Search results

  1. Dazza

    sound recorder

    (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...
  2. Dazza

    sound recorder

    martintheis, here is a start. I think this device will record for 20 seconds.
  3. Dazza

    Schematics Variable current 12v 60A to 0A

    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...
  4. Dazza

    Schematics Variable current 12v 60A to 0A

    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...
  5. Dazza

    Schematics Variable current 12v 60A to 0A

    Ante, can you make sense, of this block diagram.
  6. Dazza

    Schematics Variable current 12v 60A to 0A

    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...
  7. Dazza

    Schematics Variable current 12v 60A to 0A

    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...
  8. Dazza

    Schematics Variable current 12v 60A to 0A

    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.
  9. Dazza

    Schematics Variable current 12v 60A to 0A

    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...
  10. Dazza

    Need datasheet SK10122 or alternative component.

    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...
  11. Dazza

    Need datasheet SK10122 or alternative component.

    I need a suitable replacement for this transistor, I guess it is a darlington. Thanks for any help.
  12. Dazza

    MosFet

    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.
  13. Dazza

    Schematics Variable current 12v 60A to 0A

    The, THS4011 ths4011.pdf
  14. Dazza

    Schematics Variable current 12v 60A to 0A

    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
  15. Dazza

    Schematics Variable current 12v 60A to 0A

    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...
  16. Dazza

    Problem with LEAD-ACID Battery

    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...
  17. Dazza

    Schematics Variable current 12v 60A to 0A

    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...
  18. Dazza

    Schematics Variable current 12v 60A to 0A

    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...
  19. Dazza

    Schematics Variable current 12v 60A to 0A

    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...
  20. Dazza

    Schematics Variable current 12v 60A to 0A

    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?
View older results
Top