Questions tagged [driver]
A chip or a circuit that sends a signal with more current or voltage, or over longer distances.
935
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What is the best way to drive a small coil digitally?
I have a coil of wire with about 40 mΩ worth of resistance for a hobby project. I would like to put up to 2 A through it. Ideally I would like to be able to choose how much current goes through it in ...
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3
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Purpose of resistor in inrush current circuit for MIC2289C LED driver
I am looking to use the MIC2289C LED backlight driver from Microchip in a circuit and have a question about the unnamed resistor that connects to the FB pin of the driver and the cathode of the LED ...
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2
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What's causing MOSFET driver failure in my coilgun circuit?
I'm working on a small coilgun, and am running into an extremely annoying problem with my circuit.
Circuit schematic:
PCB Layout:
Key components:
Flyback diode: BYC30X-600PSQ
Flyback resistor: ...
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2
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93
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LM311 ZCD out to LM555 reset
I have no background in electrical engineering other than curiosity; I'm more of a copycat. I have been trying to reproduce this schematic:
I have searched the forum but don't see anything remotely ...
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2
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2
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126
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Driver circuit for dual-coil relay
I have a dual-coil relay. The coils are rated at 12 V. The coils set (or reset) at 6 V, and require a pulse of between 15 and 100 milliseconds.
The relay is TE Connectivity, part # V23130-C2021-A412.
...
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1
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Scan codes from PS/2 keyboard misbehaviors
In my quest to build my first CPU, I am trying to hook up a PS/2 keyboard to my FPGA. The keyboard is a Perixx PERIBOARD-409P.
After a bit of reading, I hooked up the keyboard to a scope to verify its ...
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1
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119
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What's the function of this schematic? - Waveshare E-Paper driver
I am currently designing my own PCB which combines a microcontroller board and a Waveshare e-Paper driver board (Schematics). I wonder what the functionality of this part here is. Can anyone help me ...
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Do I need a pull-down resistor with this MOSFET-based motor driver?
I'm using the circuit in the picture to control a 12 V DC motor with an ESP32.
Do I need an extra pull-down resistor between the microcontroler pin and ground to avoid my pin floating and maybe ...
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1
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78
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OpAmp filter drive capabilities
My application requires a high input impedance. Therefore I am using 2 x TLV313 OpAmps as unity-gain buffers for my ADS1296. They also provide an adequate common-mode output voltage (2.5 V) for my ADC....
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Need 64Hz square wave green LED driver for a mosquito zapper
I have several 10 watt COB (Chip-on-Board) green LEDs which apparently are the best color to attract mosquitoes if driven at an ideal pulsing square wave frequency of 64 Hz.
I was going to use a ...
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How to translate a connection (Step Motor Driver)?
I am following this connection to get a driver to an Arduino and a step motor. The original connection is this:
Green wire --> Step
Blue wire --> DIR
Red wire --> +5V
My driver, However, has ...
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1
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103
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Power supply design requirements for IGBT driver
I'm trying to determine the proper power supply type and output current requirement to drive a three phase IGBT driver (this is a follow up to a previous question I asked, although focused on a ...
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1
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To decouple or not to decouple these LEDs/drivers?
I am designing an aluminum PCB for some custom aquarium LEDs. I've done a lot of searching on mouser and read lots of data sheets for drivers that would suit my needs. Most of them have "typical ...
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Motor voltage spike
The circuit below is used as a relay in order to cut-off the common ground C- and Motor-.
In my system, the m otor driver (Motor+,Motor-) is connected in parallel with the supercapacitors (C+,C-.) ...
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4
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Why does MOSFET N back to back switch work?
Please consider an exemplary back-to-back MOSFET N driver IC (drew the body diodes of M1 and M2 for clarity):
I understand how is it possible to turn off the M1/M2 transistors from the gate voltage ...
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Output resolution of PWM H bridge drivers such as L298N
I am working on a project which require a high resolution of the output signal of L298N or similar driver. Is it possible to control the output signal with a 1% resolution or better? What is the ...
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AC LED driving circuit - How to drive low voltage LEDs?
I've been tearing down LED light bulb to see how they were driven and found out that most of them use this very simple circuit:
This is my understanding of the circuit:
220V AC Input (I'm un Europe)
...
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1
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Need help to make a portable LED light based on the LM3421
I am trying to make a portable LED light based on the LM3421. I would like to use it in buck boost mode.
Input voltage from 4s battery-- 12 to 16.8
LED voltage - 14.4
LED current - 3A
PWM frequency ...
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2
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241
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How can I drive small motors with 3.7V PWM?
I want to use a small PWM driver PCB (that I hacked from a RC vibrator sex toy) to drive three other motors using a single 3.7V lithium-ion battery. (The motors are rated 3V.)
The PWM driver ...
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Raspberry Pi 3 motor code gives gpio error
I am trying to code a motor using the GPIO pins on a raspberry pi 3 and for some reason, when I run the code, it gives me this error:
GPIO.setup(enable_pin, GPIO.OUT) NameError: name 'enable_pin' is ...
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0
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96
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Stepper Motor Driver CLK-IN vs Parallel-IN
I have a few questions about stepper motor drivers. I'm currently trying to build a PCB with a stepper motor driver IC to gain a better understanding of them. Here is the link to the IC I'm using: ...
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2
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94
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Will this relay driving circuit work or can it be improved?
I am building an IoT connected ECU for electric 2 wheelers.
3.3v is from an ESP32.
Relay
Optocoupler
Diode
I am working on a budget and I am also new to designing that's why I want to know if this ...
2
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0
answers
71
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Buck converter driver LTC4446 running too hot, too high current
I am trying to design a buck converter, but the driver LTC4446 is getting to hot with this design and the input current is also to high (130 mA), when it should be in the uA orders... Any ideas of why ...
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3
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High power pulsed LED
I found this circuit on another thread on this site and I believe it is close to what I need for my own application (Short duration (approx 128 us), low duty cycle (<1%) high power LED pulses). ...
2
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1
answer
1k
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STM32H7 ADC Baremetal - ADC not ready - ADC no conversion
I am trying to make baremetal ADC driver for following development board STM32H723ZG Nucleo (144 pins).
Reference manual:
STM32H723 Reference Manual
Datasheet STM32H7xx Nucleo Datasheet
To simplify, ...
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Questions regarding setting up a Driver amplifier. (For example, what the "Crossing Point Adjustment"?)
In my lab, I have a fancy arbitrary waveform generator that can produce electrical pulses that are 10 nanoseconds long. Currently these signals are being sent through a driver amplifier (see here). (...
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Selecting a Gate driver for IGBT
I have trouble choosing an IGBT gate driver for PMSM motor control application. Can someone help me with the procedure? I went through few papers and I'm stuck with finding the external and internal ...
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1
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114
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Why does this relay not turn on but it is connected to 12V? [closed]
I am looking at a driver for my relay, but in the applications page I am confused as to how the 12V battery at the high side does not already turn on the relay?
Attached is the picture from the ...
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I'm looking for the Windows-10 driver for the Atmel bootloader used in the Atmel UC3-A3 Xplained evaluation kit
I have a couple of Atmel boards called Atmel UC3-A3 Xplained
evaluation kit, and am trying to use them in a project.
I want to use the bootloader, which is apparently pre-installed on the AVR32 chip, ...
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1
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116
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Why are my IGBTs failing?
I am testing this H-Bridge circuit for driving a DC motor.
The Vdrive signal is a full wave rectified \$220 V_{RMS}\$, and I am using a PWM signal in the SD net to control the final voltage.
The motor ...
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1
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107
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How to power a DC motor using the output of a driver IC
I am a hobbyist new to electronics, trying to build a water level indicator (and controller) for my water tank. I built a circuit (like the image below) which uses an ULN2003 IC to turn on the LEDs ...
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1
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Designing IGBT driver: question about datasheet specs
Summary
I'm trying to design a driver for a high voltage, IGBT driver, using an optocoupler for isolation, and have a question about whether this design is compatible with some of the numbers in the ...
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How Does an Adjustable Transistor Size CMOS Driver Work?
Background
The source-terminated reflected wave switching scheme is a familiar one. One just needs to add a source-series terminator, which added together with the driver's output impedance equals the ...
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A6211 works fine alone, but when I merge two A6211s on the same PCB, there is a current leak
I need some help; I probably lack electronic knowledge here.
I got an LED driver circuit from Allegro. It uses the A6211 IC.
First I tested it on a protoboard and it worked fine; I controlled two of ...
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1
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104
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USB Device Intermittent Disconnects
I have Xilinx Eval Board(SP605) with USB-UART bridge(SI CP210x). The board is connected to Win10 Computer USB port. The USB communication is failing intermittently when running tests.
Observation so ...
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1
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Help driving a display
I am trying to figure out a way to drive this LCD display, the datasheet can be found here https://datasheetspdf.com/mobile/611974/LG/LB070WV1/1 on page 8 it has some info on the connector/interface ...
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1
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48
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Why does max current handling differ greatly form different MCU boards?
I had successfully controlled my power inverter using an Arduino DUE (Atmel SAM3X8E). To drive all of my six power MOSFETs (IRLZ24N) each GPIO is interfaced by a Photovoltaic MOSFET Driver (Panasonic ...
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1
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118
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LT3966 LED driver design
I have 2 strings of LED which have 6 LEDs in series. Initially, I considered using one CC boost module and a matrix dimmer, or a single driver with multichannel load switches to control the strings ...
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2
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106
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Ringing across IGBT with Infineon driver IC
I am testing the 1ED3123MC12H driver IC with an IKW15N120BH6 IGBT in a buck converter circuit.
Vdc=30V, 0.6mH and Fsw=10 kHz.
Ringing is creating a problem.
How can I fix the ringing?
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NXP kinetis chip to drive UART RX on Digital SX Pro
I have connected a NXP kinetis development board to a digi six pro development board via UART ports.
Originally I thought I could directly connect the RX and TX lines but found communication to the ...
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90
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why use not gate to build driver and receiver [duplicate]
I am reading the book Digital Design and Computer Architecture. In this book, it describes logic levels that map of a continuous variable onto a discrete binary variable. and it introduces two gates ...
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3
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Load driving using ULN2003
In the attached schematic as shown, I am using ULN2003 for supplying 2 voltages 28V and 12V to the loads. The loads being connected to the load will be switched on one after another.
The base ...
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117
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CCD sensor Reset gate and Substrate clocks
I am trying to understand the datasheet on Sony ICX404AL CCD sensor and design a small circuit with it.
However I am a bit confused with Reset gate and Substrate clock signals.
Information from the ...
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3
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53
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CS-D808 and NEMA34 undervoltage
I want to drive stepper motor with CS-D808 (30V-80V) but I don't have enough power, I have 24V. I couldn't move stepper motor. Is this because of power?
Here is my Arduino code:
...
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163
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IGBT and a high voltage circuit
I have never built such a system before and have already made several mistakes. I ask for help in drawing it up correctly so that it can start working.
I intend to control the power supply to coil L1 ...
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Audio transformer power level
I am going to use SP-69.
https://catalog.triadmagnetics.com/Asset/SP-69.pdf
Its power level is 50mW.
I am going to use DRV135 to drive audio transformer(SP-69).
Output voltage of the DRV135 is 7Vrms(...
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1
answer
57
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Driving 2 Stepper Motors using a Quad Motor Driver Shield
I've tried driving two Size 8 Bipolar Nema Stepper Motors using a Quad Motor Driver Shield from DFROBOT. I get vibration and noise through the motor but can't get it to move. Is it possible to use ...
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3
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138
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How can I flash a microcontroller from a GUI? (A driver software concept) [closed]
Assuming that I have three LED lights, and I have created a GUI that allows the end customers to choose which color each LED is going to display and then save it to the permanent memory of the ...
0
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1
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155
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Is this ringing a problem after "Relay coil fast demagnetization". If so, how to stop
In the question Relay coil fast demagnetisation, a diode and a zener were used in series to quickly remove the energy from an inductor. The question posed an example of a 24VDC 400mW relay, and I ...
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