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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2answers
6k views

Understanding a Single Transistor Flyback Transformer Driver?

I've been watching a few analyses of CRT flyback transformer drivers and can't understand why the transistor would shut off. To my naive perspective, it appears that the transistor should never shut ...
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1answer
237 views

MOSFET gate driver used without series capacitor

I'm planning on using this drivers I bought MD1213 to drive BUK7M45-40E MOSFETs and achieve fast PWM switching. Yet the drivers datasheet states the outputs are "Intended to drive the gate of an ...
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2answers
236 views

How to create a ±20v line driver

A design I am working on requires a ±20v differential line driver, but I can't seem to find such a component. The highest voltage line drivers seem to be RS-485, which aren't high enough. Fully ...
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1answer
2k views

MOSFET DRIVER- HIGH side vs LOW side

I am trying to understand mosfet drivers in general, no specific part. And I am encountering low side and high side drivers. My question is that if for example: I have a N channel mosfet as a high ...
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0answers
136 views

Gate Driver Not Working as Expected. Why?

I am using the ADuM5230 gate driver to drive an N-channel MOSFET in a basic buck converter circuit that will convert a 12V DC input to a 5V DC output. The buck converter will operate at a 10kHz ...
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2answers
1k views

Driving a 12V motor with brushed ESC

For my project, I have a winch motor that takes 12V. I have a 12V battery to power it. I want to be able to set up a remote control system consisting of a receiver, transmitter, and one of those ...
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1answer
254 views

High-side gate driver not working under load high current

I have been trying to implement a current limiting circuit using a high power NMOS and high side gate driver. My idea is to adjust the PWM duty-cycle of the gate driver to give an limited (average) ...
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1answer
69 views

LM3414hv Dim input pulled high when leaved open

I am new in this forum . I had an issue with my newly designed PCB where I use LM3414hv as a constant current driver for led strings. Everything works perfectly except for one thing. When I turn of ...
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1answer
61 views

Stepper motor works as expected high rpm but not low

I'm working on a project where I will drive two 12V 0.4A bipolar stepper motors. I am using an adafruit ESP8266 HUZZAH, two L293D stepper motor drivers and a SN74HC NAND gate. I am supplying the motor ...
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1answer
209 views

I'm trying to pick a stepper motor and motor driver. Are these compatible? (TMC2130 & ROB-13656‎)

I'm using stepper motor for an application that requires the motor to be extremely silent. (not 3D printing) So I found out that the TMC2130 driver (or TMC2100) does just that. In my research of specs ...
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1answer
93 views

what led driver do you will prefer?

I was discussing with a co-worker about a led driver for our project, something that is really simple and it could be irrelevant, but it now has a major relevance from my point of view for: for a huge ...
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1answer
179 views

Purpose of PNP transistor in ultrasonic driver circuit

This question is related to my other question What is the purpose of Q2, R2, C1 and C6 in the circuit in the original question? When I remove these components from the simulation nothing appears to ...
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1answer
698 views

SPICE modelling output/input coupling in ultrasonic transducer driver

The real device is this. The LT SPICE model is here. The schematic of the driver part of the circuitry (omitting power supply circuitry and relay circuitry that basically switches the driver between ...
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4answers
14k views

How to convert a digital signal from 5V to 24V?

I have an industrial application where I have to interface a microcontroller output which gives a digital signal (0V to 5V) on its outputs and I want this signal to control a relay which takes (0V to ...
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1answer
207 views

tps61165 input capacitor

I'm considering using a tps61165 led driver for an LCD backlight. While I know it is far from recommended, I quickly breadboarded the typical application circuit using TH components that match the ...
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0answers
86 views

SDI 12 interface

I have a sensor that use SDI-12 communication. I want to connect it to a a µC. I'm looking for something like RS232 <-> SDI-12. Or USB <-> SDI-12 the only schematics I've found use buffer. Do ...
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2answers
58 views

Reading Specs on Motor Drivers

I am looking at a couple motor drivers for a robot I am working on, but I have run into the issue of not really understanding spec sheets and knowing what specs I need to look out for to make ...
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1answer
85 views

current throughout a circuit

this is my first electronics project. I'm using a microcontroller (Adafruit ESP8266 Huzzah) connected to an IR sensor and two L293D stepper motor drivers which are connected to two Nema 17 stepper ...
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0answers
63 views

Running following circuit in under 18mA and 15-20V.

So i build above circuit to drive a high frequency transformer that have Primary 10 Turns, Feedback 8 Turns, and Secondary winding of 1350 turns.It works great for my application with 7V input and ...
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4answers
231 views

Sixty INDIVIDUALLY on/off switchable COB LEDs connected in parallel: how to drive?

For an atmospheric custom ambient lighting project, consisting of 60 individually on/off switchable COB LED's, each rated 2 Watts, 12~14V, max 200mA, all connected in PARALLEL, i'm looking to solve ...
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1answer
583 views

How to use MOSFET as a switch to drive LEDs

LEDs used : 150 mA, Vf = 3.1 V I need to control 3 LEDS using a microcontroller signal with MOSFET acting as a switch. I am having trouble selecting the MOSFET and deriving the gate current. The ...
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2answers
208 views

Not enough pins on my micro controller? [duplicate]

this is my first electronics project that i am doing so my understanding is pretty basic. I am using an ESP8266 connected to a L293D motor driver to power a bipolar stepper motor. The issue I am ...
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1answer
297 views

Basic circuit voltage question - Using a driver to control a stepper motor

I'm pretty new to electronics. I'm using an Adafruit ESP8266 microcontroller connected to a L293D motor driver to power a bipolar stepper motor. I'm struggling to understand the various voltage levels ...
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1answer
224 views

IRFZ44N is not working properly.its Vgs <1v. So how to make it completely on

The driver i have used is IRS2110.
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3answers
505 views

Micropuck LED driver gets really hot

I have a Cree LuxDrive LED powered by a 3.7V 750mAh LiPo Battery hooked up in a circuit with a latching switch. For some reason every time I turned it on, the driver gets really hot and almost starts ...
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1answer
121 views

Searching for root cause of TC4422A failure

I'm working with a device which employs the Microchip TC4422A to drive a series LCR load in the low kHz range, PWM, 50% DC. The device actually has several of these driver circuits, for several loads, ...
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2answers
475 views

Driving a 6V relay from an 3.3v GIO pin of Raspberry PI3 [duplicate]

I want to drive this 6v relay (RT314F06) from a 3.3v output gate of an GIO pin of a R-PI3. --edit-- There is already this answer on SO, but it is incomplete in the way that it does not tell which ...
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2answers
2k views

Is it a good idea to connect a line buffer to ground?

Got a quick question. I'm dealing with 74VHC125BQ,115 and I won't be using one of the line drivers; the rest are connected to UART. So, I'm wondering what I should do with the last one. Is it a good ...
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2answers
105 views

Solenoid driver heating issue [closed]

This is regarding an automotive transmission control module(TCM) solenoid driver. The schematic diagram of the driver is very similar to the below image. Only difference is the TCM has the low side ...
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2answers
1k views

Is this circuit linear or not?

I designed a current source circuit for driving LEDs. This circuit works fine and supplies constant 2.5A. I wonder if this circuit is linear or not. simulate this circuit – Schematic created ...
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1answer
65 views

Powerful driver circuit for small power stepper motor

i want to drive a small stepper motor, let's say nema 17 ( which is usually below 10 W ) with a big driver circuit that can run motors above 20 W.Can i use that driver and maintaining for a long ...
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2answers
75 views

LM3466 current limit - per parallel string or for the current source

Is the current limit on the TI LM3466 per parallel string of diodes or is this the maximum for the current source?
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1answer
179 views

I/O pin driving PCB? Problem, Bug, Feature?

I built an PCB board housing a couple of ICs and the PCB communicates with a PC over USB with a Saxo board (contains FX2 USB controller and Cyclone FPGA). The Saxo board sits on my PCB as daugther ...
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2answers
104 views

running 6A dc motor with 15A

I intend run a 6V Dc motor with a 7.4A current rating using a motor driver with an output current of 15Amax. I am told that the motor will utilize the current it requires so it wont be a problem. Do ...
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1answer
1k views

Problem with BLDC motor drive using PWM

We are trying to speed control a BLDC 48V 500W hub motor using hall sensors. We are using IRF540N MOSFETs with IR2112 gate drivers and Arduino as MCU. We implemented the 3 phase inverter and in ...
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2answers
382 views

Problem testing a DC Motor Controller

I want to build a robotic arm for a project, but I got stuck while testing the motor driver on the breadboard. I have followed the instructions from this instructable: https://www.instructables.com/...
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1answer
93 views

Help selecting a Mosfet/driver for 300vdc 3amp continuous on Arduino [closed]

The title spells it out mostly. Actual voltage will be from 15-240vdc max, load will be 1-3amp max, the mosfet will connect a resistive load. The circuit may be on for 10-30 hours at a time, 6-8 times ...
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2answers
508 views

Resonant Solenoid Drivers

Over the years I have always wondered why we do not make more use of resonance when driving things like solenoids and relays. We all use the circuit below ad-infinitum and just tolerate the current ...
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1answer
3k views

Problems in design of a BLDC motor driver

I have been building a driver circuit for a RS2205 BLDC motor and have gotten decent results so far using back EMF feedback for commutation control. The motor is driven by a PWM wave from a Arduino ...
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1answer
408 views

MHz gate switching: choosing BJTs

I'm trying to build a discrete driver to switch a power transistor (Qg=12nC, Vg=0->6V). I want to push the limits to see what is possible with discrete components (so no driver IC) so I'd like it to ...
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2answers
2k views

Some trouble for drive a MOSFET(IRF540N) with driver(TC4427) (overheating)

I have some trouble about my MOSFET and its driver. I wanna operate my circuit around 4-5 Amps peak. For this purpose I drive two IRF540N MOSFETs parallel with one TC4427 driver by 62.5kHz PWM. But my ...
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2answers
592 views

Driving an LED from an 1.8V GPIO pin that defaults to “IN”

I have an EspressoBIN board, which has 1.8V GPIO pins with a max current of 8mA. I'm attempting to drive some status LEDs from them, and a 5V fan, so I'm using 2N2222s with 220 Ohm base resistors ...
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1answer
156 views

Led Matrix Driving Method

I am currently working on a led matrix display project. It is not prebuilt and it will be built it using individual leds. The size is 16x16. I have been searching about on how to drive the display ...
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1answer
1k views

I need help controlling the 'sled' motor of a CD-ROM, based off of a datasheet

I have a CD-ROM that I would like to use the stepper motor from. I specifically would like to use the existing driver for it. The circuit diagram for this driver, the BD7907FS, is below. I understand ...
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1answer
916 views

Driving a flyback with pure AC sine wave

I am quite confused about flyback drivers. I have a high frequency (up to 50 kHz) AC sine wave generator, and I would like to use it to generate some arcs on a flyback. So I thought I could just wind ...
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3answers
2k views

Using differential line drivers for digital signals

I need to send a slow (steady state most of the time) TTL signals over 10m - 1km (max) distance. Shielded CAT6 wire will be used and I can't use radio based solutions. Wire is only used for that ...
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2answers
1k views

NMEA via RS232 and PPS (TTL) splitter

I have GNSS device that outputs NMEA messages via RS232 PPS signal via a digital out (TTL) I need to distribute both the RS232 and the PPS signal to more than 1 system (currently 3, but could be ...
2
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1answer
243 views

50kW 60Hz 246V Inverter

I am needing to get a 50kW inverter set up for a house, but don't want to sell my kidneys to make it happen. Please tolerate the absurdity of this request before you dismiss it. Back in the day, I ...
2
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1answer
118 views

Question regarding LM5113 Driver

I have a few doubts regarding the driver LM5113 (and IC's in general at this point). As can be seen in the schematic below, VDD is provided with 5.1V via the Zener Diode. I was told (with no further ...
2
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1answer
153 views

DC motor characteristics and control

I don't have a lot of experience into detailed / calculated selection of DC motors based on their specs. Now, I'm starting to do it for robotics competitions as I'm progressing to more serious ones. ...

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