank a lot so this is final should we wait for the other guys to comment about this connection? 🙂 just in case 😉 thanks again Mr. ST
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Yes I have used this connection on my Soft start board. Its what you need to do.
Maybe consider looking at your trace width and creepage as I found a few possible problems. But I did not check it against the multisim file.
But from experience you may able to reduce your trace width to get better creepage. See attache photo
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good thinking ST
I'll see what I can do since I made the layout on a small area is gonna be dificult to use creepage rules I will try my best to adjusted the best I can no problem man 🙂
I'll see what I can do since I made the layout on a small area is gonna be dificult to use creepage rules I will try my best to adjusted the best I can no problem man 🙂
This is what I envision for the real "greenamp" class G.
You would have 700W x2 with the tunnel.
OS
You do not have to use the second op-amp. I grounded the unused one
and set it as a buffer.
As a buffer doing nothing , IC uses about 7ma.
As a inline active buffer , IC uses about 12ma.
Adding the buffer does nothing to the servo filter Fc.
OS
sorry OS about my confusion if servo use 1/2 of the TL072 I'm using pin 1 = A OUT pin 2 -N pin 3 +N pin 4 is V- and pin 8 is V+ as usual so having pin 5 to GND and pins 6 and 7 connected will not make any diference and it will work just fine? sorry for keep the same subject over and over I just want this to be sure
Vargas
Vargas
excellon is the cnc drill data
Okay it is sprint layout, damn I give you credit to draw these up referencing a ltspice schematic. No pin numbers on device to follow, man "OS" you make it hard for the layout department. 🙁 This is the way we did it 40 years ago 🙂
What is your 1/4W resistor lead spacing 10, 12.5mm?
Do you guys have any pcb outline standard to follow? FYI, I use 100x100mm since that is the max for the $2 for 10 special deal.
Okay it is sprint layout, damn I give you credit to draw these up referencing a ltspice schematic. No pin numbers on device to follow, man "OS" you make it hard for the layout department. 🙁 This is the way we did it 40 years ago 🙂
What is your 1/4W resistor lead spacing 10, 12.5mm?
Do you guys have any pcb outline standard to follow? FYI, I use 100x100mm since that is the max for the $2 for 10 special deal.
oh ok excellon ok, the 1/4W resistor have a pitch distance of 12 mm from pad to pad and I use only the Wolverine IPS board reference that jkuetemann made layout, the size is 76 mm x 100 mm and yes it was difficult but since I been doing this for about 5 years I got it this time even faster 🙂 good night is 12:59 AM time to sleep xD
Don't build my layout of the Greenamp V1.2
hello guys I still check the layout of the GreenampV1.2 please don't build it till I see all is correct I eventually order a few PCB to tested first I don't have a scope but at least put it together and tested with audio files so please don't build it, and I know that I post the sprint files here on this section for just revision only, Mr. OS most be really occupied doing the G-amp? I forgot, so I really don't want to bother him so he be concentrated on that, the layout I'm making is on me if I screw it up that be me no you guys so I'm gonna order and test it then I will let you know the result good or bad that be me if I made a mistake on the layout
Vargas
hello guys I still check the layout of the GreenampV1.2 please don't build it till I see all is correct I eventually order a few PCB to tested first I don't have a scope but at least put it together and tested with audio files so please don't build it, and I know that I post the sprint files here on this section for just revision only, Mr. OS most be really occupied doing the G-amp? I forgot, so I really don't want to bother him so he be concentrated on that, the layout I'm making is on me if I screw it up that be me no you guys so I'm gonna order and test it then I will let you know the result good or bad that be me if I made a mistake on the layout
Vargas
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If you look at post 10081 , the kypton's .... You see that I kept NFB away from any low level input. After the huge NFB waveform is reduced to a small one by either the 1M servo resistor or the 27-33k feedback resistor , it is ok to "mingle" with other small signals. Just something to consider. Look the layouts of my IPS's over , method to the madness.
OS
OS
NFB placement
I will take a look OS thanks, is that bad where a place the NFB faston terminal?, ok ok let me check post 10081, after check, I see what you mean the NFB faston or pad is preatty far away from the input I think I might be able to move down I hope so
Vargas
I will take a look OS thanks, is that bad where a place the NFB faston terminal?, ok ok let me check post 10081, after check, I see what you mean the NFB faston or pad is preatty far away from the input I think I might be able to move down I hope so
Vargas
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hello this is the last post about the servo U1 connections I found the layout of the Kypton - ND for what I understand pin 5 goes to pin 4 and 6 and 7 are going to be connected together is this correct? see image of the Greenamp V1.2 and Kypton - ND 🙂 I think my English is not clear 😀
Vargas
Vargas
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We have to move forward. (below).
Many of our beloved through hole components are obsolete , or about to become
that way.
A mix of through hole and SMD will have to be used to continue with our
hobby. Drivers, output devices , and electrolytic caps might be the only
survivors. All small signal , diodes , even leds ...smd.
The picture is representative of what the REAL greenamp might be like.
OS
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That is not mine , I will go denser.
Greenamp IPS might be a few postage stamps in size.
The output stage will have to be 5 X 15cm to facilitate big
components (caps , output transistors).
Some SMD is BIG. 5A dual Schottkey diodes are nearly TO-126 size.
OS
Greenamp IPS might be a few postage stamps in size.
The output stage will have to be 5 X 15cm to facilitate big
components (caps , output transistors).
Some SMD is BIG. 5A dual Schottkey diodes are nearly TO-126 size.
OS