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  1. A

    110v supply

    sometimes it may be easier to wind some more turns in the opposite direction to subtract from the voltage.
  2. A

    0-30 Vdc Stabilized Power Supply

    Good point.
  3. A

    0-30 Vdc Stabilized Power Supply

    Shouldn't the ammeter be placed after point 3? That way all the current will go through the meter including transients from the output cap.
  4. A

    Help me to understand the MC3359P IC

    The RSSI (Received Signal Strength Indicator) is the output from a internal log detector
  5. A

    Frequency to voltage

    Good! I see you used an integrator to give you proportional voltage according to pulse width. Then it looks like you inverted this and scaled it with your last opamp. There are many ways to do this. Some methods will give you very good linearity and other not so well. It appears that you operate...
  6. A

    Please help identify this part

    FG looks to be mainly by Philips and Siemens. http://www.tkb-4u.com/code/smdcode/smdcodeF.php
  7. A

    Switch needed

    I had the same circuit in mind. Some of the small sensitive relays will switch on this method. You can use 5V relay to help with the switching. You may need play with the capacitor value to get the right action.
  8. A

    SPAM problem

    But why can't you for instance log the specific offending IP and blacklist that? Rapidshare uses this method to restrict free downloads from their servers within a time frame. If someone on some occasion experiences a posting problem that can be handled on a case by case basis by emailing admin...
  9. A

    SPAM problem

    These spammers must be getting desperate if they now have to invade groups like this. I wonder how difficult it is for admin to just block their IP's from registering again. There must be a way to stop these idiots from spreading their filth here over and over again. They can easily register...
  10. A

    Frequency to voltage

    Here are some hints:- Square up your input frequency Apply to the monostable to get fixed pulse width on every cycle Filter the pulses with a low pass filter Scale and calibrate output with opamp if needed Voltage reading should be proportional to applied frequency
  11. A

    sigle node voltage from two node

    Post your circuit cause you must be doing something wrong.
  12. A

    transmission lines

    Specify if you are talking about ideal cases or practical cases. If we know what you are talking about then we can give answers, otherwise it becomes confusing! At the moment I can't follow your reasoning.
  13. A

    RC-(remote controlled) Car

    Into a 50 Ohm load 0dBm =  1mW 10dBm = 10mW 20dBm = 100mW
  14. A

    sigle node voltage from two node

    I am not sure I understand the problem but you can use a comparator to switch high to 5V when the level of 1.43 volts is exceeded.
  15. A

    transmission lines

    The resonance conditions in the coax will happen only at a 1/4 wavelength (when the coax cable is 1/4 wl long)
  16. A

    transmission lines

    It all depends what you want to do.
  17. A

    transmission lines

    There are a few conditions of importance. Example: 1) for lines < 1/4 wavelength 50Ohm source into 50 ohm (Zo) line, OC at the end appears (capacitive) 50Ohm source into 50 ohm line, SC at the end appears (inductive) 50Ohm source into 50 ohm line, Rl at the end (Rl> Zo)appears...
  18. A

    LCD for Fluke 80's Benchtop Meter

    look on ebay. They go very cheap
  19. A

    How to transmit music from PC to music system wirelessly...??

    Anything to make the budget work will do! One guy refused to answer the door when they visited him and was fined $10000 for transmitting on 103MHz over the power limit.
  20. A

    How to transmit music from PC to music system wirelessly...??

    They do get caught, more quickly if they cause interference or there's a complaint. On the FCC page there is a massive list of all the instances of people caught or warned. http://www.fcc.gov/eb/FieldNotices/ Ramsey was also fined many $1000's for selling high power (1W) transmitters. The FCC...
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