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Recent content by SolarTrap

  1. SolarTrap

    noise from MOSFET?

    Do you mean something like this:
  2. SolarTrap

    noise from MOSFET?

    Yes, the 200mA might be tight but I am running the LEDs on 6% power - that should be ok. There was a typo: LEDs are of type WS2812, also the mic is electret. here is the updated schema. The GND is the Battery neg pole. I am not showing the LEDs which are also using switchGND:
  3. SolarTrap

    noise from MOSFET?

    Hello all, I want to replace a slide switch with a software controllable MOSFET and found this example (see drawing). I set it up on a breadboard and it works really nice with the ATtiny. Now I want to use this for my existing circuit to basically replace the slide switch in the read circle...
  4. SolarTrap

    Battery protection low voltage disconnect issue

    To solve the puzzle: attached is the fixed circuit. In- and output to the mosfet module was swapped
  5. SolarTrap

    Battery protection low voltage disconnect issue

    Yes DW01, attached: https://files.engineering.com/getfile.aspx?folder=9af29944-e0e5-44dd-8caa-3a728b71c4c5&file=DW01A-G.pdfhttps://files.engineering.com/getfile.aspx?folder=9af29944-e0e5-44dd-8caa-3a728b71c4c5&file=DW01A-G.pdf
  6. SolarTrap

    Battery protection low voltage disconnect issue

    So I removed R8 and now i read 0V !! Is the circuit wrong? I have attached the 'typical application' diagram from the specs...
  7. SolarTrap

    Battery protection low voltage disconnect issue

    This means I remove R8 as a test?
  8. SolarTrap

    Battery protection low voltage disconnect issue

    So i removed the FS8205A and I still measure 0.7V what I can measure now is a is -0.2V (when the battery is completely removed) coming from the 25x WS2812 LEDs when they are exposed to light.
  9. SolarTrap

    Battery protection low voltage disconnect issue

    I ran the darkness experiment and it has no impact. I do not even understand why it would matter as the battery monitor disconnects GND from Battery Minus (via the FS8205A component).
  10. SolarTrap

    Battery protection low voltage disconnect issue

    Hello all, just got my first EasyEDA project back from JCLPCB and it’s almost as I envisioned it. My issue is the under voltage protection. It correctly disconnects the battery but I can still measure 0.7V between Vcc and GND. My question: how to track down this issue? I have attached the...
  11. SolarTrap

    5V booster and battery protection

    Hello, I created a project that is using a 328P to drive 24 LEDs (WS2812) which can draw 2A. I used a guy to make a PCB layout (attached) and ordered an assembled version but something with the boost circuit is not working right. He used a LTC3872 to boost 3.7 to 5 but the circuit runs the...
  12. SolarTrap

    How is the power via USB filtered in an Arduino Nano

    Hello all, I have an issue with the 5V input to the Arduino Nano. I noticed that when I power (using a power bank) my Nano via the USB port I get a clean ADC reading from my microphone but using the same power via the Vin pin I am getting noise. This makes me think there is a filter in the...
  13. SolarTrap

    How calculate maximum PWM frequency for MOSFET

    It is used for a charge controller. The typical 500Hz generates some audible noise and 100kHz makes the mosfets really hot so I was looking for the best alternative.
  14. SolarTrap

    How calculate maximum PWM frequency for MOSFET

    Hello all, I would like to know what the maximum PWM frequency would be that I can drive this MOSFET: http://www.vishay.com/docs/72439/sum110p06-07l.pdf There are a lot of delay times given but even if I take the highest number (200ns) for 'turn-off time' this would result in 5 MHz. But this...
  15. SolarTrap

    Issues with analogRead when using Vin on Arduino

    Correction: it looks like I am not connecting to USB GND directly I am connected to the USB shield which has a ferrite bead (BLM18PG471SN1D) in line with it.
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