# Tagged Questions

591 views

### transmitting 5v signal over a long cable

I'm seeking for help here as I need a reliable answer to this. I need to get an input signal (low frequency 5v digital pulse), to a micro-controller from a ...
121 views

### Sampling frequency required to detect peaks

I am processing a signal in the digital domain and I have to detect "peaks" in it, e.g. by finding local maxima formed by three consecutive values. (More sophisticated criteria could be used like ...
155 views

### How can I tell if something's controlled by an analog or digital input?

Is there a way to tell if something's being control by an analog or digital input without knowing and understanding all the rest of the circuitry involved? I have a Wowwee robot (Elvis) that I'm ...
517 views

### How to decode morse code with digital logic

I have been curious as to how one might implement a morse code decoder with basic digital logic (no microcontroller), mostly as an exercise. I could decode individual letters with a state machine, if ...
247 views

### How to write a simple feedback loop in difference equation?

I know how to write a simple close loop transfer function which is http://en.wikipedia.org/wiki/Control_theory Now I need to do it in difference equation form, like the equation in ...
705 views

### Effect of parasitic capacitance on an ideal signal?

How does parasitic capacitance affect an ideal signal? Ie. We have an ideal signal shown below, what would it look like with parasitic capacitance accounted for?