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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20 views

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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90 views

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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1answer
84 views

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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54 views

light LED panel symbole meaning

Please if anyone know what does mean this symbole.
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1answer
42 views

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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968 views

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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48 views

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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1answer
38 views

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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1answer
77 views

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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1answer
39 views

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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1answer
66 views

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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1answer
63 views

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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1answer
57 views

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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3answers
72 views

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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1answer
41 views

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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3answers
42 views

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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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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1answer
60 views

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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1answer
22 views

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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3answers
79 views

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 ...
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1answer
77 views

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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5answers
197 views

Relay coil fast demagnetisation

In the past few days, I've encountered an application note on the Maxim Integrated website about rapid demagnetisation of an inductive load: https://www.maximintegrated.com/en/design/technical-...
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2answers
105 views

How are such ICs called ? (Level-shifter + CMOS push-pull driver)

A lot of times I need a circuit like below. Namely, a logic level signal should set a higher voltage (e.g. 12 V) and higher current (few 100 mA, but not Amps) push-pull stage to a hi/lo state at ...
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1answer
48 views

Using LM358 and TIP 122 in a circuit as a constant current driver

I have been working on the constant current driver for a valve. Please find the circuit screenshot below. I am able to observe only 10 mA at the junction where the valve has to be connected. According ...
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1answer
54 views

Why is my Multivib piezo atomizer/transducer driver not working?

I'm tying to drive a "Moisturizing Transducer Mist Maker Atomizer Film Plate" using a simple astable multivibrator circuit like this: I can't make it work. No reaction from the atomizer. I ...
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3answers
78 views

Decoding and connetting a keyboard PCB [closed]

I want to build a laptop from a raspberry-pi and an old "toy laptop" (and new components), the spare toy laptop I have is a Oregon Scientific Batman BL31T. I would like to use its case and ...
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1answer
58 views

Is designing a PCB for the A4989 driver as simple as the application diagram seems to suggest?

Datasheet It looks like it just needs an MCU for logic supply, step and direction plus another higher voltage supply; that, along with eight external FETs. Is there a more detailed guide somewhere on ...
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2answers
660 views

Russian к2лн641 VFD (Vacuum Fluorescent Display) driver pin out help

I have recently acquired some IV-3 VFDs (Vacuum Fluorescent Displays) and they came on an old PCB with drivers. The driver is a к2лн641 and have found a datasheet on it with some information, but it ...
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2answers
124 views

Driving an LCD backlight using a PNP transistor

I'm trying to turn on/off the backlight of this LCD for the power saving when my ESP8266 goes to deep sleep. Because the ESP8266 has a maximum output current of 12mA and the LCD needs a current about ...
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1answer
78 views

LCD with PCF8574 I2C driver doesn't work on frequencies lower than 2 MHz (STM32F103 Bluepill)

I am working on a low power project using the STM32 "Bluepill" and I would like to use an LCD without the need to set the frequency for the HCLK (Core Clock) to anything beyond 500 kHz. ...
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2answers
142 views

Gate driving loss and gate driver for Buck

I have the following question regarding gate driving loss in a synchronous Buck. When we want to turn on HS or LS we have to charge their input capacitance \$C_{\text{iss}}\$. This is done through a ...
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4answers
203 views

How to generate opposing outputs at 24V from 3.3V control signal

We have a set of 4 control signals at 3.3V. For each of these control signals, we want to generate a pair of output signals. For example, if \$control_1\$ is high, then \$out_1\$ is 24V and \$out_1inv\...
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1answer
95 views

Class E Amplifier Overshooting

I'm having issues getting a Class E Amplifier to work properly. I designed the amplifier based off of Nathan Sokal's paper titled "Class-E RF power amplifier" https://people.physics.anu.edu....
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1answer
115 views

Is this a correct 'Bare metal' motor driver? [closed]

I need to make a simple motor driver, I'm using a IRF510 and I wonder to know if this could work. The circuit - falstad simulation UPDATE I added the freewhelling diode as recommended by Tony Stewart ...
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1answer
82 views

Schematic review of 7x7x7 LED cube driver circuit

I previously made a 5x5x5 LED cube using TPIC6b595 shift registers. I soldered all the components on a perfboard which was rather messy. I now want to increase the size of the cube to 7x7x7 and adjust ...
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26 views

What is the definition of ILac in following diagram and calculations?

The attached diagram and calculations refer to following application note: AN2761 Application note Solution for designing a transition mode PFC preregulator with the L6562A I don't have any idea about ...
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64 views

MOSFET driver IR2101 output (HO) stays high

I am trying to make BLDC driver with IR2101. MOSFETs I am using are IRFB4110PBF. So for testing I am currently using one pair. I am using oscilloscope to see the output waveform. What I see is that it ...
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2answers
222 views

What's the difference between the D and DTR parts?

Is DTR just the same as D which is packaged in tape and reel? If so, was it really necessary to categorize them like this?
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3answers
134 views

Is the LED driver output voltage AC or DC?

My LED driver output voltage is 150VDC: It is also 322VAC: I checked it with two multimeters. The input voltage is 237VAC.
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19 views

CML pre driver tail node voltage

Please consider the following schematic. I want to understand the V(A) waveform, when D+ & D- are switching. My understanding is that during the switch, we will have overshoot on V(A), because ...
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1answer
96 views

LED driver not responsive

I've got a number of HEF4794 BP LED drivers (8-stage shift-and-store register LED driver) daisy-chained together to drive LEDs from a microcontroller. The outputs of the drivers are connected to a ...
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107 views

ULN2803A Relay Driving Circuit from ESP-12E through PCF8574

I am designing a circuit which will drive 4 relays & 2 LEDs from 4 push buttons(for each relay) with ESP-12E via (I2C) IO expander PCF8574 as I need more IO's than what are usable(stable) on ESP-...
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1answer
43 views

Multi led drivers: power line voltage increases after leds switch off

I realized 4 boards from the circuit in attached file based on the HV9961 a constant current led driver controller: http://ww1.microchip.com/downloads/en/devicedoc/20005588a.pdf. Each stage, powered ...
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1answer
72 views

differential ADC driver, buffer vs non-inverting amplifier with low pass filter

I am designing an ADC driver (20-bit differential ADC) with an input signal range from 0-10kHz, sampled at 1Msps and with 1 LSB of 47uV. I choose 1Msps rate for oversampling factor of 10. Referring to ...
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Is it possible to use a Limiting Modulator Driver as an amplifier?

The MTC5525 is basically a Limiting Modulator Driver for driving LiNbO3 modulators, which for me, says nothing, even after googling for 1 hour. But the seller says it can be used as a power amplifier. ...
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32 views

Motor driver current sense does not have the same shape as the sensed current (DRV8874 current mirror)

I am using 3x DRV8874 motor drivers to drive the 3 windings of a brushless AC motor (OUT1 of each motor driver to each winding, such that the current sensed by each driver is not a combination of ...
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1answer
64 views

Multi "Master "Coaxial Driver Design

I have an application which requires sending PAL video signal & UART infomation over a 50R coaxial cable without disrupting the PAL protocol while doing it, the total length of the cable is around ...
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0answers
34 views

Driver output to FET gate voltage - rise & fall time

I have an ISO driver with the following params: Peak source current = 4 A, Peak sink current = 6 A, Sink resistance = 0.55 ohm, source resistance = 5 ohm. How do I calculate the time between the rise/...
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2answers
275 views

Which one would be better for 3.3V outputs among ULN2001 and ULN2003?

I intend on driving 24VDC relays with darlington arrays of the ULN200X series. Since the darlingtons will be driven by a 3.3VDC outputs I am hesitating on whether I should choose ULN2003 or ULN2001. ...

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