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  1. bertus

    Clicking Noise from DC-DC Converter powering audio circuit

    Hello, Here I found a page with an external mosfet, but again no capacitor on pin 7 of the chip: https://320volt.com/en/mc34063-yuksek-guclu-12volt-320volt-dcdc-konvertor/ Compare it with your schematic: The timing capacitor is much smaller. There are resistors on pin 1 and pin8. Your...
  2. bertus

    Clicking Noise from DC-DC Converter powering audio circuit

    Hello, I do not see a capacitor on pin 7 of the chip in the datasheet schematic: Bertus
  3. bertus

    Clicking Noise from DC-DC Converter powering audio circuit

    Hello, Is C6 (470 uF) on pin7? If so move it to pin 6. Bertus
  4. bertus

    Clicking Noise from DC-DC Converter powering audio circuit

    Hello, Then try to move the regulation loop from C3 to C1 (right after the diode) and see what happens. Bertus
  5. bertus

    Ebike motor controller

    Hello, Keep the voltage on the 555 between 12 and 15 Volts, to have a high enough voltage to drive the mosfet. Also choose a diode accros the motor that has a current capability the same or higher as the motor current. Bertus
  6. bertus

    Clicking Noise from DC-DC Converter powering audio circuit

    Hello, How much current do you expect to get from the circuit? Resistors R1 and R2 have a quite high resistance. Try to lower them to say 100 Ohms (or even lower) and see how the circuit reacts. Bertus
  7. bertus

    And now something weird

    Fast workers:
  8. bertus

    Comedy Thread

    Thanks to djsfantasi
  9. bertus

    Notable threads

    Hello, This thread will contain threads that can be of interest. Cross reference lists Datasheets on Funkamateur.de Electronics color code Looking for SERVICE MANUAL FOR SYNTHESIZER & ELECTRONIC MUSICAL INSTRUMENT PC power supply schematics and other related info Product pages from some...
  10. bertus

    Using Detuned AM/FM Radio as Spectrum Analyzer Input

    Hello, When you want to use a radio as preset for the spectrum analyser, you will waste the capabilities of the 1000 times more expensive spectrum analyser. When you want to examine the surrounding signals, use an antenna and eventualy an amplifier, as mentioned in post #8. Bertus
  11. bertus

    And now something weird

    lickable TV:
  12. bertus

    Using Detuned AM/FM Radio as Spectrum Analyzer Input

    Hello, I also mentioned the antenna with an amplifier in post #8. The radio will have a to small bandwidth to see the signals. Bertus
  13. bertus

    12V Soldering iron.

    Hello, I would go for a good brand, like weller: https://www.distrelec.de/en/car-battery-powered-soldering-iron-35w-480-weller-tcp-12/p/18230104 You can change the temperature by changing the tip. See the datasheet for more info. Bertus
  14. bertus

    Using Detuned AM/FM Radio as Spectrum Analyzer Input

    Hello, If you want to learn more about RF, read an old hamradio book: https://archive.org/details/arrl-1981-radio-amateur-handbook Bertus
  15. bertus

    Using Detuned AM/FM Radio as Spectrum Analyzer Input

    Hello, Did you see the construction pictures at the given site? They seem to be rather simple. Bertus
  16. bertus

    Using Detuned AM/FM Radio as Spectrum Analyzer Input

    Hello, What is your intention with the spectrum analyser? Do you want see signals from the surroundings? Perhaps a simple amplifier with a short wire antenna will do the trick. This page shows you several amplifiers: https://www.qsl.net/ok1cfp/ok1cfp-vhf-uhf-zesilovac-amplifier-mar-3.htm The...
  17. bertus

    Ok what is it?

    Hello, It looks indeed like a capacitor. Only the value is not a standard value with 4.5 μF. 4.7 μF is the closest standard value. An other thing that is strange is its size. It looks rather small for 4.5 μF. Bertus
  18. bertus

    Buying a Digital Oscilloscope.

    Hello, You may have seen this on the eevbolg page I posted: Updated on 01 January, 2021 It is almost a year old, but not 6 years. As for you budget, the table at that page shows scopes upto 50 MHz. Bertus
  19. bertus

    Buying a Digital Oscilloscope.

    Hello, You might want to read the following primer on digital scopes: https://download.tek.com/document/03W_8605_6.pdf You could also have a look at https://forum.allaboutcircuits.com/ and look for information posted by user tautech. You can also have a look at this thread on EEVblog...
  20. bertus

    Electronics Newbie

    Hello, Have a look at the resources: https://www.electronicspoint.com/forums/resources/ On those pages you will find a lot of information that could interest you. Bertus
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