Search results

Search Forums New Posts
  1. bertus

    Sallen Key Low Pass Filter, bandpass filter

    hello, does the ref voltags change when you connect the second lm3914? bertus
  2. bertus

    Sallen Key Low Pass Filter, bandpass filter

    hello, strange, you do have an account over there. you made already 154 posts over there. you likely will have to login to view the page. bertus
  3. bertus

    Sallen Key Low Pass Filter, bandpass filter

    Hello, Decoupling capacitors are place close to the power lines of EACH chip. Read this thread on AAC for more info: https://forum.allaboutcircuits.com/threads/decoupling-or-bypass-capacitors-why.45583/ Bertus
  4. bertus

    And now something weird

    Conjoined twin Abby Hensel, of TLC’s ‘Abby & Brittany,’ is now married to an Army veteran https://nypost.com/2024/03/28/lifestyle/conjoined-twin-abby-hensel-of-tlcs-abby-amp-brittany-is-now-married/
  5. bertus

    Sallen Key Low Pass Filter, bandpass filter

    hello, you could connect the preamp directly to the peak detector circuit. that way you will see all signals going into the microphone on the display. bertus
  6. bertus

    My controller outputs square waveforms in 5 volts PWM SIGNAL. I want to change the waveforms into current waveforms with some circuits.

    Hello, A constant current source will give different voltages with different loads. Bertus
  7. bertus

    circuit breaker alarm

    Hello, I do not see where the wiper of the potmeter is connected. For better understanding of the layout of a breadboard, have a look at the following picture: Also have a look at the attached PDF. Bertus
  8. bertus

    Sallen Key Low Pass Filter, bandpass filter

    hello, yes, that is fine. the gain will be 5.1 in stead of 5.0. bertus
  9. bertus

    Sallen Key Low Pass Filter, bandpass filter

    hello, the value of r4 is not critical. you can use either value there. there are even circuits around where there is a short in stead of the resistor bertus
  10. bertus

    Sallen Key Low Pass Filter, bandpass filter

    Hello, Are you sure that the 100 nF capacitors are electrolytic? If they are electolytic, I would not use them in the filters, but only for decoupling the power supplies. Bertus
  11. bertus

    Sallen Key Low Pass Filter, bandpass filter

    Hello, Yes, if you follow those colors, you will have more overview over the signals. Bertus
  12. bertus

    Sallen Key Low Pass Filter, bandpass filter

    hello, the voltage should be on the + input of the opamp: bertus
  13. bertus

    Sallen Key Low Pass Filter, bandpass filter

    hello, what is the voltage in the middle of the two resistors? bertus
  14. bertus

    Sallen Key Low Pass Filter, bandpass filter

    hello, no, that is not correct. when the battery voltage is 11.55, i would expect the ref voltage to be about 5.77 volts. are the resistors of the voltage divider the same value? bertus
  15. bertus

    Help identifying components in old board

    Hello, That are likely 200 volts 1 ampere diodes. Bertus
  16. bertus

    Sallen Key Low Pass Filter, bandpass filter

    Hello, I think you mean the pins 6 and 7 of chip 1 and the pins 4 and 8 of chip 2, that are static analog signals, so that could be yellow. Take some color markers and draw the colors in the schematic, by following the lines. Bertus
  17. bertus

    Sallen Key Low Pass Filter, bandpass filter

    Hello, The output voltage of the ref circuit should be about half the power supply voltage. You measure it between the minus of the power supply and the ref output. Bertus
  18. bertus

    Sallen Key Low Pass Filter, bandpass filter

    Hello, You could see the leds as digital signals as they can only be on or off. Bertus
  19. bertus

    Sallen Key Low Pass Filter, bandpass filter

    Hello, An other tip is use different colors of wire. For example: Positive power red. Negative power black. Ref blue. Analog signal yellow. Digital signal brown. Bertus
  20. bertus

    Sallen Key Low Pass Filter, bandpass filter

    Hello, I assume you connected pin 2 (V-) to the minus of the power supply and pin 3 (V+) to the plus of the power supply. Bertus
Top