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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23 views

Motor driver current sense does not have the same shape as the sensed current (DRV8874 current mirror)

I am using 3x DRV8874 motor drivers to drive the 3 windings of a brushless AC motor (OUT1 of each motor driver to each winding, such that the current sensed by each driver is not a combination of ...
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51 views

Multi “Master ”Coaxial Driver Design

I have an application which requires sending PAL video signal & UART infomation over a 50R coaxial cable without disrupting the PAL protocol while doing it, the total length of the cable is around ...
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29 views

Driver output to FET gate voltage - rise & fall time

I have an ISO driver with the following params: Peak source current = 4 A, Peak sink current = 6 A, Sink resistance = 0.55 ohm, source resistance = 5 ohm. How do I calculate the time between the rise/...
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72 views

Which one would be better for 3.3V outputs among ULN2001 and ULN2003?

I intend on driving 24VDC relays with darlington arrays of the ULN200X series. Since the darlingtons will be driven by a 3.3VDC outputs I am hesitating on whether I should choose ULN2003 or ULN2001. ...
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35 views

DRV8313 Brushless DC motor controller output voltage to motor is zero

I have installed two DRV8313PWP in a custom PCB and I have followed the schematic in the datasheet to control BLDC motors. After researching how to program them, i have concluded that pins EN1, EN2 ...
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1answer
44 views

When using multiple constant current drivers for High Power RGB LEDs, connect Vo- together? [closed]

I'm using a set of three Mean Well HLG-60A-C350AB in order to drive a string of 48 no-name high power RGB LEDs. I chose these drivers because they provide an easy way to regulate the constant between ...
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25 views

Linear actuator is not working with BTS7960

I am trying to run a linear actuator with a BTS7960 motor driver and an Arduino UNO. The code seems fine, wiring seems fine but after uploading the code, the linear actuator does not start. I am using ...
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26 views

Learning PPP for use with LTE modem

I am trying to get a live connection on my mcu using a simcom (7600) modem. In order to get grip on what I am doing, I feel the need to get some general understanding of ppp first. I read through the ...
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50 views

Limiting Power in a Coil

I am currently working on a project to make my own coilgun. But a bit unsure of the driver circuit. Typically, a driver circuit will look something like this: Flyback diode and a mosfet being the ...
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1answer
47 views

Using Circuit of Plasma Globe to Power a Tesla Coil

I had this old plasma globe laying around so I opened it up and found what I think is a ZVS circuit(I have ZERO knowledge of high voltage electronics and I may be wrong). I also have a wound tesla ...
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21 views

DRV8870 motor driver not powering motor

I am fairly new to electronics. I am trying to control a single 1.5V encapsulated vibration motor with the DRV8870 motor driver without much success. The motor is connected to the circuit at CN1 with ...
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49 views

If I supply more current than needed will my electronics fry [duplicate]

If I have a stepper motor and driver that require 5V and 240mA and I supply 5V at 3A will my circuitry die? I have heard the expression that a motor "draws" the current that is needs, but I ...
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47 views

Do I need a higher amperage power supply for more stepper motors

I have a very simple question: I am trying to power five 28BYJ-48 stepper motors attached to some ULN2003 driving boards but I am confused about the amperage I need. Each of the stepper motors needs ...
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43 views

Multiple Big Stepper Motors on Raspberry Pi

I am fairly new to the world of stepper motors, drivers and RPis, so I might have some potentially naive questions. Firstly, I am using two NEMA 34 stepper motors and planning to connect them with ...
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1answer
9 views

Which mode to configure MP24833AGN LED driver when we need output voltage higher than input voltage?

The MP24833AGN is a good choice for an LED driver when we have a DC input of 9 or 12 V (or even higher) and need to drive bright LEDs which consume high current like 1A or more. If your application is ...
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1answer
99 views

Getting a DC value from this driver circuit

I have this driver circuit that I can't change: V1 is always 24 V. V2 can be 3.3 V or 0 V. The output of this driver goes to the board that I'm developing. If V2 is a PWM, would it be possible to get ...
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1answer
82 views

Understanding how TFT driver operates (ILI9486)

I'm trying to understand how to interface TFT driver ILI9486. I'm doing this because I want to control TFT display with PIC microcontroller and not AVR (for which libraries already exist). I own the ...
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1answer
136 views

What does the collector resistor on this LED driver circuit do?

The resistor in question is R2. The below circuit provides roughly constant current above a certain Vcc. For R2, I arrived at the value by trial and error by checking simulation outputs. I would like ...
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2answers
243 views

Is it necessary to use a pull down resistor with this BTS7960?

I have an Arduino Nano controlling a BTS7960 that is 10 meters away. I have one 24V power supply. Both the Arduino and the BTS7960 get 5V through a an LM2596 step down converter. The BTS7960 "...
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2answers
75 views

BSS138 level shifter causing problems

I have encountered a problem that I am unsure how to solve. As shown in the image at the bottom of the question, I have an FPGA (Nexys A7-100T) that generates signal to run a motor connected to a ...
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1answer
60 views

Lazy full-bridge PWM control

I'm playing with a full-bridge driver: Usually, you want to put an inverted PWM signal on IN1 and IN2 and take care of dead-time. While writing the code for MCU I tried a simpler pattern: put a PWM ...
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28 views

Control two DC brushed motors with two wires in common

I'm working on a retrofitting project. I need to control 3 DC brushed motors with full H-bridge drivers. In most scenarios the 3 motors have independent connections: simulate this circuit – ...
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16 views

How can I programming TLE987 through LIN?

I am actually working with a TLE9879QXW40 for BLDC driving purpose and I have some problem with my j-link connection. Pending this problem, I want to try to connect to the microcontroller through the ...
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1answer
30 views

Motor Driver Deadtime, on-switching-time and off-switching-time

I have the following motor driver (DRV8320): https://www.ti.com/lit/ds/symlink/drv8320.pdf?ts=1616576087660&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FDRV8320 Since I want to implement ...
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1answer
25 views

Memory row driver does not have enough driving power

I am building the row driver of a piece of RRAM. Different from traditional memory, RRAM's cells are composed of resistor-like elements. I tried using a single inverter and a back-to-back inverter ...
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1answer
144 views

How to choose the right frequency when measuring coil inductance with LCR meter

I would like to drive a 12V DC hydraulic valve coil using a high side driver (VN7140AJ). The driver datasheet specifies the maximum demagnetization energy (page 24), and I would like to make sure that ...
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49 views

SAR ADC driver circuit: charge bucket and OpAmp GBW

I need a theoretical clarification about how to design a driver circuit for a SAR ADC. simulate this circuit – Schematic created using CircuitLab I found an interesting video series (https://...
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1answer
22 views

connecting teensy + A4988 carrier + motor

I am very new to electronics and I am trying to wire a teensy 3.2 to a A4988 driver carrier and a (unipolar???) motor. I have zero clue what I am doing but I am trying my best to follow the diagram ...
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1answer
62 views

Can Brushless DC Motor (BLDC) be used as Stepper Motor?

I have a BLDC motor and I am keen to know if there is a controller out there that can allow BLDC to be used as stepper motors with (holding torque and accuracy in step size) I know BLDC motors are ...
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57 views

Unable to control 24 VDC brushed motor with dev boards

I'm designing a board that has to control several DC brushed motors. The motors are SY54E-DC24V-2PCE. I didn't find a datasheet but some references like this and this. I measured the DC resistance of ...
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1answer
54 views

Potentiometer vs Arduino, How to replace? [closed]

I have a bldc motor control board(ESC) with potentiometer, the pot is used for controlling speed but I want to use arduino's pwm, so how to remove the pot and replace it with arduino connections? The ...
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29 views

WL1837MOD SDIO Control(or Wifi module in general)

There are a number of wifi module which are controlled by SDIO(as an option). I am using the WL1837MOD as a specific example but I welcome more general answers. All the documentation for this chip ...
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17 views

the non inverted input on TI UC3705 or UC3706 transistor dirvers not working but inverted works fine?

DATASHEET TI UC3705 I have a UC3705 running fine on inverted input digital signal on the pin number 7 at +5 volts and pin 6 at ground from my siglent SDG1032X with a square wave 5 volt hi and 0 volt ...
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46 views

Do PWM Half-Bridge Gate-Drive ICs allow 100% DC?

I read in other questions that is not possible to use 100% DC as PWM input for drivers that use a bootstrap/charge pump to shift the gate levels. I'm talking about common brush DC motor gate drivers, ...
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1answer
48 views

How to drive P mosfet gate to ground in half bridge synchronous DC buck/ boost converter

The diagram shows the totem pole driver circuit for the Hi Side P channel Mosfet driven from PIC pin PWM output. This is part of a buck boost circuit running at 250KHz. The biased totem pole ...
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2answers
52 views

MIC5891 driver output voltage

I am troubleshooting a relay driving board that uses an MIC5891 to drive a 12VDC relay (86Ω coil). The load supply voltage into the 5891 is 12V. When checking an output with no load I get 12V. When I ...
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1answer
60 views

Use DC Motor driver for electromagnet

I need to control the force exerted by an electromagnet using an MCU. it's not a commercial item so I don't have any datasheet. Here what I know: resistance: 8,9 ohm may be powered up to 60V (with ...
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2answers
451 views

Output drive vs. absolute max output current

In many Texas Instruments datasheets (e.g. this one) there are two different stated values for current per output: Output drive, stated as 4 mA at \$V_{cc}=5 V \$, page 1. Continuous maximum current ...
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42 views

Unsure about bulk capacitor value and type for custom PCB

I'm designing a custom PCB (90x90mm approx) which is using an ESP32 module to drive 5 dual channel H-bridge ICs (DRV8835) which control 9 miniature brushed DC motors (1A stall.) The datasheet of the ...
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68 views

Driving optocoupler by a line receiver

I wanna drive TLP350 by a line receiver AM26LS32. I employed scheme 1, however, there was no signal on output. I found in line receiver datasheet that the current sign is negative so it is likely to ...
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1answer
61 views

Define the purpose of these components in the operation of this low side driver

I am trying to understand the operation of the following low side driver circuit I found in a schematic of an old pinball machine (redrawn for clarity): L1 is a Solenoid and Q1 is a Darlington BJT (...
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76 views

MX1508 motor driver flyback diode controversy

Hi I am trying to use the MX1508 motor driver with my 6V dc motor, but I've read criticism that it doesn't have flyback diodes. I'm seeing conflicting opinions online about this. For example, in this ...
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1answer
98 views

USB Qualcomm Quick Charge 3.0 on PC (Linux Ubuntu)

As nowadays PC motherboards supports USB voltage manipulation I will ask on given example hardware/software. I am using Ubuntu 20.04 installed on machine with Motherboard Gigabyte AORUS Z390 Master. ...
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1answer
144 views

Stepper motor shaft vibrating and vibrates the load

I am new to the electronics hobby so any hep is appreciated. For my application I need a quiet motor that can provide high torque at low speed. I purchased a NEMA 17 stepper motor (model is 17HS4401s) ...
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1answer
129 views

BLDC motor and drive power loss calculation for dynamic application

what I have done so far: calculated torque and speed of the motor (robot arm swinging mass) used equivalent circuit for DC motor as model for BLDC: U_terminal=L* di/dt +(I_o+ I_load)* R_ph-ph +k_emf *...
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32 views

What is proper power / driver size to use with an Osram Oslon Black Flat Led board?

I am trying to determine the proper power to send to my specialized LED board. The board consists of 6 Osram Oslon Black Flat Leds. I currently have 4 of these boards, 2 in each headlight. I have each ...
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2answers
98 views

Half H-Bridge using IR2104 doesn't work

I'm trying to build a half H-bridge using an IR2104 driver. I want to use it for driving "high power" things such as a brushless motor (100V, 40A), or high power LED (200W). But it doesn't ...
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33 views

What device to power 4 directional coils to rotate magnetic field

I am trying to make a solid state device that creates a magnetic field applied on an sample that can control the field direction and strength. My current design uses a 8 coil stepper stator that has ...
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2answers
48 views

L298N Current or Voltage source

I want to power some coils using a controlled current, but I know as the coils heat the resistance changes. Will the L298N keep that current controlled at a certain enabler voltage?
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1answer
32 views

L298N minimum output current/voltage

Does the L298N have a minimum output voltage? I want to control it such that the output varies from -Vs to +Vs, does it go linearly near 0, or is there a threshold that it passes? I can't tell what ...

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