Tagged Questions
0
votes
0answers
67 views
Electronic AC surge protection - modify circuit
I was asked for help with designing an electronic AC overvoltage protection. My buddy was able to design this so far:
However he has no more time for this project and I would like to finish it. He ...
1
vote
1answer
78 views
AC DC Analysis of diode
in the following circuit:
Im looking to find what \$v_D(t)\$ is given \$V_γ = 0.7 V\$ and \$r_f = 0\$.
Now when doing the DC analysis, find that \$VDQ = 0.7 V.\$
But im having trouble finding ...
0
votes
0answers
42 views
Loading effect problem
i m trying to connect a de sauty's bridge(AC bridge) output to a precision rectifier. The problem is the output of the bridge (AC bridge) changes drastically to 5volts as soon as the connection is ...
1
vote
2answers
83 views
Mosfet Circuits Voltage
So let's take a simple cmos circuit like this:
So I get that for DC analysis \$V_G = 12 \frac{R_2}{R_1+R_2} \$ and then \$ V_{GS} \$ makes sense to me...because there is a constant \$ V_G \$ value ...
0
votes
1answer
92 views
Can someone explain impedance in simplest way? [duplicate]
I know in DC it is Resistance of the load.
In AC is it impedance of a line correct? can someone please help me understand impedance and types of impedance.
Zero Sequence, Positive sequence and 2 ...
2
votes
2answers
134 views
Electrical circuit / transformer in series?
I would like to pull out 5v 3A max in series from an already existing connection from the mains 240v 40A connection.
Current circuit:
What I would like to implement:
What are the possible ...
0
votes
2answers
193 views
AC analysis from a DC fresh grad/point of view
So i was finished taking DC circuits and im adept at basic laws like KCL, KVL and Ohms. But today im taking AC circuits and i wondered why things dont work well as before. Lets take this example
A ...
0
votes
3answers
224 views
Basic ac circuit analysis
When are we going to append the "j" term when analyzing ac circuits. When i say j term, im pertaining to opposition to current/impedance. In the image below, notice that Xl is not written as jXl. When ...
2
votes
2answers
607 views
Supplying ac to a dc circuit
So a while ago, i was stumbled upon a post what will happen to the dc circuit when we supply ac to it. Lets assume the ac has the same voltage as the dc. We know that ac switches direcions so there ...
1
vote
3answers
225 views
what is the magnitude of total voltage in the below circuit?
I was working on some RLC circuits and I found a question something like this.
In series RL circuit, \$V_R\$ = 4V and \$V_L\$ = 3V. what is the magnitude of total voltage ?
I just thought \$V_T\$ = ...
1
vote
1answer
158 views
1
vote
2answers
178 views
need a circuit that can switch motor direction by photo or timer input
I have a reversible 115 volt ac motor that has its own internal limit switches to cut the power. It has 4 wires to the motor green-ground and red-hot ,black-hot, and white-neutral. If I have the red ...
