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  1. bertus

    small transmitters

    Hello, Search and read a lot about the stuff. The following series of books on the internet archive tell you all about RF systems: https://archive.org/details/folkscanomy_electronics?query=microwave+rf+3ed&sort=-publicdate Bertus
  2. bertus

    small transmitters

    Hello, That is not what he wants. The shown chip is for the ISM bands. He wants a transmitter for 3G or 4G. Bertus
  3. bertus

    How can I make a switch actuated by a signal

    Hello, The same question is asked on AAC: Simple circuit help. Bertus
  4. bertus

    small transmitters

    Hello, What network tower are you talking about? What kind of signal is used? Bertus
  5. bertus

    Comedy Thread

  6. bertus

    Comedy Thread

  7. bertus

    small transmitters

    Hello, What will be the purpose of the transmitter? The battery will likely be already larger. https://www.google.com/search?as_st=y&tbm=isch&as_q=small+transmitter&as_epq=&as_oq=&as_eq=&imgsz=&imgar=&imgc=&imgcolor=&imgtype=&cr=&as_sitesearch=&as_filetype=&tbs= Bertus
  8. bertus

    electric kettle shorts

    Hello, The main causes of failure of heating elements are given below: 1. Formation of Hot Spot: Hot spots are the points in the heating element which are formed at higher temperature. One of the reasons of formation of hot spot in heating element is high rate of local oxidation that may...
  9. bertus

    Step Down Bypass

    Hello, Try this, as @danadak suggested: The SR diode will drop about 0.5 Volts at 5A. Bertus
  10. bertus

    Is it possible to build an homemade mobile signal amplifier?

    Hello, Unfortunately sites like instructables and youtube have a lot of projects that will not work. Bertus
  11. bertus

    Tektronix 465 oscilloscope with garbled display

    Hello, Bama has also manuals for different revisions available: https://bama.edebris.com/manuals/tek/465/ https://bama.edebris.com/manuals/tek/465(2)/ Bertus
  12. bertus

    Book Reviews

    Hello, The internet arhive has now a couple of the "for the evil genius" books online: For the evil genius Bertus
  13. bertus

    Need help about switch power supply circuit

    Hello, Q1 and Q2 make a so called PUT. Look at step 6 of the following page for more info: https://www.instructables.com/Circuit-Collection-of-the-Programmable-Unijunction/ Bertus
  14. bertus

    OpAmp demystification

    Hello, Here is an other PDF on opamp circuits. Bertus
  15. bertus

    OpAmp demystification

    Hello, Have a look at page 29 of the attached PDF. It will show you the following circuit wit explanation: Your circuit has an extra RC on the input. Bertus
  16. bertus

    Want to copy ultrasound tooth regeneration device.

    Hello, I will close the thread before more harm is done. Bertus
  17. bertus

    problem with 48vdc motor destroys relay

    Hello, @Minder , Perhaps the schematic is only to show the connection and not the actual relays. We will have to wait for an answer on the actual used relais part number. Bertus
  18. bertus

    problem with 48vdc motor destroys relay

    Hello, Without the datasheet of the used relay, it is impossible to say what is happening. Wich type of relay are you using and how it it driven? Bertus
  19. bertus

    Is it possible to build an homemade mobile signal amplifier?

    Hello, It is not possible to amplify the 4G signals with a LM358. The LM358 is made for audio amplifiers, the kHz range and not RF wich is the 4G signals with frequencies upto 2100 MHz. See this page for more info: https://powerfulsignal.com/cellular-frequency-bands/ Bertus
  20. bertus

    Books on RF design

    Hello, Here is a series of books on RF design: https://archive.org/details/folkscanomy_electronics?query=microwave+rf+3ed&sort=-publicdate Bertus
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