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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1answer
439 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 ...
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4answers
69 views

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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1answer
239 views

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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1answer
26 views

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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2answers
174 views

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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42 views

Someone has a circuit for a isolated driver (both input and output) to my project?

I'm working on a self-oscillator Buck converter. My simulation on PSIM has a perfect output, as you can see. But I need a more realistic simulation on another software (with Spice models), so I need a ...
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1answer
58 views

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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0answers
68 views

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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0answers
123 views

VDS Fault on A4964 BLDC motor Driver

I am actually designing a BLDC motor control unit with the A4964 Driver. I made the design for working on 24V supply. I did severals test and HW/SW modification but unfortunaly, the motor won't run ...
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0answers
42 views

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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2answers
337 views

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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0answers
243 views

Sine Inverter MOSFET Driving Problem

Hello Electronics Gurus and Experts. I'm trying to build a sine wave inverter using PIC micro controller However I'm not able to drive the power MOSFET. After some research on internet i found that ...
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2answers
76 views

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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66 views

Do I need a laser diode driver for this? (noobegginner)

I have a blue laser diode, with max specs of: 2.4w 2.2A 5.2V Currently, im using a ion power bank with a skinned usb wire to power it. The maximum current I measured from it is only 1.4A, and voltage ...
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1answer
140 views

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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2answers
432 views

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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1answer
119 views

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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1answer
71 views

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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2answers
411 views

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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89 views

1EDN7512B MOSFET driver not working

I am facing some difficulty getting a 1EDN7512B driver from Infineon to trigger at all. The following is one of the simple test circuits I quickly threw on a breadboard to test, with no success. I am ...
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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 ...
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1answer
51 views

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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38 views

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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4answers
4k views

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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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. ...
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2answers
179 views

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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3answers
124 views

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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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 ...
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1answer
133 views

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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2answers
801 views

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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1answer
118 views

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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0answers
63 views

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 ...
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2answers
257 views

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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1answer
75 views

Reduce Power of High frequency output signal (40khz)

I want to try and make the output power of the following driver board adjustable. At full power it runs at 100watt I. The board itself does not have an option to reduce the power output. The output ...
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3answers
377 views

Darlington array: How to output desired voltage at uln2803a driver colectors?

Someone suggested this driver array to get the current I need: datasheet I also need a 12V signal and about a current of 100mA in order to control a relay coil. My 12V signal would come from a logic ...
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2answers
1k views

Half H-Bridge Driver

I'm working on a project to control power sideview mirrors in a car, with features like TildDown, that tilts some of the mirror down helping to park. The circuit is pretty simple, but I'm having some ...
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1answer
145 views

LED Driver, Turning ON/OFF consistently

I am building an array of LEDs that I plan to power up with an LED driver. Here is the one I chose - Mean Well LCM-60U I have been using it and it works great. However, I have one thing I am trying ...
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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 ...
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1answer
54 views

Multiple Lamp indicators and LED driving using TPL7407LA simultaneously

I am using TPL7407LA for driver circuit, it will be getting inputs from pic18f67k40 and driving multiple Lamp indicators(24v) and multiple LED indicators(12v). My question is : Is it possible to ...
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0answers
90 views

Voltage Gain for Driver in Class AB Amplifier

Can anyone tell me how to calculate the Voltage gain for Q3 in the following schematic ? Is it the same method (or partially modified) like the one used for Class A amplifiers for Voltage gain ...
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4answers
92 views

How can I control 2 or more seven segments displays using a single microcontroller?

Is it possible to control say up to 4 seven segments displays using a single microcontroller and having some I/O ports left? For example, say I would like to show a reading with 4 seven segments ...
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2answers
919 views

n Gate to source capacitor in gate drive?

I'm designing a gate drive and I saw in a reference design this circuit, what would be the explanation for placing a capacitor between gate-source of the MOSFET (or IGBT)? I've read that a resistor is ...
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1answer
2k views

Mimic a pick-up coil to drive a CDI ignition

I'm researching why an ignition coil passes ohm's testing but doesn't work. Installed on the vehicle and the engine doesn't run correctly. At first stages of bench testing and I'm still not finding ...
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2answers
172 views

Termination between driver and transceiver

I have the following line driver and line transceiver driver: 74VHC244 transceiver: 74VHC245 They're connected via a 0.5m long ribbon cable with an impedance of 100Ohm. The digital signals have a ...
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2answers
55 views

How to calculate the maximum data rate or frequency of a bus driver

I'm searching a suitable bus driver for a project. I found the Nexperia 74VHC244D. On the website they say the maximum frequency is 60MHz (here). But how do I calculate the 60MHz? Because it's not ...
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1answer
116 views

Voltage clamping for nixie tube driver

I want to design a nixie clock based on a high voltage shift register: the HV5530. I don't what to multiplex the tubes to avoid loss in brightness. My idea is to leave the anodes powered all the time ...
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1answer
52 views

Motor controller oscilations with flyback diodes

Have some motor controller oscillations with flyback diodes when they were added to the build. They emerge with higher rates of signal amount making by controller. So there is a need to reduce the ...
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1answer
209 views

4 Phase 5 Pin high speed motor driving (turbomolecular pump driver)

I just recently purchased a broken Turbomolecular pump from eBay and repaired it, now that it works again I need to build a low-cost driver for it. It has 4 Phases and normally relies on hall ...
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3answers
1k views

Simple LED driver, transistor and GPIO

I'm trying to figure out how to create a driver for a led from the GPIO pins of the raspberry and a NPN 2N3904 transistor. I am currently following what seems to be a good sparkfun tutorial. On this ...
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1answer
220 views

Correct Initialization Routine for LCD Panel (HX8357D)

I have acquired a color 320x480 TFT LCD display based on a HX8357D driver. It is an Adafruit 3.5" Touchpanel display. I would like to use it for one of my projects based on Rust. Currently, there ...

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