Author Topic: My pll circuit  (Read 24552 times)

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Re: My pll circuit
« Reply #16 on: September 23, 2012, 20:04:25 pm »
Are you going to give us a schematic of your circuit?

 ;)

TS

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Re: My pll circuit
« Reply #17 on: September 23, 2012, 20:06:24 pm »
TS is the same schematic of the complete vic tony is selling, stans schematic... but i changed some values because with those values it was not working for me... i used the components i got here standard values for example 100k 10k 10nf 1nf 100nf 1k 1M the only different i got is 2,2k all other values i make with combinations therefrom...

ohh the only difference is the gate pulse generator which is a bit different since i use the 555 and a 741 to make it.. like all my olders schematics
things only changed in the sense that now i use 4001 instead of sn74hc02 because the lm318 wasn't working so good at 5 v

I use only one 1/10  cd4017... don't see why use more...

you need to work with the components you got there you got it...

Well this is the most affordable stable and simple pll frequency generator i ever achieved...

I'm using mainly 9 IC components... cd4046BE, HD4001, Lm318, cd4017, lm7812, lm7815, ir4427, NE555, LM741 AND, some small signal transistors 2N3904, diodes resistors and capacitors

i use the 15v only for the ir4427 chip.. because its better to drive mosfets..

the lm318 is a direct replacement of the ecg918 which i could't buy here...

The best configuration UNTIL NOW i found to be

R1=10k pin11-gnd
R2=10k+200k pot  pin 12-gnd
R3=100k pin 13-9
R4=10k damping resistor filter cap.->ground
R5=50k lock in resistor parallel with 1n4148 diode in the lock in circuit
C1=1nf - 11nf timing capacitor  pins6-7
C2=20nf filter capacitor pin 9-> damping resistor ->ground
C3=10nf lock in capacitor


With this components, i could achieve perfect lock in indication and lock in condition from 500hz up to 250khz...

i think could go higher lowering the timing capacitor... worth for tesla coils..

At lower frequencies it become non stable... so filter capacitor can be increased for that situations... i believe max 100nf is enough..
« Last Edit: September 23, 2012, 20:24:20 pm by sebosfato »

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Probably the vic cards you guys bought has hugely wrong connections
« Reply #18 on: September 24, 2012, 13:42:55 pm »
I was drawing a schematic of my current pll when i noticed that the schematic around for the vic production has huge problems...

Probably you got it completely wrong working...

They are connecting as the output of the frequency dividers 4017 instead of pin 12 which would be the 1/10 output, it wired at pin 11... look at the data sheet to see whats the difference...

incredibly at the vic images (pics) the 12 pin is used not the 11... check your circuits to see if i'm not right...

Basically your circuits are not 1/10 , it puts out 1 pulse for each 10 pulses coming in... completely wrong!!!!!!!!!!!!!!!!!!!!!!!!!!!

You are welcome...

Notice at the first attachment that this drawing was a copy of the vic and this is indeed correct...

However at the 2 and 3 attachment wherever you look its wrong wired!!!!

Last but not least...
the 4 attachment is my schematic... on progress... should be 100million times better...
no resonant scanning connected...
feedback circuit corrected too...
The gate generator goes from 0 to 100% duty cycle---

Strange enough all my schematics was correct and worked as thought using the pin12 of the 4017... since 2008

was this a confusion only by their side while making the drawings?
hope so
but how many are around?
anyone found this issue?
oh boy

If you bought those cards and they are wrong as i pointed you can simply disconnect from pin 11 and connect to pin 12... your lucky its close to one another...

please someone tell those guys using it and selling it, about this...

If any of you feel thank full by any reason...

i'm accepting help...
« Last Edit: September 24, 2012, 14:14:52 pm by sebosfato »

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Re: Probably the vic cards you guys bought has hugely wrong connections
« Reply #19 on: September 24, 2012, 15:29:15 pm »
I was drawing a schematic of my current pll when i noticed that the schematic around for the vic production has huge problems...

Probably you got it completely wrong working...

They are connecting as the output of the frequency dividers 4017 instead of pin 12 which would be the 1/10 output, it wired at pin 11... look at the data sheet to see whats the difference...

incredibly at the vic images (pics) the 12 pin is used not the 11... check your circuits to see if i'm not right...

Basically your circuits are not 1/10 , it puts out 1 pulse for each 10 pulses coming in... completely wrong!!!!!!!!!!!!!!!!!!!!!!!!!!!

You are welcome...

Notice at the first attachment that this drawing was a copy of the vic and this is indeed correct...

However at the 2 and 3 attachment wherever you look its wrong wired!!!!

Last but not least...
the 4 attachment is my schematic... on progress... should be 100million times better...
no resonant scanning connected...
feedback circuit corrected too...
The gate generator goes from 0 to 100% duty cycle---

Strange enough all my schematics was correct and worked as thought using the pin12 of the 4017... since 2008

was this a confusion only by their side while making the drawings?
hope so
but how many are around?
anyone found this issue?
oh boy

If you bought those cards and they are wrong as i pointed you can simply disconnect from pin 11 and connect to pin 12... your lucky its close to one another...

please someone tell those guys using it and selling it, about this...

If any of you feel thank full by any reason...

i'm accepting help...

Thanks Sebosfasto, I'll be checking mine.  I also want to get frequencies above the 10kHz current setup too.  Glad we have people who have got a good eye for circuits.

TS

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Re: My pll circuit
« Reply #20 on: September 24, 2012, 18:30:10 pm »
How about it, could you imagined it?  8)

hope is easy enough to get around this problem.... you can cut the 11pin from the chip and put the 12 on the 11 hole...

or you can simply solder a small wire...

waiting to see if it were wrong or correct just for fun...

I'm now working to get this pll to do what i want it to do!!! hydrogen!

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Re: My pll circuit
« Reply #21 on: September 24, 2012, 19:58:14 pm »
I'm impressed that its being a while since this schematics are up there... i newer tried it because i was always working at my own designs... thats why only now i found this errors...

strange enough

Did you found it? 

I guess you will be able to lock in better now TS...  ;)

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Re: My pll circuit
« Reply #22 on: September 24, 2012, 20:00:38 pm »
Anyone noticed it?

My board is wired to pin 11.

TS

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Re: My pll circuit
« Reply #23 on: September 24, 2012, 20:05:16 pm »
so i guess i was correct... try to do the modification i explained exchanging the 11 by the 12 and now it should be ok!

I'm happy that i was not wasting my time somehow looking into that...