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  2. Hi, Here is a article that you can find an answer to you issue, https://bde-ltd.com/electronic-switch-power-operations-explained/
  3. This seems to be a Multilayer Ceramic Capacitor MLCC 4.7 uF 16 VDC size 0805 https://gr.mouser.com/datasheet/2/281/GCM21BR71C475KA73_01-1968756.pdf Is this what you are looking for ?
  4. It's because it's partially depleted or possible damaged.
  5. Hopefully this is still helpful even after 6 year thanks
  6. The battery voltage of the car key CR1632 is measured as 3V and cannot be used. The newly purchased battery is 3.3V and can be used. Why?
  7. Hi! What is a Murata GRM21BR71C475KA73L? The datasheet talks less. Thanks in advance!
  8. No schematics, just a PCB, want to add a small circuit, but don't know how to add a new net label? Without a network label, you can't connect; it should be!
  9. What does it mean that 222 is written on the through-core capacitor? Does it mean this? 22*(10 squared)=2200pf=2.2nf?
  10. Could you post a schematic to make this more clear ?
  11. What is the fault that the switching power supply made with Uc3844 burns the output voltage terminal filter capacitor?
  12. When designing a switching power supply with UC3843, some of the current sampling circuits are taken through a coil, and some are taken directly from the source stage of the switching tube. How is it determined? How is that coil calculated?
  13. I connect pin 1 to +5V and pin 2 to the I/O port P1.0 of the microcontroller. Why no matter whether the value of P1.0 is 1 or 0, pins 3 and 4 of the optocoupler are not connected (measured by a multimeter)?
  14. Hi, there. Use the 25 MHz reference frequency that comes with the ADF4351 evaluation board, and the output frequency is 1422 MHz. The parameter design is shown in the figure below: Using the output frequency of the spectrum analyzer, Span is set to 100 Hz, VBW and RBW are automatically set, and the frequency is found to randomly jump within a range of tens of Hz near 1422 MHz. Excuse me, what is the frequency resolution of the ADF4351? Can the ADF4355-3 solve the problem? Thanks for the answer.
  15. Hello, everyone. I want to ask If the supply voltage of CD40106 is 12V, can the signal input voltage of CD40106 be 14V? Thanks in advance.
  16. The difference between RS3000-AP and RS3000 is given bolow, and there is a article introducing more about RS3000-AP, you can learn more from here: https://www.utmel.com/components/rs3000-ap-rectifier-diode-features-alternatives-comparison?id=263 Good Listening!
  17. Hi, guys,KAKU here! The block diagram of CC1000-RTB1 is shown below. It seems complicated. So... what is it used for? Thanks in advanced!
  18. This is an OPAMP - Operation Amplifier and can be used in various circuits. Do you have any schematic of board view ?
  19. What does OP27G used for? I saw it on a control card, but I don't know what's the function of it, who can tell me? Thanks in advance.
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