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  1. mixos1

    8 way relay board

    You are welcome Vedran, don't be shame :) At the + - 12v points appears such a voltage if your power supply work ok. You don't need to connect anything if you plug at the Power Socket the output of a power transformer of 12V. Otherwise if you don't connect a tranformer and you have a power...
  2. mixos1

    8 way relay board

    There must be a typographical error about 1N4004. It's place is where 1N4001 is on pcb. In other words on pcb 1N4001 -> 1N4004. The 0.01uF capacitor is near 7812, the green one. It's a tantalium or ceramic one. Nothing special. The 1A Bridge Rectifier is nothing special either. It's just a...
  3. mixos1

    [ARTICLE] Build your own UV exposure box

    The transistors are general purpose PNP transistors. You can use: BC556 or BC557 --> Download Datasheet
  4. mixos1

    Oscilloscope project

    Hello :D You can find some Soundcard oscilloscopes software that require no hardware to be attached to the pc. You need only one sound card and some connectors to drive the signal at the input of the sound card of your pc. Check here: http://www.electronics-lab.com/downloads/pc/index.html...
  5. mixos1

    Inside a Cathod Ray Tube (CRT)

    Ever wondered what's inside your monitor? Here are some pictures from a broken monitor CRT that helps you clear out the mystery. Remember: Don't try it yourself because may be dangerous. The tube broken... and we are ready to see inside. Ops... I thought it was empty :o ! I was wrong...
  6. mixos1

    Diodes Diodes and more diodes!

    Hello Junkman Thanks for your interesting description.. it's really interesting (and dangerous :o) to "play" with power electronics! Have you got any photo of your charger? It will be very interesting also. What type of batteries you charge with it? I propose to make a portable electric...
  7. mixos1

    time delay/ hold circuit

    As manotronic noticed you can use a 555 timer in Monostable mode: The basic circuit is this: For circuit description and how to attach a relay visit: http://www.technologystudent.com/elec1/5554.htm
  8. mixos1

    Transistor tester

    mozikluv you and your questions are always welcome :) ! 1. Attach the plier to the ground for some seconds to discharge it. Handle it from an insulated grasp. Then align the pins without fear. If you want to feel more secure attach the plier to the ground via a cable, but i think it's not...
  9. mixos1

    capacitance meter

    Hello OA47 is a Germanium Gold Bonded Diode. It's an old fashion diode and it isn't used in our days. You can try a 1N34, 1N34A, 1N64, 1N64A, 1N914 instead. About your first question i am not able to answer you.
  10. mixos1

    Transistor tester

    The best way to hanlde electrostaticly sensitive devices is to supply your work bench with an antistatic mat which is connected to the ground. Also you must discharge yourself. For that reason use a conductive wrist connected to ground. There are special Antistatic Work Surface Kits and...
  11. mixos1

    transistors

    Hello EDY! You are right, the english writing of a japanise people reflects the japanese complexity !! hFE is a number which accompany each BJT transistor (may differ from transistor to transistor). It's a number that tells you how many times the base current will be multiplied and finally...
  12. mixos1

    frequency to voltage conversion question

    I found this Frequency Multiplier: http://users.otenet.gr/~athsam/frequency_multiplier.htm I think it's exellent for your case. With it you can multiply a frequency of 1Hz (or below) a hundrent times. Which is the minimun frequency that LM2917/LM2907 can be driven?
  13. mixos1

    CD4093 and TA8184 datasheet

    Download Datasheet for CD4093 Download Datasheet for TA8184
  14. mixos1

    Action

    Yes you can post almost everything. I will add it if it is helpfull. You can send it via e-mail also, until the Action Section is online.
  15. mixos1

    Action

    Hello I am planning to add the abbility to let users upload (and then publish) their circuits. The credits will be all theirs. Have you got another idea? Drop it here..
  16. mixos1

    BZX85C180

    Hello EDY I attach you the datasheet of bzx85c diodes series. It's only 58,8kB Tip: when you search for a part's datasheet like the above bzx85c180, try to guess if there is a main name and a prefix of subfix, like happened in this situation. The bzx85c is the diode number and the 180 is the...
  17. mixos1

    Transistor tester

    If you look at the pinout of each circuit you will notice that they are the same. Also the internal circuit it's the same.
  18. mixos1

    Transistor tester

    1. Right! CD4027 is a CMOS Dual J-K Master-Slave Flip-Flop with Set-Reset capability 2. Datasheet download: cd4027b.pdf (408 kb) 3. Pin 1 & 2 are not used. 4. Yes
  19. mixos1

    How to read .ps (postscript) files

    The best program you can use is GSview The home page is: http://www.cs.wisc.edu/~ghost/ The download page is: http://www.cs.wisc.edu/~ghost/gsview/get44.htm Or download directly form here: gsv44w32.exe Win32 self extracting archive gsv44os2.zip OS/2 archive gsview-4.4-1.i386.rpm Linux RPM...
  20. mixos1

    printed wire/circuits

    The good think is that there is a special Silver Conductive Pen and with it you can make conductive traces to design a circuit. Mainly it is used to repair pcb faults. The bad thing is that you must route the circuit by hand and maybe you must use a transparency paper or another paper of same...
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