# Tagged Questions

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### How can a logic gate work with multiple signals if a circuit only (supposedly) uses one electrical line?

On, say, a circuit for a lightbulb there's only one line for the current to flow, and that current is illustrated in every circuit I have ever seen. Being a beginner to this I am wondering how that ...
107 views

### Correct way to convert square signal to sine waveform

I have a square form signal that can change frequency from 100kHz to 200kHz (more precisely, the '1' is coded by 200kHz part (2 oscillations) and '0' is coded by 100kHz). The amplitude is about 2.5V. ...
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### Will a PSU with Active PFC Work with Normal UPS

Im getting a Seasonic SII 620 with Active PFC.The problem is that i have a pseudo sine wave ups or just a normal UPS.Will this PSU work with the back up power offered by the UPS?
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### Why does my wave signal from AD9850 / AD9851 DDS get cut off?

I have the AD9850 and AD9851 version of this board. I have written the necessary code to interface these with my microcontroller. However, when I sample the sine output signal from the DDS it gets ...
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### which one is better for smoothing a sine wave: Low pass filters or a serially connected inductor?

Smoothing a sine wave is my main concern in this question. I have a sine wave made by DDS that in higher frequencies shows some steps. Normally in every electronic class it is heard that the best ...
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### How to make sawtooth wave from square or triangular wave?

I know it is easy to convert a square wave to a triangular wave by an integrator. I know also that they can be made out of Harmonics but I don't know how to make a sawtooth wave form. Having a ...
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### Can I differentiate between a UPS, Generator and Main sine wave using a micro-controller?

Are there any distinguishing features of a mains power supply that will allow me to tell the difference between mains power supplied by the utility company, a generator, or a UPS? How can I use a ...
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### Superimposed sine wave

The following circuit modulates the SIG wave with a 1kHz CLK signal and produces the OUT resulting wave. I have read that the superimposed wave has an amplitude of the sum of the original waves. If ...
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### STM32 crashing to Default_Handler

My STM32F4 Discovery is crashing when I try to run the sin or sinf function with the FPU enabled and with the FPU disabled. ...
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### How to generate 30Hz sine wave?

I'm building a voice ring modulator. Part of it involves a 30Hz carrier sine wave to modulate the voice with. Since I'm trying to build a portable device it will be DC powered, and since a function ...
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### 12 volt DC to 12 volt AC sine wave inverters for 10 watt and 22 watt pumps

I have two 12 volt AC small water pumps that I want to run on 12 volt DC (solar). One pump is rated 6 watts (max ~10 watts) and the other pump is rated 16 watts (max ~22 watts). Since I need to ...
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### Generate sine wave in VHDL, with the use of 10-bits DAC [closed]

I want to generate a sine wave with 20Mhz frequency, using a FPGA (Cyclone 3 EP3C10E) and an external 10bit DAC converter (http://www.analog.com/static/imported-files/data_sheets/AD7533.pdf). I have ...
276 views

### Calculate transfer function with Sine generator

Given this circuit I would like to know how can I find it's transfer function. A method I've considered was to use Node Equations on nodes 1 and 2 , and I have a few things that I don't find clear ...
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### Generating a differential signal

I was given a small task (actually it's part of a much larger task) where the requirement is to generate a signal which looks like it came from a microphone. The following requirements needs to be ...
1k views

### Ultrasonic Transducer driver

I found some youtube vids on Ultrasonic Cleaning, and thought it would be a cool DIY project. On eBay I found this. Some other transducers in the same range requires 400-800V supply. Anyone have any ...
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### Square wave / Sine wave is more audible

Consider you have 50 Hz both square wave as well as sine wave put on to a same speaker at different time. Which signal is more audible and what is the reason behind that ? We know that by taking the ...
659 views

### Measure AC Sine Wave amplitude with ADC

I have created an AC sine way using a wien-bridge network. I would like to measure the peak to peak voltage of this wave using my microcontrollers ADC. I cannot just use this wave as an input to my ...
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### Transformation of Sin wave

I was impressed by your solution of my previous problem. So, I think you may help me with this image I have made huge circuit with OpAmps and couple of active and passive components, but I suppose ...