All Questions
Tagged with resistance voltage-divider
37
questions
7
votes
5
answers
7k
views
Are these 2 resistors in parallel?
So I had a circuit to analyse and I needed to find the equivalent resistor and then I arrived to a confusion. Are R1 and R3 in parallel?
Here is the circuit.
simulate this circuit – Schematic ...
- 109
-2
votes
1
answer
987
views
How to calculate current in voltage divider with load?
Say, I have this circuit (please ignore the zeros, and the diode should be some load that draws 10ua):
So, \$V_{in}\$ be 12V. I would say that D1 gets \$\frac{R_2}{(R_2+R_1)}\cdot2V\$ as voltage. ...
- 139
2
votes
1
answer
2k
views
Fuel sender - need something to convert ohms to volts?
I need to connect a cars fuel sender(ohms) to a analog input on a GPS tracker (volts)
Here's the catch, in our tests most fuel senders we worked with seem to send the data as ohms/resistance
However,...
- 121
0
votes
1
answer
487
views
Want to convert 14.8v to 5v at Max 30 Amp current draw
I want to convert 14.8v to 5v at Max 30 Amp current draw. IS this possible using resistors?? I don't know that how much current a resistors can draw without any circuit issue. Readymate solution for ...
- 75
1
vote
4
answers
565
views
The effect of combined resistors?
I need to convert 5v to 3.3v, easy. I need an 2k resistor though so i looked if two 1k resistors could achieve the same effect. I found pretty contradictory information on the subject though, could ...
- 83
0
votes
1
answer
82
views
Making a voltage drop while providing high current - how does this work?
I have a USB power source at 5V which needs to power a chip at ideally 4V (4.4V max) - but I need to be able to supply 2A of current for the "spike" current draws for the chip. In general the chip ...
- 13
0
votes
2
answers
142
views
Measure resistance of multiple unknown resistors with single analog pin
I'm currently using the circuit below the measure the resistance of multiple resistors (R1 and R2) using a voltage divider with a known resistance (R1). I'm using a PNP transistor for every unknown ...
1
vote
0
answers
1k
views
How to make a open-circuit cable fault detector?
There are projects like this one over here: Underground Cable Fault Distance Finder, which checks if a given line is short-ciruited with any of the other lines. The location of the fault is also ...
- 187
0
votes
0
answers
637
views
Common Source JFET amplifier input voltage
I want to compare to different formulas which stand for same parameter/value.
Here is common source JFET amplifier circuit schematic:
Here is the first formula which should apply in general to all ...
- 2,432
0
votes
1
answer
405
views
Voltage divider with ADC
simulate this circuit – Schematic created using CircuitLab
I am a newbie and this may not be a tough one. I am using Arduino UNO and trying to find the unknown resistance with the above ...
- 1
0
votes
1
answer
2k
views
How to calculate the induced voltage?
From the given diagram:
Conductor(C) is the only movable part with given velocity (v), connected to a stationary terminals(top & bottom) and an exterior circuit with a load.
Will current flow to ...
- 497
3
votes
2
answers
1k
views
Cermet potentiometer temperature coefficients
I'm engineering a system that is temperature-sensitive, between ~-10-30C. I've moved to using cermet potentiometers because of their sub-200PPM/C temperature coefficients.
If I wire such a pot with ...
- 3,229
2
votes
3
answers
2k
views
Voltage Divider, increasing resistor value for solar tracker
I am working on a solar tracking device based on arduino and I am using LDR's (Light Dependent Resistors) as voltage dividers.
The wiring is similar to this:
The problem I am facing is that the ...
- 181
1
vote
2
answers
2k
views
Working out current, voltage and resistance in a Bridge circuit?
This community is so helpful, my thanks go out to any comment I got with helpful advice.
Here's another homework problem.
I've tried working most of it out, but I have a feeling that I'll have to ...
- 237
-1
votes
3
answers
11k
views
The purpose of voltage-dividers in op-amp feedback?
simulate this circuit – Schematic created using CircuitLab
So, here we have a typical op-amp with negative feedback. The non-inverting input is at virtual-ground, and if the input is higher or ...
- 717