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Questions tagged [driver]

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

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1answer
30 views

How to determine PWM Frequency of a MOSFET to drive a BLDC motor?

What are the factors determining the PWM Frequency of the MOSFET driver circuit that drives a BLDC motor. Is there any equation for PWM calculation? For eg. I need to control the speed of a BLDC ...
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1answer
58 views

Potentiometer min and max value

I purchased several of these to drive high power LEDs on a custom project : https://www.amazon.com/gp/product/B019W4C5IE/ref=ppx_od_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 These LEDs are to be ...
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2answers
29 views

What is an example of driver and receiver chips for a PCB?

I am watching some tutorials on signal integrity and the instructor keeps referring to a driver and a receiver. I am a little confused what exactly this would be when designing a PCB is the driver ...
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1answer
15 views

Can a power surge have a different effect on a led driver when floating?

I have a LED driver which has 3 connections on the AC side , L,N and ground. In the event of power surge, can there be a difference in effect if the GND connection of the LED driver is floating or ...
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2answers
59 views

Driving a 4-wire Hard Drive Motor

After reading many contradictory accounts of the "proper" method, I would like to clear it up: what is the correct method for driving a 4-wire, star configuration hard drive motor? What I have ...
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1answer
86 views

Driving MOSFET with 5V PWM for 12V fan speed control

I came up with this circuit to control a 12V 6A fan's speed, with a 5V PWM from another circuit. I'm not sure if it's going to work (I'm not very experienced nor knowledgeable in electronics) and I ...
2
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1answer
389 views

Why does turning a MOSFET ON too fast cause ringing?

Going though app notes, I can understand that turning it off (i.e. when drain-source voltage is increasing) can cause ringing due to parasitic NPN and also drain-gate capacitor which can charge the ...
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0answers
32 views

Not All I/O Pins Work for Nixie Driver on Arduino MEGA and ATMEGA1284PU

I am tearing my hair out, and help would be immensely appreciated. I am developing a nixie RPN calculator. I am using nixies being driven by K155ID1 nixie drivers, connected to an ATMEGA1284PU. I ...
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1answer
47 views

What methods exist to introduce dead-time in a MOSFET H-bridge? [closed]

What methods exist to introduce dead-time in a MOSFET H-bridge? (to prevent shoot-through) (other than software methods, or using MOSFET driver ICs with internal dead-time generators)
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1answer
1k views

Is turning off MOSFET too fast, bad?

As far as i understand turning off a MOSFET too fast, is bad, as high drain-source dv/dt can cause ringing through: a) biasing Parasitic NPN and: b) charging the GS capacitor through DG capacitor, and ...
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1answer
45 views

What's the purpose of diode between high side and low side supply voltage of IR2110?

What's the purpose of the diode between VCC and VB?
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2answers
39 views

Can i use IR2110 for two independent MOSFETs?

Can i use IR2110, and feed it with two independent PWM signals, to drive two independent MOSFETs, each controlling a separate motor? (or high side and low side inputs/outputs of this chip gonna affect ...
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1answer
49 views

Driving MOSFET from MCU with BJT

1- What is the purpose of D1 in this circuit? 2- Can i connect the PWM output of MCU to Vi through a diode, to protect the MCU from 12V supply of the drive circuit? (e.g. if Vi got accidentally ...
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0answers
29 views

L298N motor driver output error

I had worked previously on a project which used a L298N motor driver to control motors.Datasheet Link. I have now completed my project and started with the production phase of it. But while I was ...
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1answer
46 views

Stepper motor - How to choose a driver

I want to know how can I choose stepper driver, once I have decided on the stepper motor that I wish to use. This is how I understand it: If a motor can draw a current of say 0.5 amps and operates on ...
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1answer
31 views

Problems with Stepper Motor & SN754410

I am using a stepper motor for a project, it is the first time I've used one. The internet said it was very simple and easy but that's not true for me. I bought this motor from digikey https://www....
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0answers
29 views

Can I operate my (typical) 8mm Bipolar stepper like a BLDC?

My project involves use of these tiny steppers in an open loop- I'm not yet certain whether I can get away with the torque compromise that microstepping would require but it would be desirable. ...
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0answers
22 views

MC33926 Motor Control Rise Time

I am using a MC33926 motor controller. Unfortunately, I am not extremely familiar with motor controllers and have a question. The circuit below shows the circuit that I am working with. The drivers ...
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1answer
25 views

NTE 4050 buffer and current sourcing capability, datasheet reading woes

I am trying to construct an output that is switched on by the inputs to a buffer. The buffer input, in the final design, will be sourced from an Arduino or Raspberry PI. I needed the buffer because ...
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0answers
37 views

Microchip MRF24WN0MB datasheet for use in STM32

We have designed a board where a Microchip MRF24WN0MB WiFi is connected to an STM32L082 ARM micro-controller through SPI. I can generate code with STM32CubeMX (compiled with Eclipse SW4STM32) and run ...
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2answers
104 views

Bootstrap mosfet driver with ir2101

I am trying to build this circuit but I don't know how to test it. When I am measuring the voltage on the gate of high side mos is almost 12 volt like VCC. So to speak .. the boostrap circuit isn't ...
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1answer
63 views

So, ?nobody? makes a high(er) current tri state driver chip? [closed]

I'm wanting to charlieplex some 100ma LEDs, and I can hardly believe no one makes a higher output tri state driver. I know how to do it with discretes, but Prove me wrong, please.
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1answer
60 views

Difference between driver and transistor

I asked a question earlier question, "Is it safe to run Logic ICs at their maximum output current?" asking if it was safe to run logic ICs at their maximum current. From what I understand, this is ...
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4answers
73 views

Is it safe to run Logic ICs at their maximum output current?

I am building a circuit that will ultimately output to 8 7-segment displays. I am going to be multiplexing these displays. The displays I chose are https://uk.farnell.com/kingbright/cc56-12surkwa/...
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0answers
42 views

Calculating the Duty Cycles for the Syren 10A Motor Driver

I bought the Syren 10A to drive a Peltier element using python and a raspberry-pi zero + 12V power supply. After reading and talking I concluded to use the Driver in the R/C Failsafe Timeout Mode ...
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2answers
144 views

Ohms law and LED driver efficiency? How can this possible be true?

I am having a meltdown with a Chinese supplier at the moment and hope dearly that someone can help. I have an LED driver that is in my mind 28.8W. The output of the driver is 48 V @ 600 mA (48 V x 0....
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2answers
61 views

Attiny45 12V LED Driver

I want a fading effect on a 12V led strip when power is turned on/off. I want to keep it simple and efficient, so I choose an Attiny45. The problem is that for the Attiny to work, I would first need ...
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1answer
26 views

With this MOSFET driver IC, is the output voltage range 0 to Vin or 0 to Vcc?

I am using this driver IC, ZXGD3005E6TA. I am using a Pi as my controller, which has an output of 3.3V. The Vcc of my system is 12V. I cannot determine if the IC will output the 12V when I supply 3....
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2answers
151 views

500 watt LED PWM

I'm trying to make a PWM'd floodlight with 6 Cree CXA 2540Ns. My setup is a simple 555 timer set up for PWM, driving a 3904, which in turn drives an FDA59N30 N-channel MOSFET, properly cooled to ...
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1answer
39 views

Issue with driving Brushless Motor with a MOSFET Driver

So I have been given a circuit which supposedly works. The circuit was the the one shown but with a 10k resistor where the scribbles are. Q17 is an IRLM6344TRPbF N-chanel MOSFET and Q16 is a ...
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2answers
58 views

Trying to split the current output of an LED driver

I am currently using an 8 channel LED driver wher I have set the outputs to produce 20mA of constant current. Problem is I have 11 LEDs to drive. So I have decided to connect two LEDs in paralled to ...
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3answers
163 views

Making an efficient constant current source

I need help making an efficient constant current driver. I want to power my home with LED light strips for lighting and decorative purposes. I need to be able to turn each strip on and off ...
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1answer
26 views

2A Brushed motor driver

I need to power 2 brushed dc motors with 2A each and 3 to 6V, one direction(no bidirectional or break). To the enable the rpi 3.3V pwm, and standard pins(breadboard), not those micro pins. I know the ...
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0answers
35 views

How to use less Bipolar Stepper-Motor Drivers

I make a CNC machine with lot of drivers (12) and the quality ones are quite expensives. As I never use all the motors at the same time, and the fact that the unused/resting motors can be off is not ...
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1answer
50 views

PSU for led fixture

My cousin gave me a LED fixture for which the power supply is no longer working. He threw it away so I cannot look at the specs in the PSU. He says he measured 78v out of the PSU before throwing it ...
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2answers
116 views

How to drive a 1MHz Ultrasound-TD1000KA

I want to measure the Sediment of water. So I chose a 1MHz Ultrasonic Transducer sensor with the ability to work underwater and also can recognize the sediment under water. The output of the sensor ...
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2answers
91 views

7 Segment display driver

I came up with the circuit below to drive a single 7-segment display from an Arduino via a shift register (74LS595). Is the circuit correct/good enough or am I perhaps missing something critical in ...
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2answers
51 views

Connect VGA cooling fan (12vdc - 0.1A) to constant current driver (120Vac to 12- 22vdc @ 0.3A)

I have an AC driven COB LED which can be connected directly to the AC main in house (120v). I would like to attach a cooling fan to the COB which requires 12vdc @ 0.1A. I have a constant current ...
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2answers
66 views

LED Driver Choosing help

Newbie here, I am working on a project with a panel of 12 - 15 LEDs(std 5mm through hole LEDs) in paralell. I am currently using a 5V 1A SMPS. I used 330 Ohm resistors for current limiting. It works ...
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3answers
1k views

Resistors getting hot in this MOSFET driver circuit

I created this circuit as general purpose MOSFET driver circuit for PWM frequency up to 10KHz (usually from microcontrollers): But R3 and R5 are getting hot soon as I connect 5V supply and I did not ...
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0answers
39 views

Bipolar, tristate-able, overvoltage capable, digital output stage?

I need a digital output driver, with 5V TTL input and bipolar output voltages supplied from -10V and +10V rails. It must be able to go to tristate. It must drive about 5mA. In tristate it must survive ...
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1answer
37 views

Stepper motor driver voltage question

Attempting to drive the stepper but noticed that the motor is rated for 3V 2A and both of these boards feature a motor driving voltage of 6-30V or 7-30V Attempting to drive a Wantai 57BYGH420-2 ...
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1answer
33 views

KEM-2542 LED Display Driver

electronics is my hobby. I do many mini projects. Don't know deeply, like create a whole new circuit with a IC datasheet. My problem is, I have a LED Display KEM-2542 (188.8)(3.5) from a old device......
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1answer
23 views

Lower maximum current rating on available motor driver .

I am designing an arduino controlled autonomous bot with 2 DC motors to control. The motors i have to use are 500rpm 12V Johnson DC motors with Torque : 8kgcm and No-load current = 800 mA(Max), Load ...
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0answers
29 views

Controlling GL646USB GPIO pins

I have this USB scanner from my dad that was made back in 2002, that apparently uses an old all-in-one GL646USB chip from Genesys to control the stepper motor, CCD sensor and provide some GPIO pins. ...
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0answers
121 views

Driving a voltage boost circuit with a piezo driver circuit

For a university project, I'm creating my own small speaker. This speaker includes a speaker driver circuit consisting of a transistor and 3 resistors (see figure below). simulate this circuit –...
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1answer
46 views

Safe solenoid driver: can I use a slow blow fuse?

I'm building a device that uses a microcontroller to control 15 solenoids via a preexisting multichannel DC solid state relay board. When all is working as intended, at most one solenoid will be ...
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1answer
175 views

Constant Current Led Driver (non dimmable) to work with PWM

I have 18W lamps that came with non dimmable led drivers. Ive found datasheet for the main chip (ws3441), which included schematics: and internal block scheme of the chip: I'd like to add dimming ...
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0answers
39 views

cost efficient BOM for total 10x12 16 segment (1920 led) display

I've already built a few test prototype for a large(ish) 16-segment display board. I want to use a Arduino of ESP8266 to run it, with external power, and ICs for the Characters. So far, I've been ...
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0answers
23 views

Difference between RGB TN and RGB IPS display?

While I know the pros and cons of each type of screen and how IPS is superior to TN screens in viewing angles and color reproduction I'm trying to understand how these two screens operate differently. ...