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  1. kellys_eye

    Cicuit board design

    You have (almost) all the information in that very statement..... 1. Solar cell - find one that you think suits (is size important? - giggidy) 2. 18650 - in series or in parallel? 3. booster - otherwise known as a 'buck' (step-down if using 2 x 18650 in series) or 'boost' (step-up if using 2...
  2. kellys_eye

    Hi, have anyebody had trouble building the ELENCO 108 AM/FM RADIO KIT

    Show a (clear) picture of the assembled board.
  3. kellys_eye

    Adapting power output

    It'll charge all 3.7V lithiums but only at a certain charge-rate - in your case 500mA. Larger capacity batteries will (obviously) take longer to charge using that charger.
  4. kellys_eye

    Simple LCD - help needed plz

    What makes you think this is the case? Are you 'embarrassed' by the make/model? I'm perplexed as to why you are reluctant to divulge! If the LCD has specific segments and/or indicators then you certainly won't find a generic alternative.
  5. kellys_eye

    Hi, have anyebody had trouble building the ELENCO 108 AM/FM RADIO KIT

    The LM386 isn't a static sensitive device and you'd have to really butcher your soldering to overheat it. Assuming you soldered it in the correct orientation it is probably ok.
  6. kellys_eye

    Over heated technics sa-g90

    :rolleyes: Some components, and the way they are designed/operated, simply dissipate heat..... providing that heat is within the design parameters of the equipment - which you STILL haven't revealed - then it's not a problem. It's 'inefficient'..... but that's about it. You 'may' have an...
  7. kellys_eye

    Adapting power output

    The diode forward voltage drop multiplied by the current draw will reveal the power dissipated. So approximately 0.6 x ((4 x 0.15)+.1) = 0.42 (under 1/2 watt power loss). This will be the same as using a resistor (near enough) but the alternative would be to fit a buck converter (electronic...
  8. kellys_eye

    Hi, have anyebody had trouble building the ELENCO 108 AM/FM RADIO KIT

    Schematic? Usually, with these self-build kits, it's nearly always a mistake with assembly. Double-check everything.
  9. kellys_eye

    Over heated technics sa-g90

    same question though........ so far unanswered!
  10. kellys_eye

    Adapting power output

    The fans and pump will probably work ok at the slightly higher voltage of 3.7V over their rated 3V but if you want to be safe and sure then fit a diode (1N5407) in series with the battery output. It will drop somewhere between 0.6 and 0.7V across it, leaving 3V (near enough) to the fans etc.
  11. kellys_eye

    Prosound 1600 amplifier repair

    Find the workshop manual for it. Post a link to it and/or the schematic for the amplifier.
  12. kellys_eye

    D-PROTECTION for my LG om7550d

    Without my usual crystal ball.... 1. what is an LG om7550d? 2. what is D-PROTECTION? When requesting information it is polite (and good practise) to at least post a link to the equipment, a (potential) user manual/schematic and as much detail as may be required to FULLY EXPLAIN the problems...
  13. kellys_eye

    Prosound 1600 amplifier repair

    What would you LIKE to be done?
  14. kellys_eye

    Simple LCD - help needed plz

    :confused: Without a full explanation of the mutiplexing techniques used for the various types of LCD that exist - and your understanding of them - further information would be potentially fruitless in your search for an answer. You might be, but the actualities are rather different..... You...
  15. kellys_eye

    Simple LCD - help needed plz

    You can get custom-made LCD's but they aren't cheap, certainly not as one-off items. If the unit is that important to you then seek a replacement via the usual auction sites otherwise be prepared to junk it.
  16. kellys_eye

    Cicuit board design

    Just a point of note - what you are requesting (i.e. for 'us' to do the design work) would usually cost upwards of £75-£150/hour from professional services. This is not something that the forum is meant for although there may be some willing members prepared to do this for you - they may even...
  17. kellys_eye

    Over heated technics sa-g90

    What makes you think this is a problem? Is it working properly otherwise?
  18. kellys_eye

    Vacation

    'Protection' Phone number of a decent lawyer......
  19. kellys_eye

    Starter Equipment

    Hmmmm, the 108MHz figure raises an eyebrow. That's the top end of the commercial FM band. You're not thinking of messing around in those areas are you?
  20. kellys_eye

    Starter Equipment

    There are many second-user speccy analysers on the market but they are inevitably coveted pieces of equipment and can still command high prices - nothing like the $10,000 you quote though! When you talk of 'ham' radio it can encompass anything from LF to SHF and will be reflected in the price...
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