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  1. Sadlercomfort

    Identifying 3 unkown components

    Hi guys, as a learning experience I'd like to identify these components. I have 3 types of components here which I can't identify on the internet. The black components have no markings on them but the other two blue components are both Phillips. One seems to be measured in the unit μM and...
  2. Sadlercomfort

    Help with transformer. Large surge currents

    The transformer is an ex-transformer. I connected the 100W bulb in series with the transformer after the fuse and it lit up brightly, it showed no sign of dimming after a few seconds. I'm going to have to find another transformer, maybe I should repeat this test on the other two recycled...
  3. Sadlercomfort

    Help with transformer. Large surge currents

    Okay, that is a clever idea . I'll grab a spare bulb and try that in just a moment. Thanks Steve, I'll post my results when I'm done.
  4. Sadlercomfort

    Help with transformer. Large surge currents

    Thanks for your concern, I'm very careful and always keep a fuse on the fixed breadboard that I don't need to hold while turning on the supply. I would never get cocky with electrics, I know there's always dangers. It's definitely a 240V transformer, but one I recycled off an old circuit...
  5. Sadlercomfort

    Help with transformer. Large surge currents

    Hi guys I'm experimenting with power supplies and am trying to rectify 240VAC to a variety of voltages. The transformer has several output pins and two input pins. I have tried connecting the transformer on the primary side to AC, while testing the outputs. I seem to be getting large surge...
  6. Sadlercomfort

    Laptop DC Adapter - Burnt Out

    Thanks Dave, I understand the circuit much better now, does anyone have any similar schematics on this type of circuit. I've given up repairing this for now, but from a students perspective I'd like to learn more about this circuit. Wait think I found a schematic with a input/output power...
  7. Sadlercomfort

    Laptop DC Adapter - Burnt Out

    Haha, it's a foam-like insulator which looks a real mess. So the transformer steps-up the voltage to 340V at high frequency in order to rectify the mains voltage efficiently. I will have to read about SMPS, there more complicated than linear regulated supplies. What are the chances of fixing...
  8. Sadlercomfort

    hp lap not displaying

    Hi Are you sure its not displaying anything at all? Tip up your screen and look at it from an angle while it turns on, see if you can see a very dark picture or even just outlines. This could indicate a broken back-light bulb, or worse it could mean your ccfl inverter is broken and not...
  9. Sadlercomfort

    Laptop DC Adapter - Burnt Out

    Hi Duke, Thanks for your reply I think I might just strip the parts of this then, I do have another adapter but an SMD IC went on that one and it has a different output (15V 8A) so I might have to buy a new one. As a student can I just ask what type of transformer is this, what's it's...
  10. Sadlercomfort

    Laptop DC Adapter - Burnt Out

    Hi everyone, my DC adapter for my laptop made a popping sound yesterday and filled the room with a burn smell very similar to those party poppers. On the underside of the board all solder joints/SMD components seem fine and I can't find any apparent damage to the top. All the top components are...
  11. Sadlercomfort

    Keyboard repair after spill

    WD40 a multi-purpose spray that is a great at cleaning up corrosion on metal contacts, I've used this before when cleaning keyboards, and other corroded contacts
  12. Sadlercomfort

    PIC Programming Xino

    Nevermind, thanks to the Universities engineering library I found a book based on PIC programming and hardware. It was very helpful :)
  13. Sadlercomfort

    PIC Programming Xino

    http://openmicros.org/index.php/articles/88-ciseco-product-documentation/139-xino-basic-for-pic-and-picaxe
  14. Sadlercomfort

    PIC Programming Xino

    Hey guys I have a K010 Xino basic board, does anyone know if I will need a line driver (Voltage driver) to work with this board? Or does it have it built in? There website () states that Xino Pro contains onboard voltage regulation, but I'm not sure if this applies to the Xino Basic. I'm...
  15. Sadlercomfort

    DC adapter supply question

    Turns out it was a beginners mistake =] I tested my positive/negative pins directly from my adapter and got around 13v. Then I plugged my adapter into my dc jack plug, which is connected to my voltage regulator and test between +/- at the input from voltage regular and got 0V? So I tested my...
  16. Sadlercomfort

    DC adapter supply question

    Yeah It's really puzzling me too. I keep questioning whether im making a mistake because im still a beginner with electronics. I've also tried connecting a few different dc adapters into a voltage regulator module, which has a variety of input and output voltages. . but still getting nothing, as...
  17. Sadlercomfort

    DC adapter supply question

    Why can't I use a dc adapter to supply a variety of electronic circuits, instead of a battery? When using batteries my circuits will work fine, but using a dc supply from an ac - dc adapter gives me no power at all. The 12v adapter works fine and is tested. So there obviously something I'm not...
  18. Sadlercomfort

    Circuit requires two voltages for supply

    Okay, it doesn't say you cant connect them together in the datasheet either.. Just thought I'd check, these chips are expensive. Thanks, Ash
  19. Sadlercomfort

    Circuit requires two voltages for supply

    Here's the schematic, the chip just needs one voltage (preferably a low voltage). The external circuit requires a higher voltage.
  20. Sadlercomfort

    Circuit requires two voltages for supply

    Hello, I'm trying to understand how to build a Royer Oscillator circuit using the LT1172 IC. However this circuit design requires two different voltages, around 6v to supply the IC and around 12v to supply the external part of the circuit. How could I tap off the main 12v supply, to...
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