Questions tagged [resistors]
A resistor obeys Ohm's law (\$\small V=I\cdot R\$); the current through it is equal to the voltage across it divided by the resistance (equivalently \$I=\frac{V}{R}\$).
4,709 questions
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"Resistor cube" - what is the basic approach?
This is a puzzle I am curious about, coming from outside my background. I found it here.
The figure below apparently is a "resistor cube" scenario, which I don't quite get how to solve. I'm ...
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Identification of blown R36 resistor value that is connected to a Common Cathode Diode that works with Switching Transistor
Hoping to identify blown R36 resistor value that is connected to a Common Cathode Diode D3 that works with Switching Transistor Q6.
Here is what I know:
For Sonos Sub Gen 2
120V in -> 52V high-...
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CAN Bus Termination Placement
I am in a situation where I cannot remove the termination resistors of two sensors, since I cannot get access to the PCB. With the way my system is setup, The two termination resistors will end up in ...
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How to calculate gate resistor value for IRF540N using DRV8300 gate driver
I am using a DRV8300 gate driver supplied with 12 V to drive six IRF540N MOSFETs in a 3-phase full-bridge inverter. Each MOSFET has its own series gate resistor.
I want to calculate and document the ...
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PFC MOSFET and Current Sense Resistors Failing After Startup
I have designed a 24 V / 10 A SMPS with an active PFC and LLC stage. When I apply the AC input supply, the circuit powers up normally, but after 5–10 seconds the following failures occur:
The PFC ...
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What kind of electronics (resistor, etc) can reliably get really, really, really, hot?
I want something that goes above 100°C and reusable. I want something I can 'simulate' a very high temperature on over and over again.
I don't want just something that can withstand high temperatures, ...
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Making bandpass filter question
From here
Im making a bandpass filter such that
I want to make band pass range 40 to 400Hz such that at 40 and 400Hz value is -3dB. what centre freq and what values I should take for res,cap and etc. ...
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What do NC resistors/capacitors and 0 ohm resistors mean in a schematic?
I’m trying to make my own custom copy/replica of an ESP32 S3 dev board but I am confused about a couple things in the schematics. Here is the link to the schematics by the way:
Schematics Link (PDF)
...
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Which 200 ohm resistor to use in replacing a burnt one?
The burnt out resistor is on the right. I have two resistors to the left of a different style, however they are 200 ohm resistors. Which one should I use as comparative in size to the burnt one?
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Darlington / Sziklai pair shunting resistor value
I'm trying to select an optimal emitter-base shunting resistor for a Sziklai pair (as far as I understand, a Darlington would have similar math), so I can achieve the highest possible transconductance ...
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Effective resistance of a finite grid of resistor
I have computed the equivalent resistance between two opposite vertices of a square grid of resistor using just the rule for series/parallel. I found many discussions on these, but cannot find a ...
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How to size/calculate a resistor network where I can change the gain by 1dB with each switched in resistor? [closed]
I want to create a resistor network, where the gain changes by 1 dB per switching in each resistor
See picture. Switches are all the same size.
How would I size these resistor values so that the gain ...
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Can a stone resistor with low values withstand 240 A pulsed current (1 Hz, 200 μs, 24 V)?
Pretty much as in the caption. I'm building a high pulse current system for a PHD project, using the capacitor bank discharge method to get the current I want. The main problem right now is a resistor ...
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Why does a voltage divider work even with extreme resistor values?
I’m having trouble understanding voltage dividers. According to the standard formula:
$$
V_{out} = V_{in} \cdot \frac{R_2}{R_1 + R_2}
$$
If the two resistors, \$R_{1} = R_{2}\$, are equal in value ...
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Non-linearity in presumably "linear" resistors
Summary. While investigating loudspeakers non-linearity, I found non-linear effects in the 0.1 Ohm resistors I used as current sensors. It turns out that self-made copper wire and metal film resistors ...
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