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fm - Controlling DC (Pager) Motor with Audio Signal ...
https://electronics.stackexchange.com/questions/489/controlling-dc-pager-motor-with-audio-signal
I'm trying to control a DC (pager) motor with a sound signal so that I can use an audio synthesizer to control the speed of the motor. I'm hoping to modulate the speed of the motor at audio rate (1-200hz). I need to do a few things. Convert AC -> DC. A rectifier will chop the negative or fold it up, but how can I shift the waveform up, per se?
Taking a audio signal and driving a DC Motor | Electronics ...
https://www.electronicspoint.com/forums/threads/taking-a-audio-signal-and-driving-a-dc-motor.132535/
amplified audio signal to a small 1.5v - 6v DC motor. It needs to be able. to speed up when the sound is louder, slow down when there is less sound. and stop if no sound. It needs some type of regulator or something to cut. the voltage to a max of 6V DC.
DC biasing audio signal - Electrical Engineering Stack ...
https://electronics.stackexchange.com/questions/14404/dc-biasing-audio-signal
Run your audio signal through a DC blocking cap then have a resistor to the bias power rail. This approach has less noise and harmonic distortion than the simple resistor-divider-- although the difference in performance is only important for those in the pro-audio world and not worth bothering with for most.
how to convert Audio signal to DC usable for ADC : electronics
https://www.reddit.com/r/electronics/comments/11q25m/how_to_convert_audio_signal_to_dc_usable_for_adc/
Add your audio input signal to a 2.5V reference (similar to what mingy suggests), making sure that the maximum voltage (positive peak + 2.5V bias) never exceeds 5V (maybe using a diode). This way your signal is not differentially coupled to your input, which may or may not be a big deal for what you're doing. 1.
DC Offset - Hack Audio
https://www.hackaudio.com/digital-signal-processing/amplitude/dc-offset/
DC Offset. If multiplying a number by a signal scales the amplitude, adding a number to a signal performs an offset. From a waveform plot, addition shifts the value of every sample up (or down) by the same amount. The term, “DC Offset,” is commonly used by audio engineers to describe this operation. From the days of analog circuits, there ...
Audio Frequency to Voltage Converter
https://web.mit.edu/6.101/www/s2020/projects/erickrod_Project_Final_Report.pdf
Audio Frequency to Voltage Converter Erick Rodriguez Hannah Savoldy May 14, 2020 Abstract This project focuses on producing an output that is proportional to an input audio frequency. To find the highest amplitude frequency in a signal, a series of bandpass fil-ters is used, one of which yields a pure sinusoid of the desired frequency. By compar-
Is an analogue audio signal DC or AC? - Factual …
https://boards.straightdope.com/t/is-an-analogue-audio-signal-dc-or-ac/474740
Thus, an analog audio signal can be either pure AC or AC with a DC bias. Superfluous_Parentheses November 27, 2008, 10:21pm #3. Q.E.D: Pure AC is a time varying electrical signal which periodically reverses it’s polarity, crossing zero twice per cycle. Pure DC is a constant, unvarying signal.
Controlling the speed of a motor with sound input ...
https://forum.arduino.cc/t/controlling-the-speed-of-a-motor-with-sound-input/353875
...to a DC or PWM motor shaft. You can control the speed of a DC motor with PWM. But to go that slow you'll need a geared-down motor (or a big load on a small motor). And, you'll need a motor-driver circuit because the Arduino cannot directly power a motor. I would simultaneously also like to have the amplitude of 3 specific frequency ranges(ie.
Project: Converting Audio to 0-4VDC Signal for ...
https://forum.allaboutcircuits.com/threads/project-converting-audio-to-0-4vdc-signal-for-animatronics.44738/
The op amp output is sent to an envelope follower which is a simple RC circuit to smooth out the remaining audio oscillations. I used a Schottky diode to minimize DC signal loss. There is also an audio amplifier circuit based on the old standby LM386 on the board as well. Additionally, I planned on using the two separate channels of a stereo ...
Block Diagrams | Electronics Club
https://electronicsclub.info/blockdiagrams.htm
The power supply (not shown) is connected to the audio amplifier block. Aerial - picks up radio signals from many stations.. Tuner - selects the signal from just one radio station.. Detector - extracts the audio signal carried by the radio signal.. Audio Amplifier - increases the strength (power) of the audio signal. This could be broken down into the blocks like the Audio Amplifier …
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