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  1. Herman the German

    Laying out a strip board

  2. Herman the German

    Angle Sensor

    Analog devices offers a new two-axis accelerometer chip. It can sense angles up to 0,1degrees accuracy in both X and Y direction. The name of the circuit is ADIS16201. There will just be a small problem using it. It does not have pins, but a so called "Land Grid Array" LGA-package meaning the...
  3. Herman the German

    Laying out a strip board

    You might also use Eagle light. Look up CadSoft.de and download version 4.12. There are no restrictions on parts or functions. The only restriction is the maximum board size of 160X100mm. However it is free and includes a fairly good autorouter as well. Regards HtG
  4. Herman the German

    Are datasheets important?

    Hi audioguru, I just saw it that way. Why not take a CD4060? That one can use an Rt > 1K and Rs about 10XRt. Of course, it has an odd outputs (compared with the CD4047),  but can be compensated by setting the correct clock frequency. Inverter frequencies should be near the nominal main...
  5. Herman the German

    Are datasheets important?

    Hi MP, I suppose that you know what you are talking about after having been engineer for more than 30 years. I read every argument in this topic and I think that some of your words chosen are very close to disrespect. It is not important to be an engineer. It is important what you do and how...
  6. Herman the German

    New logic gate developed - norep

    ::) Yeah, the site has been blocked by the ministry of information!
  7. Herman the German

    Eagle Manual

    ;D Yes, son, I translated the manual from German to English with a lot of screenshots for better understanding. If you want it just reply by e-mail. Uploading here doesn't work because of the limited file size. (Approximately 25MB) HtG
  8. Herman the German

    Construct Large LED Sign

    ??? Did I get that right? The symbols are supposed to be one foot high? If so, I'll think about a schematic. Second question: Just numeric display or alphanumeric?
  9. Herman the German

    help "EtCHING technique"

    :o The most simple way is just dumping your PCB into irontrichloride in a flat bowl. Etching accelerates with a little mechanic help. This can be done by causing the liquid to make small waves on the surface. Advantage: You can see the progress and take out the PCB early enough to prevent...
  10. Herman the German

    electrchemical sensor

    ??? If you want to keep the sensor type secret you won't get any satisfactory results out of your question.
  11. Herman the German

    what is this chip?

    Leave that chip alone. It is produced for industial purposes and not for sale in shops.
  12. Herman the German

    German diode translation?

    :) Just send me the stuff. I am German and give you the informations you want. Send to [email protected] HtG
  13. Herman the German

    New logic gate developed - norep

    ;DHey freaks, here is something you have been looking for to make your circuit unpredictable. A new gate JUX1-3 has been developed to overcome this problem. It is a perhaps-gate with a variety of functions. The IC is produced in a DIP-14 package and contains four identical gates. Technical...
  14. Herman the German

    Tell me how to protect my computer

    ;D Try everything else but don't try Norton or McAfee. Both of them mingle in your system while you don't expect it and they also decelerate it considerably. Herman the German
  15. Herman the German

    Cont to 'n' and recycle

    ??? The decimal counter CD4017 can be wired not to count all the way up. However counting from zero to six and resetting with the output 7 it starts at one (zero almost omitted). Who knows the trick?
  16. Herman the German

    The caps surrounding the LM7812 regulator?

    Omit them if you like it hot! Like any oscillation (mechanic or electronic) it produces heat! Of course the poor regulator will some time die because of the tremendous heat inside. You can accelerate this process also omitting a heat sink. Concerning the input voltage for a stable output three...
  17. Herman the German

    8 way relay board

    1 inch equals exactly 24.5mm. Figure the numbers in mm accordingly, lazy guy!
  18. Herman the German

    Marketing assistance

    Hello everybody, I am in close contact wiht a Korean producer of UV-LEDs. Since those people know how to produce the LEDs they don't know much about marketing. I sent them already a list of more than 1.000 German electronic suppliers and I am curious to know if there exists something similar...
  19. Herman the German

    Voltage-to-pulse-duration converter

    Hello everybody, I read an article in Philips application note (AN170, Dec. 1988) about an application to convert voltage to pulse duration - PWM. I tried the circuit with a simulator programme with the only difference using 2N2222 instead of a 2N3642. No matter which input voltage is applied...
  20. Herman the German

    Nixie tubes

    Thanks a lot! I'll find a place to buy them.
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