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Recent content by iw1au

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    What does payload exactly mean in satellite electronics?

    I would say yes! Any mission has its "load"... that has to pay the satellite, laucher and so on and as consequence it is a no sense to lauch a satellite that has a "payload" that doesn't work! (Just to be a little funny, but you can image what it means from economical poin of view...)
  2. I

    What does payload exactly mean in satellite electronics?

    I work in such "domain"! The payload is the reason of the satellite mission, e.g. for observation satellite it could be optics or X-ray radar.... for telecom is the TV transponder and so on. The rest is as a "lorry" that allow the complete functionality of the satellite, payload included!
  3. I

    Driver for 2 coils latching relay

    Sorry for late reply, but you gave me an idea, using a simple capacitor... I have to find an half of hour to test with real relay and, if it works, I will post the results...
  4. I

    How to generate a Gerber file format by CIRCAD?

    Hi to All! I have a poor experience with CIRCAD, but some year ago I made a simple PCB (one layer only) using it. File extension is .PCB A producer of PCB prototypes (or small series) requires Gerber files to do the job. In CIRCAD there is an option that apparently allows to save in Gerber...
  5. I

    Driver for 2 coils latching relay

    To be honest I am a little bit surprise; why a "discharged" inductor should ask more current at the beginning? This is for capacitance, as far as I know...
  6. I

    Driver for 2 coils latching relay

    Sorry for late answer (business trip!). It seems a really good start! :idea: I did some fast checks and I noticed that capability of 555 is up to 200 mA (not so far from my need, taking into account 50 ms or less only!) and the 555, in Monostable mode, when powered on, do a single cycle! So the...
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    Driver for 2 coils latching relay

    Hi to all! I found a nice relay for RF, with great insolation crosstalk, that I wish to use for my 1.2 GHz band. This relay is double coil 12 V latching, one to be dedicated to TX and the other for RX. I have fortunately the 2 signals TX and RX that remains stable until change of status (if RX...
  8. I

    435Mhz Yagi antenna .. Help on Impedance

    Because they are wrong! A simple linear dipole has around 75 ohm, while a folded one around 300 ohm....
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    Manuals and circuit diagram to download for free...

    Maybe I am a little bit [OT], by the way, following the above link You can find a lot of manuals and circuit diagrams for free related to radioamateur. For students and young professionals could be a good source to inspire themselves, being these manuals made by significant company...

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