Tagged Questions
1
vote
1answer
69 views
connection from an comparator to an optocoupler
I have the circuit below to decode a signal that is defined as Logic high >9.5 V and Logic low <6 V
To determine the ...
1
vote
2answers
134 views
Problems when sharing a battery between motors and radio in an RC car
Background
I am building an RC Car that I am trying to modify to control from an Android phone.
When I connect the remote control module as well as the car circuitry (servo & motor) to separate ...
0
votes
4answers
112 views
How input current affects circuit? Is it ignored?
All the examples I have seen so far, take the input voltage as-is and start calculating circuit current depending on on-board resistors using ohm's law etc.
Can you just ignore the original current ...
-2
votes
1answer
114 views
Current amplifier concept in solar panel [closed]
Whether the output of the solar panel is given to a current amplifier to increase the ampere rating? So that we can increase the ampere hour rating of the battery which will be connected to the solar ...
0
votes
2answers
361 views
What is meant by relative voltage?
Suppose you have a circuit
,you are told that the voltage at point 2 relative to point 1 is -90V, the voltage across R2 is -30V and V0 is 200V.
What is the meaning of voltage at 2 relative to 1? ...
1
vote
1answer
151 views
What's passive about the passive sign convetion?
I've heard and read about the passive sign convention, but don't really understand its meaning and importance in solving electric circuits. Is this because of conventional current which flows ...
2
votes
3answers
764 views
Calculate how much current is a microcontroller's pin drawing
I am reading up on microcontrollers and I want to know the current that RA0 is drawing when the switch is open but I think I'am getting it wrong. Also my electronics knowledge is elementary at best.
...
1
vote
2answers
185 views
Thevenin Resistance?
I don't understand our professor's explanation for the answer to this problem:
An LED is connected in series to a 150ohms pull up resistor and a MOSFET with drain-source resistance of 3ohms. The Pull ...
4
votes
1answer
202 views
Understanding a transistor configuration
I started watching this video series on a DIY lab power supply by Dave @ EEVBlog.
On his video he's analyzing mostly simple constant current circuit. However, at the top of the circuit there's two ...
