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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Mosfet drive for inverting buck boost converter
I'm working on an inverting buck boost circuit for university and have come up with the following schematic. I'm ordering quite expensive parts so I wanted to get some opinions and advice as to ...
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1
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Help in understanding Audio line output stage
I was trying to understand the audio line output schematic shown below but couldn't make sense of it.
This circuit comes after the output of an Audio DAC PCM1725, followed by an active 1st order low ...
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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 ...
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How to calculate the power dissipation of a receiver and a driver?
I'm using the AM26LV32E receiver and the AM26LV31E driver and need to calculate how much power is dissipated on them (max).
I've been told I can calculate this using:
(1) For receiver: ...
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LCD Driver Questions [closed]
I recently disassembled some old Night Vision goggles (Jakks Pacific Night Vision goggles) and found a 420x234 LCD Panel inside connected to a 40 pin ribbon cable.
Do you know of any drivers I could ...
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2
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Driving piezo scanner tubes using the driven internal electrode configuration
I'm planning on doing a project involving a piezo tube scanner (PTS). The PTS will be used for 3 axis manipulation of a sharp needle. PiezoDrive has a few scanners and some info on how to use them. ...
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Alternatives to op amps LM307N and TL071CN
I'am working on an amplifier/driver circuit for a spring reverb bank. The circuit is from the 90s, but still used:
Accutronicsreverb Drive 1 Circuit
My issues are the LM307N and the TL071CN. These ...
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2
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Vacuum Fluorescent Display: What are the benefits of an AC filament driver instead of DC?
Question is already in the title:
What is/are the benefit(s) of an AC filament driver instead of DC for VFD displays?
It works with DC so why to invest in an AC driver?
Anyone?
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Development kit for learning USB device driver development
I want to learn writing device drivers for USB devices (on linux kernel or microcontrollers, if that matters). Hence, I am looking for sample USB development kit.
e.g. when I wanted to learn I2C, I ...
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Can this driver be simplified?
I have this driver. It has two MOSFETs and two complementary signals to drive them:
The load (a bunch of LEDs) sees 5 V or 0 V and, in average, they take a maximum of 100 mA.
However, the top MOSFET ...
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Temperature of Power Driver ICs
I'm using TI DRV595 power driver in an application requiring several amperes of current. My observation using thermal camera has been that at 3.5 A the driver IC core reaches temperatures around 90 ...
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Is it possible to drive a power piezoelectric in lower frequency than its own frequency?
I am driving a piezo transducer simply by an inductor series with piezo.
the resonant frequency of the piezo is about 40KHz and I designed a 20KHz transducer.
I'm giving a pulse voltage (using a class ...
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Controlling a relay with a MCU output pin and trying to drive a solenoid using the same power source
I've used a known circuit design to successfully (wait for it!) control a 12V relay using a 3.3V MCU pin, from the pictures you can check that I am using the same 12V power source for both (relay and ...
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How to setup the NCV7708B h-bridge/double hex driver?
I am working on a circuit to control an electromechanical display and settled on the NCV7708B Double Hex Driver (datasheet).
I created a minimal setup on breadboard in order to test the chip:
I ...
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Turn on darlington(s) with 3V MCU
My goal is to get a 3.3V MCU (probably a ESP32) to drive this circuit. It is driven with a square wave from 15 to 40 Hz where the pulse width itself of 2.5 to 13 msec. When searching for answers, the ...
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ATSAM / ASF4 - how to use HRI driver
While trying to change the analog reference voltage in ATMEL Studio for ATSAMC21 I found no way to configure this in ATMEL start and in the higher level drivers.
So I searched around the ASF a bit ...
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Should an NCP3420 Draw Minimal Current with Only VCC and GND
I am trying to make a Buck Driver (More Info). While Building up the circuit and testing it seems to draw too much current. The NCP3420 was getting warm.
NCP3420 Datasheet
After Removing it and only ...
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IGBT gate driver burned, why?
I am trying to use an IGBT module (dual IGBTs in common-emitter arrangement) as a static switch for 120VAC. I've done as much reading as I can, and I understand there are issues with losses and turn-...
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Unable to drive MCU pin high
I'm trying to drive a MCU input with a RS-485 driver chip, specifically the SP3485 on the SparkFun RS-485 transceiver breakout.
When I connect the MCU pin directly to the 3.3V power rail, the pin ...
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Methods for increasing output power and efficiency of a ZVS flyback driver
I have built the following ZVS driver:
I am using this circuit at a resonance frequency of 150kHz.
My hope is to be able to modify this circuit for wireless power transmission. With that being said, ...
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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 ...
user220456
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Are ultrasonic Tx/Rx pairs really just the same sensor?
I want to retool the classic HC SR04 rangefinder to be able to do ToF gas flow sensing. I need to be able to do ToF on a column of air in both directions, so it benefits me to be able to use the ...
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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 ...
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LED DRIVER: Buck Converters output current ripple
I need to design a led driver of up to 1A, to drive some infrared and near infrared LEDs.
Due to the nature of my application, the intensity of the light should be as stable as possible, as ...
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Which stepper motor should be enough to move a water valve and for the TMC2130 driver?
I need a stepper motor and a driver to control it. But I don't know which would meet my needs. I have an Arduino MEGA 2560 if that's relevant.
Aim
I need to close and open a Nupro valve with ...
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Access device commands on Lenze 9400 Highline driver via Twincat3
I want to access the device commands on a Lenze 9400 Highline driver via CANoverEthercat(Twincat3). Is that possible and how can I do it? Specifically, I want to access the Device command 51: Identify ...
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2
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Power BJT Transistor in motor driver keeps burning
The power transistor 2N3055 keep getting damaged after connected for a couple seconds to this circuit. I would like to know what could be the cause.
I soldered this circuit for a 6-wire stepper motor ...
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Driving car electrical vacuum pump
I am trying to drive an electrical vacuum pump from a car directly from 12 VDC.
Earlier, I succeeded with a different pump just by connecting them to DC power, the other pump (different brand) used ...
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Change current in steps for pulsed LEDs
I want to control the power consumption and intensity of a IR LED which is fed by a 38kHz signal.
Can I add mosfets in series with different resistors (25/250) like in my schematic? Application is a ...
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UART communication with a Thorlabs chip
I am trying to configure a Thorlabs temperature driver (MTD415TE), using a UART-USB connection. For this, I am using a Foca v2.2 with a FT232R USB-UART cable. I am using serial terminals such as ...
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Best method to drive SPI over 1 m
In my current project I need to control 8 analog multiplier. They are controlled with SPI but without the MISO line, so I would need to route :
SCK
MOSI
8 slaves selects
So 10 signals in total. The ...
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What's the maximum current at every output of this driver?
I'm using the driver DS26LV31T and need to know what is the maximum output current for the output pins (P,N, for example pins 2,3).
I'm confused because I'm not sure where to take that information ...
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Should bus transceivers be used for a legacy M68SEC000?
I'm working on designing a simple "retro computer" based on the NXP 68SEC000. The "SEC" variant (by NXP) is essentially a Motorola 68000 with a few differences. ...
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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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1
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648
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Capacitor to discharge upon switch open
Update Please evaluate this third attempt:
This is my first electrical project, so please be gentle with me. I know very little about electronics.
I'm building a machine that has a crank that users ...
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LED Driver with minimum input current and large LED current(peak)
I am designing a LED driver.
Power source - 18V-42V (I can draw max of 6mA-7mA from source)
LED string - 4 series LEDs of 6 strings in parallel ( total 24 LEDs)
I need min of 200mA of peak/...
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BLDC Motor PWM commutation scheme
Actually I'm trying to understand how to control a BLDC motor using trapezoidal method. I've found two illustrative images that show how to PWM each motor phase:
First
Second
In both of this images,...
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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 ...
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120
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Inrush current and number of devices per MCB
I'm looking at some LED drivers meant to be powered by the regular mains voltage (230V). The datasheet specifies how many drivers can be connected to a single Miniature Circuit Breaker (MCB) on ...
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0
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High Side - Low Side Driver selection
I'm currently using a pair of IPT015N10N5 FETs in half bridge configuration, to drive a motor. The FET gates are driven by a UCC27211A-Q1 High Side/Low Side driver. I'm thinking that this particular ...
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Driving relay directly from optocoupler, what is best?
I'm designing a smart socket using an ESP-32 and a mechanical relay that can drive 5A at 240VAC. Following typical relay driving circuits, I would like to use an optocoupler between the MCU and relay. ...
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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.
...
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HV9961 led driver: trying 170V led output
I face to some issue with my prototype based on the HV9961 (see picture).
I replaced L1 by a 1.8mH power inductor and R1 by a 68k resistor. Those values came from HV9961 datasheet formulas for a 170V ...
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Constant Current Drive for LED
I am going through the circuit as shown above.
In such LED drive design (constant current), I am not sure about the role of R16 (2 ohm) resistor.
Is it for transistor to have less power dissipation ...
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341
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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 ...
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Gate driver using switches UC3842 PWM Controller
I have prepared a crude model of boost controller using PSpice simulator of UC3842 IC
Gate driver has Ron and Roff as 1 and 100meg respectively (S3 and S5)
and Vout will go to external mosfet or a ...
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Is it OK to use internal pull-down as part of voltage divider?
There is a NUD3160 relay driver on the board that I need to set ON at power-up. According to datasheet, it has internal 100k pull-down and 2V threshold voltage. So, if I add external 910k pull-up to ...
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311
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Connecting logic gate input pin with pull up resistor to another driver input pin doesn't keep the voltage
I have a circuit with logic gates that implements a function in order to get 3 logic control signals. This logic works with 12V or 0V for high and low states. Logic input pins will be connected to ...
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LED Board Driver Calculation [duplicate]
If there is a Board that has 100 LED diodes however using different Diodes that have Different specs (Maximum Reverse Voltage, Max Wattage, Maximum drive current etc.) similar to a Quantum Board LED ...
0
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2
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688
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Determining Blanking for HDMI Transmitter
I am working on a project which produces a video output over an HDMI connector. The driver I am using is the Texas Instruments TFP410PAP.
The image I am attempting to display is WVGA, 800 x 480 ...
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