# Tagged Questions

138 views

### Measuring Distance using Phase Shift

I'm trying to make a pair of devices which can measure their distance from each other (within 50 ft., irrespective of orientation). The basics of a robust solution are described in this comment, but I ...
96 views

### Why is channel capacity a factor of bandwidth instead of frequency?

I'm trying to understand the concept of capacity for a wireless channel. Some help would be appreciated. For a AWGN channel capacity is calculated as: $C=B*log2(1 + S/N)$ bits/sec B = bandwidth. ...
147 views

### How to reduce motor electrical noise?

I have made RC car using using ht12e and ht12d, two geared DC motors, RF module. Now my problem is that when motor starts rotating, it is generating some kind of RF signals which are interfering with ...
58 views

### signal generator recommendations [closed]

There is a lot of literature online comparing and contrasting oscilloscopes to help the hobbyist determine the best value for his money. I have not found similar information (at least not ...
239 views

### Is sending a signal over 433.92 MHz blocked by plastic?

to be honoust: I never understood radiowaves; how I can receive radio in my house? Transferring a complete video through air from laptop to router? Never a clue. So with that (lack of) knowledge my ...
447 views

### Measuring Signal Strength with a RF Circuit

Note: I'm primarly a 4th year Computer Science student, but I have also interest in electronics but I have very limited knowlege. Is it possible to measure the signal quality or level of a RF ...
191 views

### Decoding 125kHz ASK signal [closed]

I'm looking to decode what seems to be a 125kHz ASK amplitude shift keyed signal (1 V p-p). I'm saying ASK, but it may not be the right term. It's basically a 125 kHz signal or a 1V constant voltage. ...
556 views

### Communication - 2 Battery Powered Circuits, 1 Conductor, no common ground

TL;DR I need to do is successfully transmit a wave across a single conductor between two battery powered circuits with no common ground. I already know how to create the wave and detect the wave when ...
209 views

### Noisy data line clears up on wiring up multiple output pins of uC to Logic Analyzer

Some people reading my question might be familiar with a string of questions (latest being this one) where I have been asking about how to decode data from an ISM-band ASK/OOK type RF receiver module. ...