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  1. Martaine2005

    wi-fi

    Never give up.. And sorry to @davenn too, He also recommended the antenna. Sorry Dave, I breezed over that. Didn't mean to.:) Does your card have an ext antenna input? Might be an idea to put a directional one on. Just a thought. Martin
  2. Martaine2005

    Transistor bias configuration

    ERM, Hehe, this is fantastic. But should really remain here. I admire you for sticking by your guns. I will continue to read that thread. Although it is over my head, it really is a good thread to get your teeth into, Martin
  3. Martaine2005

    Activate transistor with piezo disc

    @Drottson The lord hath thou saved you.
  4. Martaine2005

    Activate transistor with piezo disc

    Well it shows the circuit is working. Did you read the link I posted for you? It may be a case of adding a storage device. A capacitor to keep the led on longer. What are you trying to do? Martin
  5. Martaine2005

    Activate transistor with piezo disc

    Hi Drottson, Transistors are quite fast at switching too. Have you tried applying pressure to the piezo disc? Like a quick tap? The Wiki on piezos is quite informative. Here Martin
  6. Martaine2005

    PA mixer / amp repair help

    I think you need to get back to musicparts who sold you the plans. I thought you spoke to them and they were re-sending the proper schematic? Martin
  7. Martaine2005

    Security Sucerity

    Hi CB, Did the 12v power supply come with your cctv? Or are you using a 12v supply (wall wart) that you had laying around. Did it do this from new or has it just started with this issue? The software ispy, is it designed for your camera or a third party add on? Is it happening ONLY when in...
  8. Martaine2005

    Good book for Electronics

    This is a good reference to half wave rectifiers. It explains it really well without all the electronics jargon. And makes it real easy to understand. Have a good read. Martin
  9. Martaine2005

    how to record voice in mp3 format ?

    Hello, Not quite sure what you are trying to achieve. This is a MP3 decoder with full audio interface HERE You could always convert the .wav to mp3 with software converters. Martin
  10. Martaine2005

    Transistor bias configuration

    With a certain vintage in hand to marinate ones grey matter!! Martin
  11. Martaine2005

    push button circuit for quiz

    Hi vikkstar123, This should give you some good ideas. There are a few around the forum. Click on ADAM. Martin
  12. Martaine2005

    Inkjet Printer electronic fault please help!

    Yes it seems to be a very complex printer. I think you need to go back to basics and check the voltages from the power supply. Make sure the regulator is functioning correctly and check all diodes and capacitors in that area. Perhaps somebody on this forum has experience with this kind of...
  13. Martaine2005

    Inkjet Printer electronic fault please help!

    Hi, Have you checked the resistance on IC (E09A19RA) pin 18 to ground? Manual says around 18K ohm is fine but very low 0 or very high Mega to replace it. Martin
  14. Martaine2005

    Transistor bias configuration

    To be honest it was a fascinating thread to read. It was clear that physics had an advantage. But to say "which posts I agree with" would be unfair. I wouldn't want to appear BIASED! :p Martin
  15. Martaine2005

    wi-fi

    Personally no. But as Kiwi already mentioned, it's the wireless router that needs boosting. You could try a different wireless USB card. Orr a different antenna. An 18db 2.4 ghz with a booster seems to yield good results. But to be honest, 300 meters is already a good reception. Martin
  16. Martaine2005

    Transistor bias configuration

    Sorry Ratch, I couldn't resist it. Everything anybody would ever want to know about transistors is here. Martin
  17. Martaine2005

    TV commercial automatic muting device design ideas

    He had a shave:)
  18. Martaine2005

    Good book for Electronics

    What operation? He only had a shave:) Martin
  19. Martaine2005

    Good book for Electronics

    I can give you my understanding of half wave rectification until Steve gives you a proper answer. Half wave only uses one diode and rectifies half the sine wave, so also means that the voltage drops too. It can be the top half of the wave or the bottom half. A full wave rectifier uses two diodes...
  20. Martaine2005

    Good book for Electronics

    That's funny
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