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  1. Martaine2005

    lasers power supply problem

    Hey cjdelphi......Shall I pm my paypal to you?:p About those lasers...We also have strict laws on 1mw max lasers. And the law takes it very seriously! Some Ebay lazers, labelled as 1mw have been checked and found to be 10 to 100 times more powerful!. Kids/teenagers have been arrested for...
  2. Martaine2005

    LED power supply help

    Ah OK, I don't recall 300, perhaps I omitted to ask! Or was too drunk to notice:eek: The VR, (I think) needs all three connections, or it will just stay at the same resistance. Let me check that on the breadboard. Let me check the datasheet on the 2N2222. We may need to change them. Also, it...
  3. Martaine2005

    LED power supply help

    Negative on the rectifier? Reversing the polarity could indeed have blown the ic's. Can I ask a couple of questions? I just looked at the diagram and can't remember whether we spoke about it, without reading back.... 1. How many LEDs on each circuit? 2. How did you connect the VR? I see I...
  4. Martaine2005

    LED power supply help

    Hi Ian, Sorry to hear that. What wire was soldered wrong and to what? Hoepfully it didn't blow one of the chips. I can try and replicate it and see if it does blow a chip! Martin
  5. Martaine2005

    Adapter Specs

    Surprisingly, I have two of these external HDDs bought at the same time and same shop. I would never have taken any notice until now! These adapters are identical... Except one is 2A and the other is 3A...Go figure! I would try the 1A (1000mA). If it gets warm within minutes, don't use it and...
  6. Martaine2005

    My video on NOR gates: transistor design, and CMOS gate array implementation

    You are obviously very talented. Some might shy away from technical 'stuff'.. But this is truly a technical forum.. And yes, what a book that could be! But what side of the fence are you?....There you go, a name!! That will cause some fun here!! Martin
  7. Martaine2005

    My video on NOR gates: transistor design, and CMOS gate array implementation

    Hey Lavaguava, I have all the old Gameboys. In fact, two of each. And hundreds of games!. My children are 18 and 15 and will never touch one again. I will keep them all boxed just in case. Like the PS, PS 2" screen, PS1, 2, 2 slim, 3 and now 4. Will it ever end? Never did get xbox.. I will trade...
  8. Martaine2005

    My video on NOR gates: transistor design, and CMOS gate array implementation

    I am not sure what that was all about! But it sounded impressive! I have a gameboy that still works.:)
  9. Martaine2005

    Help: Datasheet Acronyms

    Glad you liked it!:) Click the blue links to get more.. Martin
  10. Martaine2005

    My video on NOR gates: transistor design, and CMOS gate array implementation

    No need to read up on them. All is given here factually and physics behind them too. OK, I lied a little about reading!! But hey, research is a good video? Martin
  11. Martaine2005

    Power consumption of vibratory pump when pumping against closed valve

    OK I am strange! Still funny though!!
  12. Martaine2005

    Help: Datasheet Acronyms

    Have a peek at this..here. It all started with transistors... Vss = voltage , source, source. vdd = voltage, drain, drain... vcc too.. = collector, collector Don't forget vbe too.. But I am not allowed to mention vbe!!!! Seriously, when at home, Google each and read..I just did, So thank...
  13. Martaine2005

    My video on NOR gates: transistor design, and CMOS gate array implementation

    I actually liked the video..I was expecting a sales ending...with a web site to visit.. But very well done! Now, can you do a video on transistor junctions? That would be a hit on this forum... Martin
  14. Martaine2005

    My video on NOR gates: transistor design, and CMOS gate array implementation

    Hi Mark, Nice video..You sound like a robot though!!
  15. Martaine2005

    lasers power supply problem

    Personally, I don't think a diode would mind an extra 0.3v. But that's just my opinion. I have never played with lasers so I can't even wire one up and tell you at what voltage it explodes!! If you have the same setup, different location and different results, it must be something to do with...
  16. Martaine2005

    Power consumption of vibratory pump when pumping against closed valve

    Am I the only person here with a strange sense of humour? Well, I thought it was funny....
  17. Martaine2005

    1N4937 diode

    No problem..
  18. Martaine2005

    1N4937 diode

    Have a read of the datasheets for both. You will find these in typical bridge rectifiers. So easy to scavenge one. http://www.diodes.com/_files/datasheets/ds28002.pdf Martin
  19. Martaine2005

    lasers power supply problem

    Not higher amperage, rather constant current. Lasers are current driven like Leds. What have you done differently from when it worked and now? Power supply? Martin
  20. Martaine2005

    1N4937 diode

    That would be a very suitable match.. Martin
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