11 votes
Accepted

Unknown circuit component with glass encapsulated contacts

It looks to me like a reed switch (I can't be really sure though because the image is not clear enough). A reed switch is an electrical switch operated (usually) by an applied magnetic field. A ...
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  • 22.6k
6 votes

Help with closed loop heat controller (for a non engineer)

Since you seem to not be too familiar with control systems, electronics, and wiring things, I recommend a simple threshold detector that controls a relay. The relay then switches the heating element ...
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  • 11.2k
5 votes
Accepted

Units for plasma etching of circuits: A (with degree symbol)/min

Anisotropic etching is a linear process, like welding, so presumably the units would be distance per time. Unlike welding it is at a small scale. See this slideshare. In this case units are Angstroms ...
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  • 3,971
5 votes
Accepted

In the equation for power as a function of current and resistance, what do the two factors for current represent?

Firstly, by temporal I think you mean spatial. Secondly if you consider acceleration, the units are m/s^2. Seconds-squared are not spatial, but they are temporal. But they needn't be either. Consider ...
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  • 1,274
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(...
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4 votes
Accepted

Looking for a device that breaks the circuit if the voltage gets too low

The simple answer is that you can get off the shelf modules which does exactly what you want. They are often called 'split charge modules' and are designed for installations like boats and motor-...
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4 votes

What is the purpose of the capacitors on LDO Regulator Circuit?

The capacitors serve two distinct functions They serve as "reservoir" capacitors. If the regulator is somewhat remote from the energy source then sudden current peaks will cause $V_{in}$ to dip due ...
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4 votes

Clarification on how current flows from a socket into a device

My understanding is that when you have a circuit with that's connect to a battery they has to be some resistor in the circuit of some kind to ensure the current on the wire is small enough to power ...
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  • 8,229
3 votes

Help with closed loop heat controller (for a non engineer)

In my experience getting data from a rotating component is tricky without resorting to some kind of radio transmitter or a passing the data through a slip ring, which would probably require ...
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  • 2,135
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 ?...
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3 votes

Using Stainless steel or iron pots in oven

If it was a microwave oven then all metals can damage the oven if they are placed in the oven & the oven is operating. If the oven is is thermal oven that is heated by an electric element, gas or ...
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  • 9,447
3 votes
Accepted

How do I calculate voltage at an LED in parallel?

One good place is to start is LTL-307EE datasheet. From the datasheet take look at current profile for the device. Below is the forward current and voltage characteristics. Also take look at ...
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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'...
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  • 4,658
2 votes

SolidWorks circuit simulation?

CircuitWorks doesn't simulate the electronics; it just integrates between some common PCB design software formats and SolidWorks for mechanical information. For example, maximum component height, ...
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  • 318
2 votes

Is battery-charge-stop-at-XX-percent circuitry not cheap?

IBM/Lenovo ThinkPad line is basically the only manufacturer/brand of mobility devices that includes circuitry and software that allows one to vastly prolong battery life of laptops used as stationary ...
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2 votes

How do you find "this" Vx in the given circuit?

You start by making A-B an open circuit. This implies that the current entering or leaving node A from the load is 0 Amps. This implies that the current in the two 1 $\Omega$ resistors have the same ...
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  • 360
2 votes

How do you find "this" Vx in the given circuit?

You are right in that $V_x$ can't be 10 V. Fortunately, 10V for $V_x$ simplifies the circuit considerably, making it particularly easy to analyze. Since $V_x$ is the same voltage as the supply on ...
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  • 11.2k
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 ...
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  • 6,123
2 votes

How would I measure this battery circuit with a multimeter?

If you trying to measure voltage, connect the black connector probe (Terminal) to COM. Move the rotatory switch 20 DCV. The dot should point to 20 DCV. Then place the black exposed probe to negative ...
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2 votes

What's the most practical way to measure angular velocity for small rotations?

I'd use a video camera and attach a striped pattern to form a moire pattern which is easy to see in the video. Here's a link: [http://www.unappel.ch/people/emin-gabrielyan/public/070804-multi-ring-...
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  • 401
2 votes

Circuit analysis, voltage in and voltage out

$R_{23} = {\frac{1}{\frac{1}{R_2}+\frac{1}{R_3}}}$ Resistors in parallel $R_{23} \approx 9.018KΩ$ Plugging in the values $V_{out} = V_{in} \cdot {\frac {R_{23}}{R_{1} + R_{23}}}$ Voltage division $V_{...
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2 votes

How do you create a negative and positive voltage(-6V and 6V) with a singular voltage source?

Partial answer. More later - maybe! Figure 1. OP's circuit. There are a number of problems with your circuit. Your op-amp VCC+ is fed through a 5.6 MΩ resistor. The datasheet says that the quiescent ...
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  • 8,229
2 votes

Switching a Circuit on-and-off In-step with the Rotation of a Drive-shaft (Mechanically)

Without a sketch your setup is difficult to visualise. A typical industrial solution would be to use an inductive proximity switch. These are non-contact, fast switching, water-proof, etc. Figure 1. ...
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  • 8,229
2 votes

Help in Inverse Laplace Transform in Circuit Analysis

To solve this issue, you need to be familiar with Euler's formula: $$\sin(wt) = \frac{e^{jwt}-e^{-jwt}}{2j}$$ You definitely started on the right track with this issue, only finding the right value ...
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  • 1,079
2 votes

How can I get final value of $V_{out}$ at $t=∞$ in RC circuit?

The final value theorem is for a signal, not a transfer function. Use the transfer function to express the output signal $$ V_{\mathrm{out}}(s) = \frac{1}{RCs+1} V_{\mathrm{in}}(s),$$ with input $V_{\...
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2 votes

Simulation of RC circuit using Proteus

Try using a replacing a 9V VDC voltage source with a VAC voltage source. Pay attention to the frequency of the VAC voltage source. This should address the issue. With regard to determining the time ...
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2 votes

How can I create an RL circuit?

Try this. Figure 1. A simple snubber indicator. Pressing SW1 will pass a current through L1. D1 will be reverse biased and LAMP1 will remain off. Releasing SW1 will cause L1's top terminal to switch ...
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  • 8,229
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 ...
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  • 8,229

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