All Questions
Tagged with resistance voltage-divider
37
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Parallel/Series Resistors Voltage measurement
I want to know the value of the resistors here. There are three conditions in this picture. Its getting really hard to fulfil the correct resistor values. Thats why i decided to post it here
6
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5
answers
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Non-inverting op-amp
Why is resistor R1 connected to the inverting terminal of the op-amp in a non-inverting op-amp configuration? What will happen if we replace it with a short circuit?
- 99
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4
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Why does voltage reading increase the greater the resistance load?
I'm new to electronics. So basically I already understand Ohm's law and the math behind why this is the case. What I don't get is the idea behind it.
Shouldn't the greater the load resistance be, the ...
user312602
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Calculating the change in output voltage as temperature changes the control feedback resistance
I am trying to calculate the new output voltage when the temperature changes the resistance of the feedback network which sets the output voltage.
I have this circuit using the MCP16311/2 buck ...
- 412
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1
answer
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Old potentiometer as a special voltage divider model
In an Adruino-like project that is built to deal with worn potentiometers (trimmer pots inside thumbstick, of alps alpine type), I am noticing a consistent set of input reading patterns among all old, ...
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2
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696
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Reduce a potentiometer value from 1M to 500K
I have an AC speed controller board and I would like to replace the 500K potentiometer on it with a potentiometer/switch combo to suit my application. However, the potentiometer I have is valued at 1M....
- 103
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2
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244
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Why is there a resistor in this circuit?
Why there is a 220 ohm resistor in this circuit? Can't we just connect the thermistor directly to the base of transistor?
- 1,498
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2
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469
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Voltage divider circuit load resistance?
For a test on circuits that I just completed, a question asked about a voltage divider circuit (see below.)
However, we were told to assume that the load had no resistance and was parallel with the ...
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3
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Voltage drop through a resistor compared to a Zener diode
A variant of this question has been asked a few times, but not received a response. Usually, we get an analogy with water pressure, or gravity, or a version of Ohm's law; not the actual cause-effect ...
- 197
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1
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243
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Multiple voltage dividers : finding resistances in a circuit
I have to set the battery voltage to 14.5V from the first divider, then from that I have to attenuate it to 1V to feed to the input of an op amp. Now this answer is inspiring but doesn't solve my ...
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2
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352
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Voltage divider for a voltage range spanning negative voltages
We have a sensor giving out a signal between -10 V and +10 V, and a signal acqusition device that only accepts voltages between -2 V and +2 V. So we need to scale down the signal into the smaller ...
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2
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Very high resistance
I'm playing around with a very simple setup:
9V battery
light diode
voltage divider (R1 - three 1 kOhm resistors, R2 - one 1 kOhm resistor), which should give me roughly 3V for the diode
The first ...
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2
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Calculate op-amp input voltage with potential divider and series resistor
I have managed to confuse myself when it comes to calculating the voltage drop over a series resistor connected to a potential divider (See below):
The op amp non-inverting input is connected to a ...
- 99
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2
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243
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Is the voltage divider in this circuit backwards for what I'm attempting to achieve?
This circuit is from another post (from long ago) where a user helped me build a circuit which would use a BJT as a switch.
simulate this circuit – Schematic created using CircuitLab
The ...
- 1,272
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1
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Advice on a voltage measuring circuit
I've been working on a voltage divider circuit that will hopefully allow me to measure voltages between 0-60 kV DC (80 W) as 0-889 volts DC.
The voltage divider section that is used to measure the ...
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