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  1. Alec_t

    Activating a pump based on water flow

    Good to hear you have it working.
  2. Alec_t

    Beginner needing help - Simple timer circuit for reversing 5v motor

    If the motors are only low torque you will likely get away with instant reversal, but beefy motors should be brought to a stop before being reversed. What is the rated running current of a motor?
  3. Alec_t

    Is a 3000 watt 12v to 120 inverter really just 2 1500 watt inverters ?

    What makes you think a 3000W model = 2 x 1500W models? Bear in mind that many inverter ratings are in Chinese Watts (I'm not suggesting that applies to the one shown), so don't rely on 3kW-US actually being output reliably, continuously, in all weathers by all brands :).
  4. Alec_t

    Gate Charging App Note Problem

    Yes. We do. The end of the rise time is somewhat arbitrary in the sim, hence the average gate current is too.
  5. Alec_t

    Metal Door Loop

    Is this the sort of thing?
  6. Alec_t

    Gate Charging App Note Problem

    LTspice sim gives a rise time of ~1.7uS and Ig(avg) ~ 28mA over that period!
  7. Alec_t

    12v In A Bathroom

    One manufacturer says "A 50cm by 50cm unit uses only 50 Watts of power per hour".
  8. Alec_t

    Activating a pump based on water flow

    Then, as proposed earlier, capacitive input coupling is called for.
  9. Alec_t

    Gate Charging App Note Problem

    Your Vgs is 5V, the datasheet spec's is 12V. You're comparing apples with oranges :).
  10. Alec_t

    Roland XP60 no sound

    Is the keyboard power supply correctly rated for your country?
  11. Alec_t

    Activating a pump based on water flow

    Assuming you can get at least one pulse per second from the flow sensor, and that the default sensor output is 0V in the absence of flow, something like this should do the trick :
  12. Alec_t

    Measuring an IC's input resistance

    The comparator would normally be used for comparing a feedback voltage, from whatever the IC is driving, to a reference voltage. What are you using it for? I don't see why you are driving Vin+ with the MCU.
  13. Alec_t

    Capacitor?

    There's a good chance a cap that size would have a value the same as or close to what you measured. 330pF, 360pF and 390pF are standard values.
  14. Alec_t

    Charging from a 12v battery. Possible to increase current?

    Have a read of this.
  15. Alec_t

    Measuring an IC's input resistance

    Probably junction capacitance. Vcc=30V :eek::confused:
  16. Alec_t

    Charging from a 12v battery. Possible to increase current?

    It's my understanding that many USB-charged devices use the USB data lines to signal to the charger how much current should be delivered. The default current (in the absence of such signalling) is lower than the negotiated one.
  17. Alec_t

    Measuring an IC's input resistance

    Try a DC Operating Point analysis instead of a Transient analysis.
  18. Alec_t

    Tri-level composite signal from microcontroller

    Duke suggested a cap. Here's a sim. Good enough for your needs?
  19. Alec_t

    Tri-level composite signal from microcontroller

    The opamp would need a dual-polarity supply if you want it to put out a negative-going pulse.
  20. Alec_t

    Caustic Corrosion on Water Level Sensor

    Vikas, you are posting in a 2-year old thread. KMoffett may not see this.
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