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

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24 views

Peltier temperature control using DRV8840 [on hold]

I am planning to have Peltier temp control using PWM control of H Bridge. Peltier rating: 12V, 3A I have come across DRV8840 with fClk max = 50 kHz and max peak current = 5A Is this suitable for my ...
3
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1answer
45 views

Motor driver and overvoltage spikes

I'm currently working on a simple driver for a DC motor, only one rotating direction with PWM control. For information, PWM frequency is 1kHz. I have some problems with overvoltage at the terminals ...
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1answer
77 views

present with me a “ic” for only produce dead time for IGBT gate driver [closed]

i need to "ic" only for produce dead time with been 2 pulses. i need dead time=={4-5 micro second}
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1answer
46 views

Stepper motors: feedback to detect successful step?

Is it possible to have a stepper motor driver circuit detect if the motor has successfully stepped, ie not stalled, or stepped too quickly? (Not microstepping).
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1answer
55 views

USB Full-Speed driver's effect on transfer speed

I am experiencing problems with USB communications which seems driver related. My setup involves an embedded device set up as a virtual com port (CDC/ACM) with which I communicate over USB. The ...
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2answers
68 views

What does a motor driver do?

EDIT: I understand now, but with a microcontroller, why can't I just connect the data pin of the microcontroller to the data pin on the servo and the power form a battery bank to the power on the ...
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1answer
54 views

LED driver circuit with both analog and pwm control

I would like to design an LED driver circuit that allows for simultaneous analog and pwm control. That is, I would like to set the the LED current using an analog signal and then be able to switch ...
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2answers
60 views

Can I drive a stepper motor with a regular MCU?

If we just focus on the signals and not the power, will an ordinary MCU like any of the ubiquitous Atmel 32-bit controllers be sufficient to drive a step motor? What are the benefits of prepackaged ...
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1answer
99 views

How do you drive a stepper motor with an L9110 driver module? [closed]

I have a dual channel motor driver module based on two L9110 H-bridges: The documentation and many, many tutorials on the internet mention that this can be used to drive two DC motors, or a signle ...
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31 views

Can an IGBT overcurrent damage the driver?

We are using an hex IGBT module (datasheet: http://www.microsemi.com/document-portal/doc_view/7751-aptgt150ta60pg-rev2-pdf) which is driven by two separate IGBT drivers, the 2SC0108T2D0-07 (datasheet ...
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1answer
45 views

How can I create a circuit to poer up pc each 24 hours?

I can't find idea or schematic for this in google, maybe certainly I search with the wrong terms, but I need plug on the pc to turn pc two times each 24 hours. I found the circuit with 555 timer, ...
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0answers
77 views

Mosfet rail to rail discrete level converter gate drive

I've been trying to work out how to implement a fairly simple gate driver from discrete mosfets, probably similar to a basic comparator with push pull outputs. The purpose is to drive the gate of a ...
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1answer
36 views

Direct Torque Control of Induction Motor (DTC)

I was working on a project on how to design a classical Direct Torque Control drive DTC but there is a ceratin point that i can't understand. How can we calculate the Reference values of the torque ...
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2answers
132 views

I want to design over voltage cut off circuit using mosfet [closed]

I am trying to design a LED driver (flyback topology) of 40W (50V and 800mA) with nominal input voltage 230V. I need over voltage cut off circuit on input side , i don't want to use ready-made SSR , ...
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2answers
46 views

Drive a capacitance load with a very large output resistance analog voltage source

I have a signal source with a very high output resistance. The output of this source is connected to the input of comparator. Actually the input capacitance of comparator is not large (about 20fF). ...
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2answers
105 views

Why can a 74HC595 drive 8 LEDs?

I don't understand, I have seen many people use the 74HC595 to drive 5V across 8 5mm green LEDs via 220Ohm resistors at the same time, whereas the datasheet says that the maximum Vcc current is 70mA. ...
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1answer
80 views

High currents LED switcher circiut for WS2811?

I am making one High Amp for WS2811 RGB LED driver in range 2 Amp, SO base on it's Datasheet the driver working by this way: there are some switcher circuit similar to this : But this kind of ...
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1answer
36 views

specific driver and motor combination

I am planning to make a 3D printer for a school project and would be grateful for your help. I want to combine the following driver [L298N Dual H Bridge DC Motor Driver IC; Driven part of the terminal ...
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1answer
91 views

Push-pull configuration over single mosfet

I'm dealing with a simple application in which I need to drive a pure resistive load and to control it by voltage. I control the load through a pwm signal coming from a microcontroller in 5V logic. ...
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0answers
36 views

LED pulses with constant current driver

I am trying to drive two Nichia LEDs, the NC4W rated at 13.6V/1A. My supply is either a pack of 4 18650 cells in series (16V) or a DC DC boost converter rated at least at 100W. I tried a couple of ...
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0answers
23 views

drv8833 motor driver with lipo-2s problem

I am using a drv8833 motor driver for brush motor and i have one problem. When i'm connecting its VIN and GND to powerbank battery, brush motor to BOUT12 and BIN12 to atmega 328p, setting BIN1 to '1' ...
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0answers
27 views

Problems when dimming triac with load have large capactive

I'm make a circuit to dimmer a led light bulb base on zero point crossing detect. But I have a problem with load, the led light bulb using RC type power supply to drive a string of led series. I think ...
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2answers
120 views

mosfet driver uln2003

simulate this circuit – Schematic created using CircuitLab hi, in the above circuit, why wont the motor run? connecting the motor - to Drain of the mosfet and the motor starts spinning. and ...
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2answers
181 views

Can I drive stepper motor with AC voltage? [closed]

I want to buy this motor SANYO DENKI 103H7823-1741 for building my CNC I have found the datasheet over here in the website that I will buy it from it says Motor: AC; stepper; 100VAC; step 1,8°; 2....
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1answer
69 views

What is an acceptable temperature rise for a Mosfet?

I will be using driving N-channel Mosfets with 5v PWM to switch 24v 2A(per channel) LED strips. I will use four per strip (RGBW) and have 6 strips, totalling 24 Mosfets on the PCB. I am looking at ...
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1answer
84 views

What is the type of this legacy motor and how is it supposed to be controlled?

A friend of mine is going to give me an old Dayton 8F047 which I would like to recycle, but it is now obsolete and I cannot find anything other than a schematic which is reproduced below. ...
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46 views

Half bridge mosfet drivers

Hello I'm trying to make a DC-DC converter and I need to drive 2 mosfets using the folowing half bridge driver : http://docs-europe.electrocomponents.com/webdocs/0b3c/0900766b80b3c1b2.pdf Mosfet : ...
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1answer
100 views

Calculate Current Regulation - DRV8825

I am driving a bipolar hybrid stepper motor rated 1A with a DRV8825 at 12 V. About current regulation the datasheet says: 9.2.2.2 Current Regulation In a stepper motor, the set full-scale ...
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2answers
76 views

How to control a capacitive load using an Arduino Uno

I'm trying to control a liquid lens using an Arduino Uno, however, the lens driver I've been attempting to get hold of is no longer an option. The lens needs up to 60Vrms in order to function, and ...
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1answer
78 views

Stepper motor going one step forward and one backward

I have DRV8825 driver wired like that: And I'm sending high and low signal in loop. Each 2 high signals motor moves one step. And it moves forward then next step backward. Yes, I've tried to switch ...
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1answer
73 views

No HO pulse on IR2184 in half h-bridge

I am unable to get any output on HO pin of IR2184 high side gate driver when I tried to drive a half H bridge. Vcc is around 12-15V, input to IC is around 8V square wave, bootstrap capacitor voltage ...
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1answer
75 views

How to switch micro DC motors fast?

i'm planning to make micro/nano quadcopter and ive bought all major components so far. Only thing that i cant figure out are motor drivers. I was planning to use some kind of transistor to do that for ...
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4answers
307 views

10 Watt LED and LED Driver related question

I got a 10watt LED from Ebay but never thought that the driver and heat sinks are must-haves for this little master. When googled, I found several circuits of LED driver. But none of them are ...
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2answers
78 views

Unidirectional motor control

I am interested in controlling the speed of multiple small DC motors that will draw at most 1 amp each. I only need to run them in one direction, so an H-bridge IC like the SN54410 seems like the ...
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1answer
190 views

Ramps 1.4 stepper motor Slaving

So I am looking to run 2 stepper motors for x and y axis with a ramps 1.4 board, but since their are only one stepper motor driver per axis i was wondering how to accomplish this? (I'm thinking a ...
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1answer
59 views

Choosing Stepper Motor - Driver Combination

This is my first attempt at designing/building my own circuit and PCB, so please bear with me. I am building a small, portable device that makes use of a small, accurate motor. My goal is to make the ...
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2answers
221 views

Pull up on output pin of Buffer SN74HCT245

I am using SN74HCT245 Buffer operating on VCC=3.3V. So, I am getting 3.3V at each output pin of buffer (B1 to B8). But if I want to drive a load with 5V input, what options are available to me by ...
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1answer
138 views

what is this error in PSPICE with IR2113 [closed]

I want drive a buck converter with bootstrap technique. but this circuit does not work!
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1answer
102 views

How to convert Clock signal to PWM signal?

Let's say i have a clock signal which i control its frequency making it going from 10Hz to 1000Hz. And i want to convert this to PWM signal, so that 10Hz gives 0% duty cycle and 1000Hz gives 100% ...
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1answer
136 views

H-Bridge driver circuit design

I have built the following H-bridge driver circuit (The red resistors R9 and R10 were not included). However during testing I have found that I am constantly blowing the high side P-Channel MOSFETS ...
3
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1answer
51 views

how does this differential ddr receiver work?

I'm looking at this simple schematic trying to understand how a DDR SSTL receiver works (the one on the left). I get that the input voltage will be compared to Vref and the output will be a ...
1
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2answers
167 views

Which method is better for liquid crystal overdriving?

Recently, I started to design a LC (Liquid Crystal) shutter glass. The question is which component should I use. This is the LC shutter I might use: PolarSpeed®-S However, there are a few more ...
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0answers
57 views

When do you use a brushless motor driver and when do you use an ESC?

I'm trying to build a drone from scratch on my ARM microntroller on a Tiva C series development board. I know you need a motor driver(controller) to control a motor, but in the case of a brushless ...
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1answer
50 views

Two-terminal Connection High-Side MOSFET driver

So I'm trying to make a discrete device that functions the same as the highlighted portion of the diagram, which is taken from a Battery Management System chip. I understand that n-type FETs are ...
1
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1answer
48 views

Multi-plex 8 BLDC motors using shift registers?

I want to drive 8 tiny diskmotors - they look like low current motors. robotshop 2mm vibrating disks I want to drive perhaps 2 or three of them at a time with pulse-width modulation signals and I ...
0
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1answer
33 views

LED Driver LM3410X not functioning

I am testing below LED Driver Circuitry on breadboard using LM3410X. Input Specs: Vin & DMM = 5V, L = 20 uH R=2 Ohm Only thing is I have'nt connected LED ( I am testing with 10k resistor as ...
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1answer
147 views

Is it possible to sink and source from one output pin using a darlington driver

Sinking and sourcing with a darlington driver I asked a question about sinking and sourcing LEDs while using a darlington driver. The images were slightly unclear so i have redrawn it. I had too many ...
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0answers
60 views

Sinking and sourcing with a darlington driver

I was making my circuit with around 60 LEDs with a microcontroller when i realised that i didn't have enough voltage for all the LEDs. I am going to add a darlington driver on another board, so the ...
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1answer
80 views

Interfacing thousands of RGB LEDs in a matrix

So I have 3072 RGB LEDs I need to connect in a matrix. I have decided to split the project into smaller matrices and all LEDs are common Anode. Datasheet for LEDs is here: http://docs-europe....
15
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2answers
2k views

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(...