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  1. J

    Power factor

    A simple way to think about power factor is the difference between the power you draw from the supply and the power that actually does useful work. Resistive loads like heaters are usually close to a power factor of 1, while motors and transformers often have lower power factors because current...
  2. J

    Tantalum capacitors Vs. Aluminium capacitors for synchronous switching converter input pin.

    In my experience, the capacitor's ESR and ripple current rating are usually more important than whether it's tantalum or aluminum. As long as the part meets the regulator's stability and ripple requirements and is placed close to the input pins, either technology can work well.
  3. J

    help with IR2110 chips

    At those voltages and switching conditions, layout and grounding can become just as important as the IR2110 itself. Long gate traces, poor bootstrap capacitor placement, or insufficient decoupling can easily cause unstable high side drive behaviour. I’d also verify the low side first with a...
  4. J

    JK Flip-Flop Toggles Twice from One Button Press

    What you describe sounds more like incomplete debouncing than JK clock sensitivity. A JK FF will happily react to every threshold crossing, so a bouncing button can look like multiple clock edges and cause double toggles. An RC alone is often not enough because the clock input may linger in...
  5. J

    Which MCU do you prefer — ESP32 / STM32 / RP2040 / Arduino?

    My quick pick by use case are: IoT & Wireless → ESP32 Industrial Embedded → STM32 Learning & Creativity → RP2040 Fast DIY Prototypes → Arduino
  6. J

    ESP32 LED control, power issues

    If your ESP32 LED control is facing power issues, the most common cause is insufficient or unstable current supply. Avoid powering LEDs directly from the ESP32 GPIO pins, as they can only supply limited current. Instead, use an external power source with a proper driver like a transistor or...
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