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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BLDC motor - strange phase waveforms
I trying implement bldc motor driver based on below schematic.
The color circles on schematic correspond to waveforms from oscilloscope (all probes are connected to common GND of MCU and PSU that ...
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Stepper motor doesn't spin - it just vibrates
I’m using a NEMA17 stepper motor (17HS4401) and TMC2225 driver (upgraded from TMC2208) for my artwork.
It had a problem after about 3 weeks since the exhibition started.
The motor vibrated loudly and ...
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Buffer / Line driver ; 3 state IC Working
I am just curious to understanding the working of this - Buffer IC (Part Number - 74AHC1G126)
My questions :
I figured out that this IC does not act as a level translator which changes the voltages ...
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Can you help me to identify this IC?
I need help to identify this IC:
Context, truck gate driver:
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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 ...
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Calculate supply voltage based on motor specs
I'm a software engineer with no experience in building electronic circuits. I'm trying to operate 2 motors from a Raspberry Pi via a H-bridge motor driver. Given the motor specs like torque, RPM and ...
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Can't seem to get high-voltage source driver (TD62783APG) working
I'm trying to power 12 V DC motors using a high-voltage source driver (TD62783APG or UDN2981).
I made a small test project with a 5 V power supply and a single LED.
I thought that when driving I2 ...
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Very High Spike and Unusual MOSFET Gate Switching Signal
My apology if I describe something wrong in this question, English is not my native language. I've been trying to work on a bidirectional converter simulation, but there are a few problem I met with ...
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Driving a 3x3 RGB LED matrix using programmable IC
I am looking to build a 3x3 RGB LED matrix with individually addressable LEDs as a form of user interface.
I do already have a micro controller available but want to use it only as high level ...
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Understanding a driver manual
I'm a bit confused about this driver manual about its communication protocol. I want to turn on and off the driver by its I2C interface using its "I/O Connector" with a microcontroller board....
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How to drive a HFBR-1541 optical transmitter?
I want to drive a HFBR-1541 optical transmitter (see page 7; 60mA output current), and I want the driver to have extended operating temperature range (at least starting from -20 degrees Celsius).
The ...
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Improving a linear LED driver for a "breathing LED" circuit
I'm trying to improve driver stage of this circuit:
(the "main LED" is 12 V automotive LED light bulb)
The 555 outputs a triangular wave voltage in range 4 to 8 V and it should be converted ...
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LED matrix driving method
I am currently working on an LED matrix display project. It is not prebuilt and it will be built using individual LEDs. The size is 16x16.
I have been searching about how to drive the display, and I ...
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Driving a solenoid via a digital output
What are the effects of the pull-down resistor (33K) when the solenoid-valve enters its turn-off phase? Will it prevent the solenoid-valve from ever discharging because current would flow from ground ...
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Help with TP2825
I want to create a DVR based on the PB1126 chip using the TP2825 encoder. This encoder performs very well the auto-detection of cameras CVBS, AHD, etc.
On the Internet, I did not find information on ...
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Opto Triac driver (moc3051) basic circuit problem
I wanted to try the basic circuit of MOC3051 which is a random phase optoisolator triac driver.
I used this circuit from the datasheet:
with following parameters:
Vcc : 3.3v
Transistor : BD139
...
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Need help driving my IGBT (Toshiba MG300Q1US)
I have the IGBT above with no driver because I thought I could control with arduino, relay, and separate power supply.
I bought this device from eBay and it doesn’t turn off so Im not sure if it’s ...
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MOSFET driver blows out in half-bridge DC motor PWM controller
EDIT : I've redone the MOSFET circuit diagram; it now represents what my actual layout is. I wanted to spare myself redrawing the circuit but ended up confusing everything, I hope it's clearer now!
...
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FET driving by NPN issue (PWM)
I am having a few problems regarding a simple FET PWM driver. I am aware this circuit does not adhere to the best design practice, but I am in a situation where the design cannot be changed.
I have ...
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Power tree understanding
I am projecting a brushless motor driver that contains a LoRa SX1276 radio and a ESP32-D0WDQ6 chip. The power line then gets really noisy when everything is working.
For the RF blocks (SX1276 and ...
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Wireless power transfer power spikes and low efficiency
I am working a simulation model of a wireless power transfer in LTspice as presented in the image below.
There are current spikes in the input (V3) that I want to eliminate or reduce.
I have yielded a ...
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Battery charger circuit confusion - drive and compensation
I'm building something that is going to have Li-Ion batteries so I'm trying to learn how a battery charger actually works. I've been looking over the datasheets for the BQ2000 and the BQ2954. I will ...
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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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Adding external parts with heat sink to increase max current of SimpleFOCMini driver (DRV8313)
Question: Is it easily possible with some external MOSFETs or similar things to increase the max current the DRV8313 can handle per phase of a 3 phase BLDC motor? Will be 3 parts enough, or would I ...
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Would not this buffer reduce signal resolution for sensor driver? (recommended schematic)
I am following this design.
For my application, the LVDT driver would give me a +-10 V output.
Analog Devices recommeds a buffer for clearing the output signal of the driver. The thing is that they ...
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Constructive Feedback on Grounding in my Buck Converter/LED Driver PCB
Datasheet: https://www.mouser.com/datasheet/2/389/st1cc40-1850179.pdf
Ok, I will come out and say it. After much Googling on grounding Buck converters, I am still a bit confused. I have read about &...
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ATmega16 and 74HC245
I would like to know if a 74HC245 can drive the input pins of an ATmega16.
The bus transceiver opens the data flow toward the ATmega16, which has the port set as input.
So far, the ATmega16 drives the ...
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Is there a way to reset an arduino to factory settings?
I tried to make custom library for my Leonardo to work as a native gamepad, but as it turns out, it isn't as easy as it looks. After i got some code of core arduino and imported it, everything ...
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Driving high-side MOSFET with another voltage source
I am trying to create a negative voltage source with a high-side MOSFET using another voltage source which is 4 V higher than the MOSFET's drain voltage.
In the schematic Q3's drain has 12 V and gate ...
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Inconsistent values read from PCA9955B error flags
The PCA9955B is a 16-channel LED driver that features programmable PWM and current and has gradation support. It also features open/short detection for all of the 16 channels, which is reported in the ...
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Selecting the correct ILI9341 Drive Mode for STM32F407 using FSMC
I have selected the STM32F405 for my next project. With this controller, I am planning to drive a 240x320-TFT with an ILI9341 display controller by using the STM32's internal FSMC interface.
I have ...
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STCS05DR LED driver
I am trying to use the STCS05DR constant current LED driver IC by STMicro in my buck converter design to indicate input power with a 1206 red LED.
The input power is a variable DC battery source (...
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Is it OK to use two vias for a 3A LED return as shown in this ST datasheet?
My circuit is designed for two to three 2.79Vf LEDs @ 3A (Cree XP-L on giant heatsink). It is powered from a 12VDC motorcycle battery.
Link to datasheet
The two vias in question are placed between the ...
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Current sensing circuit [closed]
Could you explain how this circuit works? Does it control the resistance of the 'current sensing resistor'?
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Motor driver using only a 2N2222 transistor?
Is it possible to build a motor driver using only a 2N2222 transistor?
If yes, then how?
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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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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 ...
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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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Error in ST1S41PHR LED Driver circuit diagram? "Unfinished Nets"
I am just starting trying to design simple circuits (using EasyEDA), and I have an issue with an "Unfinished Net", in this 12Vdc_in, 9Vdc_out, 2.5A Buck Driver circuit.
From the both the ST ...
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How to DRIVE a piezo driver circuit
I want to implement a driver circuit for piezo actuators for a positioning system. For this, I require a high-voltage, low-current output, similar to the one discussed here which features a circuit ...
CommunityBot
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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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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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BLDC high-side MOSFET switching - bootstrap confusion
I'm designing a motor driver and I have had too many MOSFET explosions lately.
Following the typical application guide on ROHMs data sheet, I am confused on whether I need to actually bootstrap the ...
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Adjusting the rise and fall time of a gate driver
I have a hard time understanding the specifications of the UCC27511A-Q1 gate driver.
I understand that for a period of 0.5 μs (2 MHz) it can supply a source current of 4 A and a sink current of 8 A.
...
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Stepper motor shaft vibrates, and vibrates the load
I am new to the electronics hobby so any help 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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Distortion from bridge driver
I am feeding a square wave signal into some NAND gates and then into an ICL7667 MOSFET driver, which in turn drives an LC circuit.
The enable is shown for reference, but if always on.
Trace 1 (yellow) ...
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Can I connect the isolated grounds of multiple DC/DC converters together?
I am working on a project that involves using isolated DC/DC converters to power gate driver ICs that will then switch on/off IGBTs. I have 9 DC/DC converters that will power 9 gate drivers each that ...
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LED driver circuit with a resistor and a capacitor parallel with an LED in automotive dashboard
I'm reversing engeering the dashboard of my motorbike (Yamaha T7 - 2019) and I found and a lot of circurity just to control the LED of a turn blinker.
I figure out this schematic:
Why did they put a ...
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Driver for a CW laser diode
I have a 20mW CW laser diode that I want to control with a microcontroller.
I found that it has to be powered by a constant current circuit so that the power of the laser never changes.
I have been ...
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Suggestion Power Supply Design to drive inductive load
I need to drive inductive load (Helmholtz coil) with power requirement of V = 800V and I= 10A. Planning to use FET based half-bridge circuitry to achieve this. If anyone has better solution to this ...
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