Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [driver]

A chip or a circuit that sends a signal with more current or voltage, or over longer distances.

946 questions
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Why would one drive LEDs with a common emitter?

I've seen tutorials aimed at beginners suggest the way to drive an LED from something without enough current drive is this: (option A) but why not this: (option B) Option B seems to have some advantages over option A: fewer components the…
Phil Frost
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Why are USB devices slower than 480 MBit/s

Motivation With a signaling rate of 480 MBit/s USB 2.0 devices should be able to transmit data with up to 60 MB/s. However today's devices seem to be limited to 30-42 MB/s while reading [Wiki:USB]. That is a 30 percent overhead. USB 2.0 has been a…
Chris
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How to drive brushless motor with Arduino?

Is it possible to drive a brushless motor directly with Arduino? Or should I revert on controlling a brushless motor ESC with PWM pulses?
tuupola
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What is the purpose of "MOSFET driver" ICs

There are dedicated "MOSFET driver" ICs available (ICL7667, Max622/626, TD340, IXD*404.) Some also control IGBTs. What is the practical purpose of these? Is it all about maximizing the switching speed (driving gate capacitance) or are there other…
XTL
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Are there resources for learning to write drivers?

I have a decent amount of experience designing hardware and embedded systems in general, but I have never written a driver for an operating system. I would like to know if there are any good guides, preferably online, although good books would…
Kortuk
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How diodes protect H-bridge DC motor driver?

I don't really understand how these diodes in this circuit and similar circuits (like driving a relay circuit) protects the controller circuit from the energy stored by the inductance of the coil. I really appreciate if someone could graphically…
Mehrdad Kamelzadeh
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Is it possible to drive a stepper motor greater than 1000 rpm?

How could I achieve this? What are the stepper motor facts and principless that I have to keep in mind to design a circuit to achive this goal? Are there any readymade/open source alternatives and circuits available to achieve this task? Do I…
Kevin Boyd
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Severe ringing when high side MOSFET in half bridge circuit switches on

I have designed a PCB (intended as a prototyping building block) that has a IR2113 high and low side gate driver driving two IRF3205 (55V, 8mΩ, 110A) power MOSFETs in half-bridge configuration: Picture of the physical setup Upon testing the…
jms
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How to drive 1080p with only 540 pins?

I was trying to hack a 3-D system starting from the monitor: VG248QE. I teared it down to LCD matrix and driver. This is a 1080p(1920 x 1080) monitor so I was expecting that at least 1080(row) + 1920(columnn) = 2000 pins wired from the LCD driver to…
Alper91
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When to NOT use Totem Pole Drivers?

When is it inappropriate to use a totem pole driver while designing a circuit? Ie. Never use totem pole drivers when... or Totem pole drivers are never used for...
rrazd
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Help wanted with vacuum fluorescent display (VFD)

In a box with old components I found a 16 character, 19-segment Futaba VFD: I would like to use it for "something" but I haven't the foggiest how to drive such a display. Even the filament is an unknown factor to me. The device dates at least from…
stevenvh
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What is MOSFET gate drive capability and why do I care about it?

Someone told me that this circuit has "poor gate drive capability": simulate this circuit – Schematic created using CircuitLab What exactly does that mean? I tested it with an LED as a load for M1, and the microcontroller is able to turn it on and…
Phil Frost
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Driving 50W-250W ultrasonic transducers with sine: Any Class B 135KHz monolithic power amp ICs?

My project needs to drive a medium power ultrasonic piezoelectric transducer from a sine wave (/ sawtooth) sweep generator that sweeps +/- 2% of the transducer resonant frequency. The question: What are my simplest options for driving these…
Anindo Ghosh
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Voltage spikes when driving DC motor with N-channel MOSFET

I'm trying to drive a DC motor (12V, 100W) with MOSFET IRFP054N. PWM frequency is 25 kHz. Here's the schematic: I know DSEI120-12A is not the best diode for this but I don't have any better right now. 3A Schottky diodes, which I also tried, get hot…
Simon G.
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Possible causes for 7-segment LED flicker

I'm working with a vendor overseas to revamp an existing product. We're trying to keep cost down. Currently the product consists of: 4 large buttons 4 double digit 7-segment LEDs. (each button has double digit underneath it) 1 LCD (8…
milesmeow
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