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  1. Martaine2005

    Woo-Woo LED Magnetic Lighting: Is it for real?

    These videos are not fakes. They are real videos. I live in a block of flats, everyone else pays for electricity. Mine is free. I have my magnet with 145 turns of 0.02mm copper wire winding and get 240v. I have this inside my microwave to heat the core and generate 32 amps. Of course, I need to...
  2. Martaine2005

    Question about repairing a Samsung Syncmaster p2450h monitor

    As it works 50% of the time, I would be inclined to keep cleaning and scraping. Then with your soldering iron, re-touch all solder joints. I would guess that the conneter near C1 is the culprit. Dry and corroded solder joints. Martin
  3. Martaine2005

    how to determine the right voltage for led lamp?

    @Alec_t beat me to it. Have you WWW. Searched for your lamp?. Google images is great. Martin
  4. Martaine2005

    how to determine the right voltage for led lamp?

    Hi, first of all, how many groups of four leds are in Parallel ?. What kind of LEDs are they?. LEDs are current driven devices. They have a ‘turn on’ voltage but that depends on what kind of LED they are. For example, if four 2 volt leds are in series, that would be 8 volts. They might require...
  5. Martaine2005

    New to forum please help

    @BobK made me check the link too!. It took me 5 minutes to realize and then I cracked up!. What a brilliant unfortunate photo for both. Starting with him at the back, in big trouble with his wife. Her in the middle, in big trouble with her husband. And her in front, well, just big!
  6. Martaine2005

    Micro hydro-electric generator help

    https://www.pbo.co.uk/practical-projects/charging-a-battery-from-an-outboard-motor-19215 The link provided seems quite informative. Might be worth a read. Martin
  7. Martaine2005

    My local hackerspace's electronics lab is taking form

    That’s not a mess!. It’s a dream come true for any budding enthusiast. My bench is my coffee table in the living room!. But I am in the UK, so have a good excuse. Martin
  8. Martaine2005

    Biefeld-Brown effect (high voltage 'flying' discs?

    I recall seeing something similar a decade or so ago. In a lab ‘scientists’ had a metal disc with a vertical multi strand twisted wire through it. The disc shot up real fast. I think they called it magnetic propulsion. If I am correct, the ‘scientists’ were ‘proving’ that we nearly have the...
  9. Martaine2005

    Full-Wave Single-phase Controlled Rectifer

    This looks like homework.. Look on Youtube for “greatScott”. He has a great video on diodes and bridge rectifiers with all the revelent math and formula including RMS. Martin
  10. Martaine2005

    PCB MKL90W-02-C1 / 0500-0515-2180

    Responses!!...
  11. Martaine2005

    PCB MKL90W-02-C1 / 0500-0515-2180

    Hi MichaelJ, The reset procedure is more than likely done on the equipment rather than remotely. C21 is also more than likely a ‘no pwer up’ situation from the power supply. But great responces in most of the posts. Martin
  12. Martaine2005

    Graetz bridge location

    Circuit number 1 is the correct way. The full bridge rectifier converts AC to DC. Martin
  13. Martaine2005

    Question storage dvd media and ziplock and silica gel

    @gamer87 . All your messages are about ‘storing’ crt’s., dvd’s, plastics, tube sockets, etc etc. There is no definitive answer. Materials used in thr 80s have problems especially with plastic. Components have problems especially with electrolyte drying or leaking. Or thermal compounds drying...
  14. Martaine2005

    Seeking Identification of Material

    Sorry, I can’t really be specific. But it’s either waterproof, uv, silicone, poly etc. If it’s underground, any potting should suffice. Ie, no UV etc. 3M is just a manufacturer and a very good one too. If that is what they used, it’s . good for that company. They doon’t want to keep digging and...
  15. Martaine2005

    Seeking Identification of Material

    Glad I helped. All the best Martin
  16. Martaine2005

    Questions socket crt tv

    1.yes 2.yes 3.Maybe You can cut, change, extend, shorten, lengthen, adjust most things. Whether it works as you require is another matter!. To answer your question, it depends on the pitch of the connections on both the socket and tube. Sometimes we (and I speak for all of us) have to try and...
  17. Martaine2005

    Seeking Identification of Material

    Hi Chris, that would be a clear potting resin/compound. It seals the board against harsh conditions. If you www search for “potting and encapsultion”, all your question will be answered. Martin
  18. Martaine2005

    plastics electronics crack

    I agree with ALL of the replies. Except nobody has mentioned whether or not these mounts are 1980s brittle plastic. It just keeps breaking!. As suggested already, I would sleeve the mount but with thin brass hollow rod epoxied in place. Also epoxy the screw hole and insert the screw. After two...
  19. Martaine2005

    Does the TDA2030 need negative potential?

    https://www.st.com/resource/en/datasheet/cd00000128.pdf
  20. Martaine2005

    Denon DRA-545RD

    Also, is the 'three minute' wait for 'turn on' from cold?. Or is this after using the amp for a while?. Possibly a thermal issue and the protection circuitry is resetting after a couple of minutes of cooling. Martin
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