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Originally posted by saba
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https://www.intersil.com/content/dam...l7/icl7662.pdf -
Thanks guys, on datasheet 5pin is output and 3 pin is grorund, why on sheamtic 5 pin is ground and 3 pin is input? or some mistake on pinout?ThanksComment
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Well, if I'm seeing right, it's obvious that it's a typo error, pin 5 is output and pin 3 should be ground. Strange is that orbit neglected to comment on his own schematic. Maybe it is not his schematic.Comment
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No, it's your chematics I almost everyone knows not to speak English .And if you do not understand shematic Then take a musical instrument ! the scheme is completely accurate and you banner deals with something else ,because you know little electronics ! Nobody gives me anything and be grateful to me and the guy who put the proto scheme ALtra, Jose ,otherwise would not see my scheme!Originally posted by dbanner View Post
It's a mistake in not knowing the matter on your part !!!!
Some guy from Turkey I sent him the pdf I think it's Saba scheme in pdf It's very clean and if she does not understand that's his problem !
Power can be solved in many ways this is just one way you are standing on the first barrier and what further ?
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Take it easy there. No need to get upset. The thing was blurry in the first place and the guy was asking for help, so you should have explained to him in the first place. Yes you are right, I am novice in electronics, but don't come here and insult me. As for schematics that people share here, always contain errors, so it was not beyond realm of possibility that this one also had error. Sometimes I get the feeling that some people knowingly post schematic with lots of errors just to intimidate people with small knowledge in electronics.Originally posted by Orbit View PostComment
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While we are grateful for any schematics, to insult us when we are wrong with trying to read blurry picture, well you might as well keep them for yourself.Comment
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Hi Orbit what they are saying is your picture is very low resolution , when you zoom in to read the values, the picture Pixelizes and is hard to look at, (nejasan) the picture just needs to be in higher resolution. the power.jpg picture is ok to read.Comment
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Some lost with forum At that moment you appeared a ba: nner mostly people from the Balkans are like this !
666 I can send you to the e-mail !Comment
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The damping resistance specified in this diagram is definitely on. My coil is 2 ohm .330 mh, 5 wat resistance even after a short time overheating and burning. Tx supply 12 volts. instantaneous consumption of the circuit 600 ma.I couldn't find a solution to this problem. I tested with many coils but the damping resistance was overheated and burned again. I used a current limiter on the circuit. I'd appreciate it if you could help me with the cause. In addition, as seen in the gs5 pictures around the ne5534 1m resistance is not specified in any diagram. This resistor seen in the motherboard pictures must be connected to which pins.
thanks
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The damping resistance specified in this diagram is definitely on. My coil is 2 ohm .330 mh, 5 wat resistance even after a short time overheating and burning. Tx supply 12 volts. instantaneous consumption of the circuit 600 ma.I couldn't find a solution to this problem. I tested with many coils but the damping resistance was overheated and burned again. I used a current limiter on the circuit. I'd appreciate it if you could help me with the cause. In addition, as seen in the gs5 pictures around the ne5534 1m resistance is not specified in any diagram. This resistor seen in the motherboard pictures must be connected to which pins.Comment
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I'm waiting for help from the masters. Please don't stay indifferent.Comment
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Post the schematic and PCB you have done, otherwise I have no solution for your problem.Comment
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These are NOT the same PCB's. Layout of each is completely different.Originally posted by ispanyol2 View Post
What Schematic are you using that Matches the PCB you have??
If you are burning a 470Ohm, 5Watt resistor then check for solder shorts with a good magnifier.Comment
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Aynı pcb yok. Bir yerlerde okudum. Forumdaki resimlerin pcb gs5a olduğunu düşünüyorum. Burada tekrar yayınlanan Türk şemaları Gs5b olmalıdır, çünkü şemada 3 jfet olduğu görülmüştür. Şemada gösterildiği gibi, Irf740'ı çalıştıran transistörün ucundaki direnç (470) doğruysa, transistör yanlıştır. Bu şekilde, Irf740'ı süremez. Bu konuda yayınlanan bilgilere göre Tx katı arızalı 470R daha önce belirttiğim direncin yandığını gösteriyor. bu şema ya hiç kimse yapmadı ya da sorunun farkında değil. Gs5'in orijinal mono bobin değerleri nedir? Kimse paylaşmadı ya da bir sır. TeşekkürlerComment
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The goldscan 5 detector has a frequency of 3.2Khz TX pulse duration of 100uS. According to the output voltage is 14.4V, the IRF passes a fairly high current from the 740 mosfet line. It is about 2.5-3ohm along with a fast coil of 3600uH, and the internal resistance and serial source resistance of 0.065ohm. The current is 600-700mA.
Now let's do some calculation:
14.4V / 3ohm = 4.8
4.8A / 1sn = 4.8A / 1000000 = 0.0000048A Current at 1uS Current at x100uS tx = 0.00048A Impact power at 1uS = 14.4Vx0.00048 = 0.006912W The power at 1sn = 0.006912x3200Hz = 22.1114W is spent.
The voltage and current on the damping resistance are exponentially
Let's make an account below.
Let's accept flayback vodka average 600V.470ohm 2w
damping resistance.600V / 470ohm = 1.27A
1.27Ax3200Hz = 4067A Of course, this is not a real figure.
but in practice, the damping resistance can be very hot.
Now here's my respectable Eric foster how did you fix this heat problem.?Comment
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