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  1. Herman the German

    Nixie tubes

    ??? Nixie tubes were a long time used before LED displays. Who knows a loacation where nixie tubes are still available? Kind regard to all Herman the German
  2. Herman the German

    AWG (American Wire Gauge)

    Mils don't help not knowing how many! Setting mils instead of inches just changes the value. I have got that far, 100 mils equal 1inch. Good to know somebody likes my desktop. My wife doesn't!
  3. Herman the German

    Suppliers for Laser TX and RX diodes

    :D Thank you very much. I will try.
  4. Herman the German

    What the meaning of .....

    hybrid is also used to grow animals and plants. If you buy a hybrid chicken this chicken will not be able to produce chicken. If you buy a hybrid tree it will not produce further trees. That means you have to buy over and over for good profit of the breeder. HtG
  5. Herman the German

    AWG (American Wire Gauge)

    :-[ I have downloaded a programme calculating for voltage loss in any conductor. It seems helpful using it to design PCBs and the traces. However I do not quite understand which numbers I need to put in fora standard PCB with a copper layer of 35 micrometers. Is there somebody who can put the...
  6. Herman the German

    Suppliers for Laser TX and RX diodes

    :( Checking at semiconductor companies such as Motorola, Texas Instruments, Siemens, SGS-Thomsen (ST) does not show that they are producing laser equipment. Who knows where to get such devices?
  7. Herman the German

    Timer

    Thank you for your help. I checked it and just found a timer. This is not what is on my mind. The timer should have the following properties: Count up and down 999.99 seconds and use optoelectronics to start (car races for instance), switch off the microwave oven after the exact preset time and...
  8. Herman the German

    0-30 Vdc Stabilized Power Supply

    To whom it may concern, I have studied this power supply a bit and found some discrepancies. I can not go along saying that an electronlytic of 3300UF is sufficient for an AC-ripple of 0.01%. 0.1% comes closer according to my experience. I also have made some changes, e.g. the driver for the...
  9. Herman the German

    Software Digital Works

    I have downloaded Digital Works lately but I can't get through to download a registered version of the programme. Using the URL I usually get redirected to another and there is nothing to find concerning "Digital Works". Using the email address the email is returned for unknown address. Who...
  10. Herman the German

    Convert 0-30V 3A PSU to 5A or more

    :D I'll try a completely new way concerning the power stages. 2N3055 is something I have seen in the museum. Two main changes will apply to a power supply with high perfomance. First the transformer will be a ring type (excuse me, my English is not better but may be understood). You can drive a...
  11. Herman the German

    Precise rpm at changing loads

    ??? I got an old 3 1/2 inch disk drive and of course I want to use some parts of it. The most interesting part however is the small stepper motor (bipolar). Connecting it to the shaft of another motor will produce voltage output on the two output coils which can be converted to digital and be...
  12. Herman the German

    help for rpm measurement

  13. Herman the German

    AWG?

    OK. Thank You very much! On the second try I got the whole list. regards HtG
  14. Herman the German

    Constant rpm with tacho-generator

    ::)I found a strong DC motor which I want to use to drill PCBs. It has a tacho-generator output which I think can be used to automatically control a preset rpm. On a varying load the motor rpm will decrease or increase. It should also be run on 24V for maxium power to give at least 20.000 rpm...
  15. Herman the German

    AWG?

    ??? I saw a schematic concerning HV generators. There was an old flyback transformer in the circuit and how to change it. The windings of the primary coil were 22AWG and 18AWG. Germans handle square millimeters and dia millimeter but no AWG at all. How can I convert AWG to metric? Greetings...
  16. Herman the German

    Please help identify this logo!!

    :D This logo is Hirschmann connectors Germany. Take a closer look it is a male deer. (Hirsch is a male deer). Also check hirschmann.de regards Herman the German
  17. Herman the German

    Timer

    A very good idea. maybe I can handle the hardware but not the software. The other way with wired logic is easy to understand and also easy to trace in case of malfunctions. I have made a lot of control units for industrial purposes, but never used a Microcontroller. Wired logic is just my thing...
  18. Herman the German

    Timer

    Hello ante, I wonder why a *.sch (eagle) cannot be uploaded. The file has a size of 78 KB and I think Your mailbox can handle that size. Please send me an email to [email protected] and I will return the schematic. Thank You kind regards HtG
  19. Herman the German

    cpu cooler

    ;)Peltier elements are not the right thing to cool a CPU. If You want excellent cooling You must use a water cooling system similar to engine coolers in cars. They are available in many electronic shops in Germany. Try CONRAD.DE. Of course they are very expensive too because of all the safety...
  20. Herman the German

    help for rpm measurement

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