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  1. billy2

    Making PCBs with magazine's paper

    Not really. Just apply the printed paper on the clean copper surface and iron on high for a minute or two with care. Then you can rinse it in warm water. Give it a try ! ;)
  2. billy2

    Oscilloscpoe & logic analyzer

    Help me guys please !!! I really want a simple oscilloscope and logic analyzer, pc based, in order to 'see' in practice what I am reading and cannot understand :) I searched the web a lot but the cost is a bit high to me. The best I found is BitScope (www.bitscope.com), which is a dream for...
  3. billy2

    E12 Resistor Series

    I made this several years ago when I was a real newbie, but it still helps sometimes when the brain stops working :D Hope it helps ! 8) The_E12_Resistor_Series.pdf
  4. billy2

    Led display Digital Voltmeter question

    Did you make it on a breadboard using the schematic or just build the PCB at once ?
  5. billy2

    ATX power supply

    Check this out ! 8) Power_Supply_Repair.pdf
  6. billy2

    Component dimensions chart

    Hello :) Is there any chart that describes the recommended dimensions of basic components for pcb design ? For example I have two resistors, 1/4 w and 1/2 w and a capacitor of 47uF/35V. Is there a way to know their dimensions in advance in order to decide how to place them on the pcb ? I...
  7. billy2

    Free sample chips!

    Texas, national and microchip worked fine, I am waiting for my free samples. Texas offers free courier shipping too ! unbelievable ! Nevertheless, the fairchild company doesn't work because you cannot register in order to get the samples. I wonder if I can make more than one orders to the same...
  8. billy2

    mercury switch

    You can buy the kit 1150 (portabme alarm) from smartkit. There is a very good mercury switch in there ! :) Or get in contact with smartkit and request one :)
  9. billy2

    Free sample chips!

    Yes, you are totally right ! I just ordered my first microprocessor from microchip in order to play around with it :) Any recommendations of other good and popular samples to get from various companies ? I am quite new with thirst to learn new things, please help :) :) :) Thanks 8)
  10. billy2

    Led display Digital Voltmeter question

    I tried to build the L.D.D.V. yesterday, using a breadboard and I came up with peculiar readings on the LEDs. ??? I had followed the schematic from smartkit. I thought that I had a false ICL7107 and I dismounted the components. :-[ Today I thought to check the data sheets of ICL7107 and...
  11. billy2

    Free sample chips!

    I have just ordered some free component samples from MAXIM. This is amazing :) You get them for free ! How is that possible ? Anyway, I would like to ask if there are any other companies that do the same as well. And finally, has any greek fellow ordered from MAXIM with regular (free) shipping...
  12. billy2

    0-30 Vdc Stabilized Power Supply

    In order to connect a Voltmeter and Ammeter to the Power Supply, I need a +5V power source. I am thinking of building a secondary power supply that takes a 24V DC current from the main 220/24 V 3A transformer + Rectifier, in other words connect another power supply to the output of the diode...
  13. billy2

    Led display Digital Voltmeter question

    I would really appreciate if someone could tell me a way to change the default 0-2,0-20,0-200,0-2000 scales to a custom one, for example 0-30 V (or 0-40, it doesn't matter) because I want to integrate this circuit to the Stabilized 0-30V 0-3 A Power Supply that appears on the entry page of...
  14. billy2

    PCB Drill Hole Sizes

    Hi all, I am very new to making my own pcb and I would really appreciate if anyone could give me some very basic guidelines of what hole sizes it is proper to drill for the basic electronic components. I have bought a set of 0.4, 0.6, 0.8, 1.0 and some even bigger drills. Thanks a very lot. :)
  15. billy2

    Making PCBs with magazine's paper

    I first have to apologize to MP because I said I laughed at the photographic method. It was just a joke maybe because I was over-excited about the results of the toner method. :) Of course not hard feelings at all, I really respect the professionals who do projects with high resolution pcbs, I...
  16. billy2

    Making PCBs with magazine's paper

    I tried the procedure yesterday and the results are awesome !!! :o I made a very professional looking pcb with a very low cost. 1) Print the pcb layout on photo glossy paper using a laser printed and high resolution. 2) Clean the copper surface. 3) Put the glossy paper facing the copper and...
  17. billy2

    Excellent repair library

    I suggest the following URL : http://www.repairfaq.org/sam/sammenu.htm to be included in the Links section under the "Repair" page (which is currently empty). It is a thorough and very well written knowledge base for home appliances repair ! ;) Vassilis
  18. billy2

    Printer cable LCD Display

    After many days of searching, this is it : http://www.liquidmods.de/lcd/display_detail.php?prod_id=9&prod_type=1 This is the best around, everything else is junk ! :D 52,50 euro + 17 euro postage to Greece. Check the greek forum for our plan for a mass buy, in order to split up the...
  19. billy2

    Site Enhancements

    Two simple suggestions dear administrator : 1) Include a tab of 'All Projects' under the projects section if someone wants to see everything at a glance. 2) A larger list of the recent topics, not only the eight latest. There is no other way to see if you have missed something. Or, leave the...
  20. billy2

    Printer cable LCD Display

    Hey, try these : www.liquidmods.de www.modwarehouse.de It is a good idea to go for a larger LCD, let's say a 20x4 or even a 40x4 if you have space. You can go for blue too, if you tired up from the ordinary green ones. The connections for larger LCDs are pretty the same. A good idea is to add...
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