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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16 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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26 views

3-phase inverter - component selection / calculation help

Yes, this is a component selection / calculation topic, it can be considered an "ask". Considering my current schematic and the following parameters: supply = 100~240 VAC (nominal 220VAC and 127VAC ...
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21 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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91 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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54 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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70 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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54 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
36 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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50 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
39 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
64 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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44 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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91 views

IR2110 MOSFET drivers burning

I am currently building an H-bridge for my Tesla coil with this video as reference: H bridge. The only thing I changed was that I swapped the pull-up to pull-down resistors and I am using IRFZ44N and ...
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72 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
121 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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40 views

Laser Driver for 405 nm laser diode

I'm new to this site and this is my first post here. So my plan was to try building a laser or better a driver for my laser diode but as it seems I don't have enough of the technical understanding of ...
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1answer
24 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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29 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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16 views

Recover control signals from h-bridge output

I have a board with a H-bridge output: ±24V @ 1A maximum. I'm asked to make a more powerful driver, with higher voltage, without changing anything in the existing circuit. The good news is the ...
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25 views

COB LED Can't figure maximum voltage

I need to know max voltage parameter of COB, it's video led light Aputure c120d(cob 130w, manufacturer "luminus", unknown model, 6000 Kelvins,CRI96+), i have working driver/dimmer with this light. ...
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3answers
162 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
58 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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29 views

Does CP2102N-QFN24 has native support for Android 8.0 or above?

I want to use CP2102N-QFN24 USB to UART chip with Android phones having API 26 and above. Does this chip has native support for Android phones with API 26 and above or need to download/install some-...
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1answer
54 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
114 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
53 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
65 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
753 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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56 views

Laser diode feeding DIY driver

I am interested in feeding a laser diode (LD) with 2.5V and 210 mA. I am using basically a Darlington configuration as shown in the schematics. In order to prevent any damage to the LD I am using a ...
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1answer
47 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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50 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
104 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
36 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
97 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
295 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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55 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
110 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
44 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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40 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
87 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
146 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
488 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
93 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
49 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
64 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
46 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
118 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
885 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
86 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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2answers
157 views

Is it a mistake in AD725 and other datasheets?

During my research of the RGB video and encoders I see two ways chip manufacturers/circuit designers treating the outputs (several examples below): AD725 (Analog devices): capacitor then resistor ...

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