Tagged Questions
2
votes
1answer
54 views
Detached antenna and connecting wire length
Since my this particular question didn't get any answer, I thought of asking a more focused question, along a path which seems a bit more feasible after few tests.
Is it possible to install the ...
2
votes
0answers
61 views
Wireless water level sensor, in sump. Installation best-practices for longivity
My wireless water-level sensor is working fine, and when deployed in the sump-well, it is giving me periodic readings quite well. At this stage, I have the circuit still on a breadboard, and now plan ...
1
vote
2answers
111 views
180 Phase shift for oscillator
I am currently learning how to design/build a crystal radio receiver, transmitter and have a question for the 180 degrees phase shift for the carrier amplifier/oscillator system.
I commonly see this ...
0
votes
1answer
301 views
How to Increase RF Amplifier Efficiency?
I've inherited another engineer's RF design and I would like to increase the transmitter efficiency.
It's a 406 MHz radio that is using 14W to send out 5W (36%). The amplifier in use is ...
2
votes
0answers
57 views
Not sure where to start? [closed]
I would like to like to expand my knowledge on how devices are built and have come up with a semi(probably not though) small project that would I would be able fan out my knowledge as I move through ...
2
votes
2answers
529 views
Range of RF module (and antennae) given then “sensitivity” in dBm?
Is there some simple (maybe somewhat rough, i.e. not very accurate) way to determine the farthest distance that an RF module pair (i.e. an RX-TX, or pair of TRX's) can communicate reliably, given the ...
3
votes
1answer
321 views
Differential LC LPF and Impedance Matching Circuit
I used this online calculator to generator a LC low pass filter with impedance transformation for interfacing a Variable Gain Amplifier (VGA) with an ADC. However the result is for a single ended ...
6
votes
6answers
490 views
Could induction thaw ice?
Last week we had very cold weather; and as a result there were lots of frosted pipes (iron and plastic). I spent a lot of time defrosting metal pipes with a torch, but could not do the same with ...
