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Dazza

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Everything posted by Dazza

  1. Ante, I just had an idea on solving the problems with the regulator, in keeping the 12 volt battery isolated, from the varying voltage. Does this looked like it will work in principle. I have basically isolated the stator from the field coil. It's a bit muddy at this stage as usual ;D.
  2. I don't know why anyone would bother with a fax machine, when you have a computer. I send and receive faxes with my fax modem which is very old. It is a little slow but does the job well :).
  3. Ante, I have a question about the six diodes, for the three-phase. If my maximum current was to be 200A, what would the maximum amperage need to be for each diode. Would it be about 33A four each diode, plus a little headroom.
  4. Ante, at our local tips we have recycling plants, and dump rats as they are known as. These are people who own the scavenging rights, and sell anything and everything that they find, that may have some value. I'm a little reluctant to pay good money for something, and find after I've taken it home and pulled it apart, that there is nothing useful in their, and then I give it back to them for free, by throwing it in the rubbish. Ante, I have yet another question about paralleling components. I asked about the chohe, for the reasons that if I can't get one, that can handle the current. Can diodes be paralleled for the bridge rectifier. I can get a hold of plenty of diodes from old alternators for next to nothing, and parallel them to handle the current. Ante, I think it is called CAPCAM. 8)
  5. I am glad to hear that I am not the only one, that finds Eagle PCB hard to use :P. Maybe there's a special class somewhere that you can attend, sometimes it seems like there should be :o ;D ;D.
  6. (ISD256OP). 60 Ses voice recorder. Is around $20 Australian. It's just a matter of hunting around to find the best price. There is a good chance, that manufacturers would be willing to send you a heap of these ICs as samples. I think it would be possible to make them for less than $20 each Australian. You are likely to find the prices vary quite a bit, from the different manufacturers of these ICs. And if you buy in large quantities, usually you get a good discount. I haven't made one of these devices yet, so I don't know how good the quality is. So putting one together would probably be a good starting point, so you know if it's going to do the job.
  7. martintheis, here is a start. I think this device will record for 20 seconds.
  8. Ante, I don't like it when you say, I don't know. I think from now on this phrase is reserved for me only ;D ;D. Ante can you suggest the type of equipment, that I am likely to find large capacitors in. Ok using large capacitors should solve the problem, of having some power available to supply the reactor, while giving enough time for the regulator alternator to respond. I am a bit worried about what will happen, when the reactor is drawing its maximum current, and then wants to reduce down to zero rapidly, I can see a situation where there is a lot of current width nowhere to go. Ok having a dampening effect will help. Ante, can you think of any way of dealing with this excess current with nowhere to go.
  9. Yes ante, I am at a bit of a loss, on how to tackle this problem. If we were to add a large capacitor, we would be asking it to do the job, of a battery. I am thinking that this will be a capacitor of very high capacitance very expensive. Would a recycled capacitor. from a microwave be able to be used, what do you think I could be doing here ante? Yes ante, I can see your catch 22 scenario. There is something that I have left out of the block diagram, that will help (lessen some) of these problems. A device between the pressure sender unit, and the adjust pulse width 12V to 24V. the idea of this device is to (dampen) the possibly fast reaction of the pressure sender, if pressure was to drop dramatically, because of demand from the engine for the hydrogen. So the dampening effect is needed, to lessen the demand on the rest of the system, to respond so quickly. now implementing this dampening effect, will mean there isn't adequate hydrogen to supply the engine. So to fix this problem, a small storage chamber, immediately after the reactor chamber, to hold enough hydrogen for these extreme demand hydrogen fuel situation. For example a vehicle towing a heavy trailer, overtaking a vehicle up hill. This hydrogen chamber, I believe will not need to be much larger, than the supply line itself. Therefore not being a significant storage risk. Now that being said, I do fear using higher voltage, could result in the possibility of arcing, within the hydrogen chamber of the reactor, if the separation of hydrogen and oxygen is less than perfect. So I need to apply caution here, the water will have an additive to it to make it more conductive, and the higher the voltage,the more opportunity there is, for a spark to jump between the electrode, and in respect of the electrode spacing. If I could be sure, that there was only hydrogen within this part of the chamber than a spark would not result in ignition. Now realising this possible risk, in using higher voltage, I feel that the maximum of 24V, should keep me safe. Now am I understanding this right ante. I have a 12V alternator I am wanting it to produce upwards to 24V. so to achieve the higher voltage. I will be compromising the amperage output. Now this is in respect of the number of windings, within the alternator stater, which will ultimately limit my voltage output. I have read on the Internet that 110V is quite possible, with of course the compromise of the amperage output. So if I was to discover the ideal voltage for this system, to be say 17V. I could then modify the alternator, to be ideally suited for this situation in respect of, the thickness of the wire, to the amount of turns required, and of course the RPM the alternator will require. ante, the information in the link you provided, will prove to be very useful in this project. I was surprised to find myself in the top 15 post. I would say you would have hit the 1000 post by now ante, my question is, do you get to choose the colour of that free LED ;D ;D.
  10. Ante, can you make sense, of this block diagram.
  11. Yes ante, I got started on a block diagram today that is something I probably should have done from the start. Then you'll have a better idea of the big picture, and how everything needs to interact. Instead of me asking you to help me set this system up, only knowing half of it. Well ante I have never had to put anything down on paper, before putting it altogether, and I have been involved in construction of all sorts of things, from building trailers to carry 4D dozer to a light boat trailer and farm implements even an experimental Cain harvester. To construct such machinery and make it work the way it should, for me isn't too difficult, I'm able to visualise the entire system and no how it should work, and then just go ahead and put it together. So putting my ideas down on paper, and trying to explain it to someone half a world away, is something new to me. Ok step 1 is right. 2 as soon as the engine is running, engaged the 24V supplied from the alternator, with PWM control, to power the reactor. No I don't need varying voltage. I would just like to be able to set the voltage.Say I want 17V, I can then set the regulator to that, and run the reactor, and then compare its performance with other voltage, combinations of different catalyst, more and less catalyst different electrode spacing and so on. And of course trying to produce as much hydrogen with as little current as possible. Having to use higher current, would probably mean having two use, a larger engine in a smaller vehicle. To still maintain the performance of the vehicle, and also be able to run the reactor. Who cares when the fuel is free ;D. I would really like to try to avoid using two alternator's. I picked up and 85A alternator from the wreckers cheap that needs new Barings. The really isn't much room on the stator, to use heavier gauge wire. I'm hoping to pick up a larger alternator, physically larger that is, maybe from a truck or something like that, that I can get heavier gauge wire in, to produce the higher current that I am likely to need. Yes building it in module form, is a good idea ante. I will post the block diagram soon ;D.
  12. Well ante, I'm pretty hopeless at trying to explain what I mean. I think you're write, make the basic unit and go from their. I'm always looking ahead, for any possible problems I might run into, and I did find one big problem. Having an alternator that I could vary the voltage, and I am using a 12V battery. I didn't think it would be a good idea to be putting 24V into a 12V battery . So the first thing I thought was, how was I going to keep the battery isolated from the higher voltage, as well as keep it charged. Use the second regulator from the LM1458, Q2 will keep the voltage to the battery at 12V maintained by the regulator. Where Q5 is, I had a diode to prevent the higher voltage feeding back to the negative side of the battery. Ok, this seemed to work alright, but there is a problem. To start the engine, I need to supply the PWM with 12V from the battery, and in turn to the reactor, to produce enough hydrogen pressure to start the engine. So now I had to work out a way, to supply 12V to the reactor to start the engine, and then once started, the reactor needed to be supplied its current and voltage from the alternator which is at a higher voltage. Hopefully you are with me so far, and I'm not just piling on the mud :o. The purpose of the extra voltage divider in the PWM, is so I can limit the maximum current, being drawn from the battery, and through the diode, which is labelled with just a (D) Stupid me. This is to be only used at start-up. Q5 and of course, stupid me again Q5. Are used as switches,and the wires going nowhere, will need to go to a device to initiate the switching, that knows the engine is started, and the current and voltage is now being drawn from the alternator. Now having got this far, and adding components to the schematics and taking them away, and making a big mess. I was still focused on what I was trying to achieve. I now have a problem with the diode, that I had in place of Q5 of the regulator, I didn't have a complete circuit, so I replaced it with a transistor. Now I could add it to the 12V regulator, although I am unsure if it can handle controlling two transistors. Or add it to the device that will control the switching, along with the transistors of the PWM. So Q5 of the regulator can be switched on at start-up, and then switched off once the alternator takes over. Now I just realised, that switching Q5 off of the 12V regulator, will result in not having a circuit I think. Will the regulator on the 12V side, be able to work controlling both positive and negative side of the battery. Now the wires that I have added to the regulator (W3) are both meant to be going to, pin 2 and pin 6 of the regulators, pretend that they are not there, I don't know what I was thinking. ante, I hope you like a challenge. The challenge is, understanding what the H**L I'm talking about. Not the actual making a circuit work the way I want. ;D ;D
  13. I added the extra components, to allow me to set the amount of current being drawn from the battery at start-up. And once started it can switch back to the original control. How to make this work properly I'm not sure.
  14. So here is my disaster, under construction that I have so far :o. What I'm trying to do is use a 12V battery, with a varying voltage alternator. I am also trying to work out how I can give power, to the reactor from the battery, to produce enough hydrogen for starting the engine. And once started the alternator takes over. There is a lot here that I need to consider. I basically understand how everything needs to interact for this to work. But I am struggling to apply the electronics, to work the way I want :-\. I need to disable both regulators while hydrogen is being produced for start-up, and the current needs to be limited, as to not draw too much current through the two transistors, I have which I'm trying to use to keep the battery isolated from the alternator higher voltage. I will need something that will detect when the motor is running, maybe an RPM sensor so the regulators can then be enabled. I made some modifications to the PWM. I know most of it isn't right, I'm just trying to apply the idea in principle. Clear as mud isn't it ;D ;D.
  15. Thanks ante, I won't have any trouble getting hold of either of those transistors. Yes ante those articles are just what I need, I think that the old technology, is the best place to start and easier to learn from. After all its usually the old technology, that new is built on ;). I'm trying to modify the regulator the one I posted above, for my application. I will posted it at :o(Schematics Variable current 12v 60A to 0A) and try to explain how I want it to work :o. At the moment I don't know how wrong I have got it, or if there is even anything right with it. But I'm just having ago ;D.
  16. I need a suitable replacement for this transistor, I guess it is a darlington. Thanks for any help.
  17. Sorry ante, I done my best, I owe you that :-\. I will keep searching 8). I think your best bet is hotwaterwizard. He seems to be able to find everything.
  18. Well my request for free sample from Texas Instruments just arrived, I am very surprised :o. I'm pretty sure I can use the (THS4011) it has the same pin out. But I am not to sure about wiring up this one(UC3706N) ??? I have attached the datasheet. uc3706.pdf
  19. Ante, can I parallel chokes. Shouldn't I also be keeping them away from the IC's, because of the magnetic fields they create. What value resistor do you think I should try, to the gates of the MOSFETs, should I use 1watt resistors. When you get the time to look at the schematics ante, is plenty soon enough for me, don't be in a hurry. Your time and knowledge that you have already given me, is very much appreciated :). Thanks ante.
  20. I was working on a full stick harvester, many years ago, and the Boss asked me to wiggle the battery terminal, as he was trying to start the harvester. I didn't realise that it was more than just a bad terminal contact. The whole terminal going into the battery was loose. It exploded in my face, the picture that ante posted, is very much what the battery looked like. It went off with a hell of a bang. We were in the middle of nowhere, and I had to run to the Ute to get the water to watch the acid of my face. I was very lucky, the only damage I suffered was ringing in my ears. There is plenty of reason to be wary of a faulty battery, believe me :o.
  21. Ante, I have a listing in my jaycar Catalogue, for a low ESR capacitor. It tells me that it has, impedance MAX 100KHz, stable low impedance characteristics, high ripple current, will this do the job. Is there a certain type of capacitor I should be using. Am I on the right track in understanding what's going on here. The (ICL 7667) and the MOSFETs have a capacitance, so this needs to be supplied voltage from a capacitor, that can discharge quickly enough, to supply adequate voltage to these components, and can keep up with the fast switching. The capacitance would have to be fairly large for this capacitor, if I was to add more MOSFETs. The resistor to the MOSFETs gates, should be of very low resistance?, will this resistor be dissipating a lot of heat?. I should use A 15V 3A regulator, and a 5V 1A regulator,and keeping in mind their maximum voltage that they can handle, and the dropout voltage of the 15V regulator. The large low ESR capacitor, will need to fully charge through the regulator at start-up will this bother the regulator. Would it help to add a diode between the regulated side of the regulator's to share the load at start-up, or would it not matter. Or is this another one of my silly suggestions, I didn't think through ;D. Can you see any mistakes on my schematics. Or should I say, how many mistakes can you find ;D ;D. I still have two consider the pin out, for the regulator's.
  22. audioguru, yes I will be getting the components from Farnell. The MOSFETs (FDP7030L) is 100A 30V, this is what it is listed as, in Farnell CD catalogue. And on the datasheet I have ???. ante, I'm just trying to get as much flexibility as I can. If I needed to experiment with voltage up to 24V it would be good, to not have to come back and modify the circuit. So a 5V regulator to supply(NE555N) and the(AD8061) so what would be best to use for (ICL7667) a 9V would give me a little headroom, considering my supply voltage is 12V or would it not matter, using a 12V regulator ???. The voltage supplies the path for the current to flow through the water, this makes sense to me, this is why I'm thinking I may need to experiment with higher voltage. Does this sound right to you. The components surrounding IC2 and IC4, are they going to be affected, now that they are being supplied 5V ???. The regulator for(ICL7667) what should its current rating be.
  23. Yes ante, I did notice the mistake on the regulator. I am sure you just done that to test me ;D. I noticed it when I thought of changing it to an adjustable regulator. I also thought of using diodes to drop the voltage, I strung a few of them together to see how much the voltage would drop, then I thought it may be a bit of a rough way to go. It tells me on the datasheet for the(AD8061) that it is not a good idea, to run it at maximum voltage for long periods of time. Maybe the modifications that I made, will work OK what do you think. I also changed the power supply to the (ICL7667) should this work OK, I was thinking that I may need to experiment with higher voltage, so I will also have to consider the voltage ratings of the capacitors. Now I don't know if this will work or even if I need to do it, if I was to add a diode from the 9 V supply, and a diode from the 5 V supply and joined the 9v and the 5v together, this would give me 11.8V, to supply voltage to the(ICL7667) as to not upset things too much. So basically your circuit is still functioning as it had originally did, in respect to power supply. We've just improved it with a better amplifier and supply the amplifier with its ideal voltage :).
  24. Ante, I have a couple of questions about modifying this circuit. Can I simply replace the CA3140M with AD8061, in respect to the correct pin out, or is there more I need to consider. What is L1 for. And D3 16V these are zener diodes?
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