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20 views

Electronics Board Debugging [duplicate]

I have a board with 2 input voltages; one of them is 5V and another is 12V. I set 12V adapter to 5V absolutely in a wrong way. so I've found myself in a big problem. hope you guys help me to fix it so:...
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0answers
30 views

Diode Circuit analysis [duplicate]

how can i solve circuits like this ?! how current flow though determine the diode modes and calculate V and current in branches
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0answers
48 views

Common base and emitter transistors? [closed]

How does amplification and both direct current and voltage flows occur in transistors (bjt) (common emitter configuration). and if Beta (B) is the amplification factor, why doesn't common base ...
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1answer
22 views

Graph of Thermistor against Temperature

Assume that I had a circuit as such above. I was wondering, if I increased the temperature of the surroundings, what would a graph of the temperature/PD graph look like? I know that Resistance ...
-1
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1answer
48 views

Short circuit and voltage source

I don't understand why when you replace a wire between a and b with a short circuit, you could just ignore 160 Ix voltage source. I understand that those two resistors in parallel will be shorted, ...
0
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2answers
23 views

Why do ideal Op-Amps have zero offset voltage?

Why does ideal operational amplifiers have zero offset voltage? Is that because it has infinite gain?
0
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1answer
49 views

How would I design an S-R flip flop under these given conditions? [duplicate]

Given an AND gate, an OR gate, and inverters as needed, design an SR flip flop with S and R active low (0). I understand that to make such a flip flop, I would have to place inverters on the circuit ...
0
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2answers
56 views

trouble with making and gate

i'm having trouble with making an AND gate on this circuit simulator website 123 circuits. This supposed to be AND-gate only responds to input from switch 1 on the dipswitch and 2 doesnt affect it at ...
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0answers
18 views

How to treat diode in transient circuit analysis [duplicate]

Hi, this fig is a model of a circuit, where the cap is representing the gate-to-source capacitance of a hi-side FET in a bridge circuit driving a coil. VD is the intrinsic diode in the FET from ...
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0answers
32 views

How actually sign reversal of output signal and the input signal takes place in case of amplification of transistor? [closed]

How actually sign reversal of output signal and the input signal takes place in case of amplification of transistor? I am a class 12 student so make me understand accordingly.
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0answers
72 views

why do we need a diode in a circuit? [closed]

i know that a diode allows electron flow in a single direction.But doesn't this happen in a circuit even without a diode (for dc source). then why do we need a diode.
2
votes
1answer
101 views

Is eMMC really a good choice for a low-volume long-product-life design?

We're looking for a flash device for a low-volume (batches size < 100) industrial product, in the 2/4/8 GByte range. In applications like this we've previously used SD card, which is an obvious ...
7
votes
2answers
504 views

Any reliable site where *hardware* engineers can be hired for small (work-from-home/telecommute) projects?

For software hackers/developers there are many. However, I need a hardware guy (or girl?) for a relatively small project. Is there a site where I can search for people and see ranks, ...