9
votes
Accepted
Units for rotational impedance
Radians and unit analysis
The comment by MrYouMath is correct. For the purposes of dimensional analysis, the radian is considered a dimensionless quantity and therefore does not need to be included. ...
5
votes
Accepted
Square wave transfer function?
I thought I would expand a little on the answer offered by Karlo.
Long story short, I would not try to calculate the analytical time response of a system to a square wave. That would be a serious ...
4
votes
Designing a Voltage Divider
R2 and RL are in parallel so the voltage across them will be the same so can be treated as a single resistor when thinking about the voltage across them.
So
Req(lower) = (1/R2 + 1/100kohms)^-1
Req(...
- 41
3
votes
Accepted
Electrical potential and grounding in a circuity, why it works?
The issue is certainly NOT that the chassis ground is at -100V, it's absurd. The chassis ground by definition is at equal potential for power supply and load, you can treat it like one big wire that'...
- 5,950
3
votes
Accepted
Arduino DAC to Speaker
Your understanding of the issues is good.
Q1: It's not overkill at all. All of the elements you've mentioned are needed.
Q2: The low-pass filter frequency needs to significantly attenuate all ...
- 156
3
votes
Is there current multiplier circuit?
My input is DC from a small DC motor which I use as a generator.
My input current is 300 milliamps and I need 1200 milliamps as output.
Is there some way to increase the output to 1200 milliamps ?...
- 3,854
2
votes
If I have multiple different DC voltage inputs, how do I get a stabilized output at an intermediate voltage?
If you are trying to get from 6VDC or 10VDC up to 16VDC, you can use a boost converter, and if you're trying to get from 24VDC to 16VDC you can use a buck converter or a "linear regulator".
The ...
- 3,565
2
votes
Square wave transfer function?
You want to look for the Laplace transform of a square wave.
Note: The transfer function $H(s)$ is the ratio of the Laplace transforms of output $Y(s)$ and input $U(s)$:
$Y(s)=H(s)\cdot U(s)$
If ...
- 540
2
votes
Accepted
Designing RLC circuits at specific frequencies for teaching use
Assuming that you have an $RLC$ circuit, the resonant frequency will be
$$ f_0 = \frac{1}{2\pi\sqrt{LC}} $$
so, theoretically, you can pick either $L$ or $C$ arbitrarily and then calculate the other ...
- 249
2
votes
How do they get more signals simultaneously inside a node of a neural network?
First off, neural networks are only very rarely done in hardware, as actual summation of electric signal. Much more often they are just programs that run on standard computers, simulating a network ...
- 6,093
2
votes
Building oscillating magnetic field circuit
To make sure the inductor will respond that fast, you need to solve for the size of the inductor (which will make your magnetic field) which will be resonant at 1000Hz when coupled with a capacitor of ...
- 13.5k
2
votes
Circuit with Contradiction
If the switch is ON then the OR gate output will turn on. The NOT gate will not affect the OR gate.
If the switch is turned OFF (having been on) then OR will turn off which turns NOT on which turns OR ...
- 9,794
2
votes
Accepted
What are the charge/power connector of restaurant order pagers / buzzers called?
The following pins appear to be pogo pins or spring loaded pins
Below are example of pogo pins
The following appear to be swage mount connectors
Here is an example
Reference:
Mill-max
How to pair ...
- 7,115
1
vote
Accepted
Explanation for photovoltaic circuit
Diode Like you assumed
Panels: These are the PV panenls that produce current. They produce DC current I and DC voltage V
Inverter: the inverter converts the DC current and Voltage from the panels to ...
- 24k
1
vote
What signals are expected on the connectors for this 12V Volkswagen Scirroco wiper motor circuit
As indicted in the comments usually the VDC for traditional automotive is 12 VDC nominal, though in most cases it is 14 VDC.
Looks like the below image is from a similar configuration. If the part ...
- 7,115
1
vote
Accepted
What controls the gain in a BJT amplifier, and why does this circuit have a gain of unity?
In this circuit:
The gain from Vin to Vout2 is about 1, and to Vout1 about -1.
That the two gains have the same magnitude with opposite sign can be deduced from the fact that at first approximation, ...
- 11.3k
1
vote
Can different analog and mixed signal devices be combined on a single chip
It is perfectly possible to build your own mixed circuit chip, but you will indeed need to learn quite a few things if you want to do it by yourself.
First I would like to say that what you will do ...
- 334
1
vote
How to provide conditional locking to drawers?
Try a bi-stable lock/unlock mechanism per drawer. A solenoid or perhaps two flip the state of the lock. No power is needed to stay in any one state, only to flip states.
Since the solenoids only ...
- 11.3k
1
vote
How can I calculate overcurrent from over voltage for the AP9101C IC
don't know whether you resolved this.
Answer: Your part has one of the lowest over current thresholds (60mV in table), pick a higher voltage. Unfortunately I can't see how the voltage translates to ...
- 11
1
vote
Designing a loaded voltage divider?
Your circuit works. Proper ground connection.
Your battery would be +12V -(-8V) = 20V. Voltage at Point A = 12V, Point B = 9V, Point C = 4V and Point D = 0V. The circuit is a good place to start.
...
- 2,477
1
vote
How to minimize ozone production while ionizing air?
AFAIK generate your 4kV using off the shelf components. The trick is getting the electrons off the wire, and into the air. Sharp points are your friend here. An electron at the tip is repelled by ...
1
vote
Is learning VLSI design useful for a control/automation engineer?
Control/Automation engineer here. I think it's highly unlikely that you will ever need to design a semi-conductor chip.
In my experience the vast majority of Automation/Control jobs are based on PLCs,...
- 1,890
1
vote
I am trying to create an op amp based negative voltage regulator
I had this same question but was able to solve it. I've attached a picture of my circuit. I know this was asked but I hope this helps someone. The Supply rail is attached to the rippled power supply. ...
- 11
1
vote
Utilize multiple vehicle power outlets to increase wattage capacity of inverter
It is possible that the outlets you want to pair together may have the same supply : relay and / or fuse...
You should connect a set of wires with appropriate fuse directly to the battery, if this is ...
- 15k
1
vote
Adding an R2R Digital to analog converter inline with TRS connector
Okay, I will go ahead and answer my own question.
Since I'll have to deal with an analog signal anyways, coming from the audio output of a mobile device.
I'll need an ADC [analog to digital ...
- 229
1
vote
No Voltage appearing on Pspice
I believe the voltage source you are looking for is Vsin, which is just a sin wave output.
Aside from that as the other answer mentions only use one ground!
- 131
1
vote
Circuit Design Inductor Problem
3.4 µH is not a standard value, but 3.3 µH is. There are plenty of those out there, even in thru-hole.
Inductors aren't generally accurate enough to justify making a 3.4 µH version ...
- 11.3k
1
vote
Accepted
Circuit Design Inductor Problem
Correct - putting inductors in series will result in an effective inductance equal to their sum.
The problem is the extra wiring, and/or change in the wires' paths. Moving two wires closer together ...
- 1,274
1
vote
Circuit that multiples two numbers together?
You seem to be on the right track. You have only 16 possible unique input states, represented as 4 bits. I would start by writing out the truth table containing just the 4 input bits and the 4 ...
- 11.3k
Only top scored, non community-wiki answers of a minimum length are eligible