voltage amplifier

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  1. F

    Adapt 0-5V sine wave signal (centered on +2.5V) to 3.3V analog read input

    I have an analog Since wave signal that is centered at +2.5VDC and maxes out between 0-+5V. I need to adapt it to the analog read input pin of a 3.3VDC (around 10K-16K internal resistance) microcontroller (nRF52840). I built a voltage divider that moved the +2.5V center to +1.65VDC center...
  2. M

    Circuit board to amplify and filter the electrical signals from the piezoelectric disks

    Hi, im working on creating a step counter using piezoelectric disks. The idea is that I want to use the disks as sensors and be able to read their voltage and current values with an Arduino Uno. Im also using a voltage sensor, the sensor that will be used is an ACS712 that can detect the flowing...
  3. M

    I made an oscilator, but i need a amplifier to change the amplitude

    I made this oscillator and the output voltage is 1V, and I need another amplifier to go to 5V and some mv ideally to 10mV, but that is harder. I made this but it doesn't work very well and I don't understand why. I can't work with OpAmps, with only transistors. I put a common emitter with a...
  4. Younes Thabet

    what kind of noise can be introduced in an OPAMP conditioning circuit?

    Hello all, I have 2 almost similar PCBs for voltage and current measurement. I have used 230VAC from the outlet to test them both. The circuit in both boards is similar which is just a voltage divider to reduce the input voltage (see attached image). but I got some noise in one of them even...
  5. Helios300

    AC Voltage and Current Measurement Circuit Design with Differential Amplifiers

    I am trying to finalize the AC voltage and current measurement circuit using a differential amplifier. I have designed two circuits for each. In the high side current measurement circuit 2 and voltage measurement circuit 2, I have connected multiple resistors in series to the inputs of the...
  6. T

    change the voltage range or lower the minimum voltage

    Hello everybody! I have a very basic question, surely I am using the DAC pin of an arduino due, which supplies a voltage between 0.55V and 3.3V, and I want it to supply a voltage between 0V and 5V. how can I do this? Is it possible at least that it supplies between 0V and 3.3V ?. that is, only...
  7. ThyristorWolf

    Design a Voltage Amplifier

    Hi guys.. I have to design a voltage amplifier.. The first task is to develop a voltage amplifier with an open loop voltage gain (with no attenuation due to source resistance and no loading effect) of about 10 to 15 V/mV where 1 V/mV = 1000 V/V gain. The input resistance of your amplifier should...
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