Questions tagged [driver]

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

Filter by
Sorted by
Tagged with
4
votes
1answer
97 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 ...
1
vote
2answers
135 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 "...
0
votes
2answers
59 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 ...
0
votes
1answer
56 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 ...
0
votes
0answers
25 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 – ...
0
votes
1answer
393 views

Push-pull output stage and driving circuit function

simulate this circuit – Schematic created using CircuitLab Hello, what is the exact purpose of the C3 and C4 capacitors, two diodes and R3 and R4 resistors in this circuit used to drive the ...
1
vote
2answers
94 views

Switching relay directly with an optocoupler

I have a relay network (more than 1 relay running in parallel), that I need to operate using a STM32 based MCU. The relay I am using is Omron G5V-1 (24v). I wanted to know if I can directly run these ...
0
votes
0answers
14 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 ...
0
votes
1answer
28 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 ...
0
votes
1answer
154 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 ...
0
votes
1answer
457 views

Back EMF of an H Bridge

I am building a H bridge to control a motor in the middle. As an example, when power is fully removed (24V... 80V in the picture below), there is some back EMF that will drive the 24V input rail. ...
0
votes
1answer
423 views

Inconsistency Issues With Stepper Motor

I am attempting to get my stepper motor to rotate 90 degrees, stop for a second, and repeat these steps. Please note I am a beginner, but I have taken physics courses so I do understand most basic ...
4
votes
1answer
104 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 ...
0
votes
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 ...
0
votes
2answers
401 views

Controlling multiple servos and servo driver through Blynk

I'm working on a project to control multiple servos using a servo driver, through sliders on Blynk. I'm using: ESP8266 WeMos D1R2 microcontroller (wifi connected) Adafruit PCA9685 Servo Driver Blynk ...
0
votes
0answers
41 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://...
0
votes
1answer
18 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 ...
1
vote
1answer
49 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 ...
0
votes
0answers
52 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 ...
-5
votes
1answer
53 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 ...
0
votes
0answers
26 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 ...
0
votes
0answers
42 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, ...
0
votes
0answers
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 ...
0
votes
3answers
127 views

replacing AN6878 led driver IC

I'm trying to replace the obsolete AN6878 led driver (logarithmic response, used for audio level indicator) with a modern and available solution. I'd like to keep the same functionality of the ...
0
votes
1answer
47 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 ...
0
votes
2answers
46 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 ...
1
vote
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 ...
0
votes
1answer
50 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 ...
1
vote
2answers
443 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 ...
1
vote
0answers
40 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 ...
0
votes
1answer
178 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 ...
1
vote
1answer
2k 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 ...
1
vote
1answer
106 views

Input impedance of TTL driver in a RF switch

I have a RF switch "ZYSW-2-50DR+" which has a built-in TTL driver. So far as I understand, the driver is like a buffer which amplifies the current while keeping the voltage same(unity gain). ...
0
votes
1answer
104 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) ...
1
vote
1answer
1k views

Latching/Non-Latching Relay Driver Circuit with darlington optocoupler

I'm designing a circuit where an ESP8266 controls two types of relays, a single coil latching relay and a normal non-latching relay. The relays are power relays use to control low power electrical ...
1
vote
1answer
158 views

Xilinx FPGA “X” state in simulation and didn't find the bug

I wrote an ASRAM in VHDL and simulate it. I get many "X" if I try to read. I know that this problem is caused by too many drivers on one net but I didn't find the problem nor solved it. Appreciate ...
0
votes
0answers
50 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 ...
1
vote
1answer
60 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 (...
0
votes
0answers
59 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 ...
0
votes
1answer
66 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. ...
0
votes
1answer
71 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 *...
4
votes
3answers
13k views

How to use N-channel MOSFET as high side switch (non-buck switching)

I have an application with some constraints for which it feels difficult to find a solution. load current more than 10A, so N channel MOSFET is preferred; working voltage is a bit high, between 50-...
1
vote
1answer
201 views

H-bridge, LED driver, DAC

I am trying to interface a circuit with an FPGA. There is an H-bridge in the circuit that is driving me crazy. The inverted RED and IR signals are coming from FPGA. The light intensity signals are ...
0
votes
1answer
436 views

Modify generic chinese LED driver circuit

I have a lot of LED flashlights and lanterns from China that use a simple IC as their driver to get these different light modes. For instance I have this small keyfob lamp that lights in the following ...
0
votes
0answers
27 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 ...
0
votes
2answers
350 views

Drive a resistive heater from a low power IC

I'd like to drive a resistive heater using an IC operating at 3.3 V. The heater may need to dissipate up to 18 W, and will be powered by a 28.8 V battery. The IC is able to generate PWM signals, but ...
1
vote
2answers
73 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 ...
0
votes
0answers
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 ...
0
votes
2answers
40 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?
0
votes
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 ...

1
2 3 4 5
17