Search results

  1. autir

    Need e-shop located in EU

    Hi all I have been searching for electronics' e-shops situated in the European Union for some time - but haven't found anything. By the term "EU" I am referring to the no-toll-tax zone of countries (I am uncertain whether GB is part of the show). Does anyone have something to suggest? Thanks a...
  2. autir

    Op.Amp. vs. Diff.Amp.

    What are the differences between an operational and a differential amplifier?
  3. autir

    Choice of small signal BJTs

    Hello ppl
  4. autir

    Choice of switching regulator IC

    Hello all  :) I have decided that the new project I want to build ( a 1.2-30V, 3Amp variable PSU) should have a switching regulator IC instead of a linear one. After a search I have decided that National's LM2576T-ADJ is an IC well-suited for my needs. Does anyone have to propose a different...
  5. autir

    FM Receiver Circuit

    http://www.commlinx.com.au/schematics.htm Look at the "RF" section. Especially this looks promising.
  6. autir

    LM317 Variable power supply

    Darn...  :( So, since I cannot create PCBs by myself, the only way to build such a circuit is hard-wire? The PSU I have built (remember that 500mA project?) is soldered on a stripboard and I have not whitnessed any problems...  :(
  7. autir

    LM317 Variable power supply

    What exactly is this "star" topology?
  8. autir

    i have a question

    Hi I use a stereo jack to rca cable and then I connect the signal to the rca's signal (pin) and ground to the rca's ground (the round metal rim). It is the simplest, cheapest and most crude way to use an audio card oscilloscope. The fidelity of the signal will be mediocre due to losses...
  9. autir

    My new project

    Nice piece!  :o That pretty much simplifies things... All you need then (in the car side of the project) will be the RF transmitter/receiver which will handle digital pulses. Or so I believe? p.s.: You will still have to install a microcontroller in your house in order to convert data from...
  10. autir

    My new project

    The link is dead  ::)
  11. autir

    My new project

  12. autir

    My new project

    It's a programming tool too, Staigen. Borland C++ Builder makes sure that you don't have to write code in order to create a button, window or similar graphical widget. You draw them on-the-fly using the appropriate tools. Like Visual Basic, if you have heard of. Big deal. Why; Because the...
  13. autir

    My new project

    Well, it doesn't sound easy. The touchscreen/interface part will be tricky. Forget about C++. Most microcontrollers are programmed in assembly, lately there have appeared a small number of C and BASIC compilers. Why do you want C++ anyway? You cannot fit many objects inside a microcontroller...
  14. autir

    Opinion on a brand of solder wire

    The solder wire is perfect  8) It produces a very small amount of fumes, which do not smell at all. It does not "spit" burning hot drops all over my arms, and the solders are the shiniest I have ever done. A pleasant change from my old cheap solder wire. I have assembled my second circuit using...
  15. autir

    positive and negative voltages

    Darn... you are right...  :-\ But I am sure I have seen a similar circuit in the LM7800 series datasheet. Producing negative voltage from an LM78xx.
  16. autir

    Stripboard + Acetone

    Will ordinary alcohol do? The one they sell in drug stores for medical reasons. Care to explain this a little bit more?
  17. autir

    Stripboard + Acetone

    After reading some articles here regarding cleaning stripboards and PCBs after the soldering process, I went to a nearby paints store and asked for isopropyl alcohol or acetone. They only had acetone, of which the smallest container was a 1-liter metal vial. I bought one for 2.60 Euros. When I...
  18. autir

    positive and negative voltages

    Why not just use an LM7912?
  19. autir

    Opinion on a brand of solder wire

    Jarmund hi (familiar name... hmmm....)  ::) The typical solder we use today is an alloy of approximately 60% tin and 40% lead (Pb). This alloy has a low melting point (about 250 C ? ), so we are able to solder with ease and speed. Its only drawback is that lead is an extremely poisonous...
  20. autir

    Opinion on a brand of solder wire

    Audioguru hi  :) The 0.5 kg package costs 10 Euros. I do not know if it is expensive or not, it is the first time I buy solder wire in a large quantity. It does not seem to be much money because it will last me months. The time needed to correct wrong solders (my soldering skills are still low)...
Top