Analysis this schematic

[Carl-NC]

First disconnect EVERYTHING except the transmit oscillator, coil driver, and coil. Get the transmitter working properly FIRST. Forget everything else until that is done.

Second, don't show any more waveforms unless you are using a 10x probe on the oscope.

[mohandes]

hi carl
so sorry me man for my bad english please talk to me simple,i think your means that i disconnect excess (just power supply and shematic in #1 onnection to gether)
then i connect search coil and check #21,it is your mean mr carl?
please guide me
thanks and regards

[Davor]

What Carl says is that you pull out all chips except the 555 and see what happens at the coil. If OK continue...
Next you plug in NE5534 and see what is on output. If OK continue...
Next plug in 4538 and 4053, and see if what they do makes sense. If OK continue...

[mohandes]

this is simple
thank my dear friend davor.ok i connect search oil for all time and adjustment One by one ics.
regards

[mohandes]

Hi all
can i use the RG58 cable for connect to coil or i should use the cable have a shield?
which is better?

[georgi.g.zhelev]

Hi all
can i use the RG58 cable for connect to coil or i should use the cable have a shield?
which is better?

RG 58 is OK!

[mohandes]

hi dear georgi
i check second pcb by multi meter when search coil connect and have problems i thinks,in #1 have multi turn and this value is 27k and i adjustment my multi turn on 27k but my output in pin6 ne5534 was6.9v,ok i adjustment that near-0.2v(because i think have ripple and the value gos up and down from -0.17 to-0.26v)
2- i put frist 4538 and check all pin by multimeter and OK
3- i put second 4538(U3) and chek 555 ,ne5534are OK but in pin10 have not 10v(i measure that and was -2.5mv)why?
4- i put 4053,all ics befor are good but i have -0.58v in pin11 not 10volt.

mr georgi i think if i solve U3 problem 4053 will good?any idea?say to me where is my wrong?

i put another measure for U:
pin2 555:-5.75v
pin3 555:-10.8v
drain irf:-0.07v


thanks and regard

[georgi.g.zhelev]

mohandes , My friend, you have a great desire, but you have no experience, it is best to quit P. Star ,stop. It is impossible to make a P. Star. SORRY. ОК?
(sorry for my bad english) .

[mohandes]

ok georgi
now i Comparison your figure and alexis maybe alexis have problem(like ne5532)
but tomorrow i chek with the oscope again but i can not realize what this problems:
3- i put second 4538(U3) and chek 555 ,ne5534are OK but in pin10 have not 10v(i measure that and was -2.5mv)why?
4- i put 4053,all ics befor are good but i have -0.58v in pin11 not 10volt.

if you guide me i am so happy
thanks and until tomorrow

[mohandes]

hi all
http://p30up.ir/up/c41by6nhbzye8l8jma7f.zip
this is my design in porteus.just now c11 and R23 is additional.
who an see that and guide me?so sorry it is not professional design.
thanks

[mohandes]

hi georgi
i Comparison the figures just i find this :
http://upload.tehran98.com/img1/uiqj0kcgrzukhi3der.jpg
it is ok?
i put my picture soon

[georgi.g.zhelev]

hi georgi
i Comparison the figures just i find this :
http://upload.tehran98.com/img1/uiqj0kcgrzukhi3der.jpg
it is ok?
i put my picture soon

NE5532.. ERROR !!!!!!!!! Must ...NE5534 ; LF 357.

STEP BY STEP !!!!!
1.Power Supply unit .......All voltages......OK!
2.U1..NE555...PIN 3..............................OK!
3 IRF 740 (D)..........500.....600V....osciloscope probe X 10 osciloscope VOLT/ DIV. MAX..........OK! (Attention ! oscilloscope damage)
4. NE5534 pin 6 .....................................OK!
5. U2 4538.......Q5 colector..... Sa ...10v/ 50 mks... OK!
6. Q6 colector ........ Sc .......10v/50mks.....OK!
7. Q7 colector ............................Sb ........10v/50mks ....OK!
8. U8 ...pin 1................0,6....08 v.................................OK!
Аnd so on , STEP BY STEP!!
SEE SHEMATISC AND OSCILOGRAMS (waveforms)!

[Tepco]

Do you have full schematic of this? Circuit is workable, in principle, but post full schematic here, with all details and power distribution scheme. Notorious problem wit similar circuits is front end op-amp, this time certainly not 5532, but in most “delta pulse” variations 5534 wont work either. If power distribution is similar to delta, LF357 is necessary, due to one extraordinary feature, inputs can be connected up to Vcc and few hundred mv above. Just about any other op-amp is unable to work connected like this, eventually try to find LF356 (357 is obsolete and expensive chip). From schematic posted on page 1 it is not visible how +\- 8V is supplied to op-amp and what is GND reference. Not having Proteus installed on this machine , i'm unable to check PCB, may be plagued with some small but important error in power distribution or component type\value. Do this detector use some sort of DC\DC converter to generate +8V above battery + rail, from where come +8V to 5534, referenced to what? If not, only LF356\357 can be used. Looks like your TX is working, high voltage pulse is very short, only uS or so, cannot be measured using multimeter. Post on your native language to PM if needed, will try to translate. Step by step, as with any incomplete or badly documented design.

[mohandes]

Do you have full schematic of this? Circuit is workable, in principle, but post full schematic here, with all details and power distribution scheme. Notorious problem wit similar circuits is front end op-amp, this time certainly not 5532, but in most “delta pulse” variations 5534 wont work either. If power distribution is similar to delta, LF357 is necessary, due to one extraordinary feature, inputs can be connected up to Vcc and few hundred mv above. Just about any other op-amp is unable to work connected like this, eventually try to find LF356 (357 is obsolete and expensive chip). From schematic posted on page 1 it is not visible how +\- 8V is supplied to op-amp and what is GND reference. Not having Proteus installed on this machine , i'm unable to check PCB, may be plagued with some small but important error in power distribution or component type\value. Do this detector use some sort of DC\DC converter to generate +8V above battery + rail, from where come +8V to 5534, referenced to what? If not, only LF356\357 can be used. Looks like your TX is working, high voltage pulse is very short, only uS or so, cannot be measured using multimeter. Post on your native language to PM if needed, will try to translate. Step by step, as with any incomplete or badly documented design.

Hi
ok i am read your post and put for you compelet design.
first about power supply it is ok
you say about the GND,and in pcb design i forget to put it so i connect all gnd by wire to all pcbs.
and again say i check my pcb and have not error(but in file 1.1ok shode c11 & R23 are additonal),If you want check again and tell me
yes Lf357 expensive i pay that for it about 1.5$.but in my design i should use the ne5534.

and please talk to me simple language because my english is bad.
http://www.uplooder.net/cgi-bin/dl.c...0c158c67a9119d

thanks man

[mohandes]

NE5532.. ERROR !!!!!!!!! Must ...NE5534 ; LF 357.

STEP BY STEP !!!!!
1.Power Supply unit .......All voltages......OK!
2.U1..NE555...PIN 3..............................OK!
3 IRF 740 (D)..........500.....600V....osciloscope probe X 10 osciloscope VOLT/ DIV. MAX..........OK! (Attention ! oscilloscope damage)
4. NE5534 pin 6 .....................................OK!
5. U2 4538.......Q5 colector..... Sa ...10v/ 50 mks... OK!
6. Q6 colector ........ Sc .......10v/50mks.....OK!
7. Q7 colector ............................Sb ........10v/50mks ....OK!
8. U8 ...pin 1................0,6....08 v.................................OK!
Аnd so on , STEP BY STEP!!
SEE SHEMATISC AND OSCILOGRAMS (waveforms)!

Hi my friend
ok you say step by step and i do this and it is incredible.first i put just ne 555 and check and it is ok! next i follow the pin3 ne555(or output) that i come to Q2 and cheke waveforms in base collector and emiter pin.
then i cheke all pins of bd140 ,next check irf740,and the finally i test D3 D4(or pin3 ne5534)and pin6.
my friend just see my picture please in the next post.