Questions tagged [driver]
A chip or a circuit that sends a signal with more current or voltage, or over longer distances.
919
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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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2
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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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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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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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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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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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What vendors make anti-counterfeit drivers for USB-UART ICs?
In the USB-UART ICs field the best known warrior-with-counterfeit is FTDI with the FTDIgate-2014 and FTDIgate2.0-2016.
Do other vendors (like SiLabs, Prolific, Microchip, Cypress, MaxLinear or Nanjing ...
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Methods of calculating the turns of a DC electric motor
The motor shown in the picture will be used as a pump, its main task will be
to move the piston forward and backward. The result of its operation should be to push the air to a certain
value. ...
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Can a CD40110 start counting from 1?
I have a small assignment to made a century clock (which includes year, month, day, hour, minute, and second) without using a microcontroller.
I decided to use a CD40110 to drive a common-cathode 7-...
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How do I successfully transfer MIDI OUT signal to Windows 7 (32 bit) Desktop PC? [closed]
Things I have:
I have an old type MIDI input device (Piano Keyboard Panel) which has a MIDI "OUT" port (female type jack) that has 5 holes. (and no USB port). it has a 9V power input (AC ...
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Can someone explain point of TR1 and TR2 in the schematic? (Highlighted in picture)
How can there be 40V at the emitter of TR1 across C1 if the secondary of the transformer is 24V?
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Parallel Connection of ICs
Can I connect the outputs of the two Low-Side MOSFET Driver ICs, MIC4452, in parallel?
Any specific case/thing that I need to take care of?
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SEMIKRON: Effect of gate inductance on Eon (Switching losses)
I was reading the AN1403 "Determining Switching Losses of SEMIKRON IGBT modules" from SEMIKRON.
https://www.semikron.com/service-support/downloads/detail/semikron-application-note-...
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Minimum number of LEDs I can use with AL1791 LED Driver
I have a small LED lighting project and I plan to use an AL1791 (1-channel) LED driver.
Due to limited size, I will only use about 4 LEDs. Each LED has 2.2 V Vf.
My power source is 24 VDC.
Can an ...
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Selecting IC For Heater Power Control Circuit [closed]
I want to manually control a heater (DC Load) through a "power circuit" enabling one of MCU or FPGA IO. For my power circuit my intention to use an IC (switching regulator maybe) as safety ...
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Controlling MOSFET driver's input levels
I have a high-side MOSFET driver (MAX1614) that is used to power a device on and off. The /ON and /OFF pins of MAX1614 are connected to PCA9536 I2C-GPIO expander. The goal is to use a physical button ...
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Driving a lamp with low-side MOSFET
I have a circuit based on 555s that flashes a 12 V, 10 W lamp. I am using an IRF540 MOSFET to drive said lamp. I have the output of the 555 (12 V) pulsing (on/off) once per second. The drain is ...
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Discrete high-side driver for GaNFET
Background:
I am designing a buck/boost converter to convert back and forth between my supply voltage of 3.6 V (battery) and an output voltage of VDD = 60 V to bidirectionally drive a capacitive ...
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108
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Request for comments/critics on latching relay driver
I am a beginner in electronics and would like to request comments and critics for the following circuit I have designed:
The objective is to drive a two coils 12V bistable relay upon the state of a ...
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2
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103
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Can regular ON/OFF solenoid valves be turned into a proportional valve just by changing the control electronics?
I was wondering whether it was possible to make a proportional valve out of a regular ON/OFF solenoid valve by characterizing the current vs the flow rate and then driving the solenoid using a ...
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Shunt FET PWM best practices?
I am designing an LED driving circuit using an AL8861Y-13. Like any switching regulator, its PWM resolution/frequency are limited.
I want to do higher frequency and resolution, so I have opted for a ...
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131
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Should LVDS SerDes communication be with or without driver?
I have LVDS SerDes signals coming out from FPGA1 IO and have a few questions regarding the design.
My plan is to output the signals from the FPGA1 to a connector and from the connector a cable will be ...
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Need to change output voltage on MIC5891 driver
I have an LED control panel that uses the MIC5891 driver. I measured the VBB load voltage at 9.05 V, however, the outputs (1 through 8) all register at 1.96 V. What could be controlling this output ...
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127
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Reflected wave phenomenon - transient response and steady state of a transmission line
I'm currently trying to design a PWM driver for an impedance-mismatched long cable.
Sending rectangular pulses (rise-fall time ~0s) over a long cable that is not matched with its impedance results in ...
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3
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125
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WS2811 IC Supply Current
There are ten RGB LEDs and ten WS2811 ICs in my circuit. I'm trying to find out how much current the WS2811 IC draws from my 5 V supply.
No information about supply current is given in the datasheet. ...
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98
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What is the best way to drive a small coil digitally?
I have a coil of wire with about 40 mΩ worth of resistance for a hobby project. I would like to put up to 2 A through it. Ideally I would like to be able to choose how much current goes through it in ...
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Purpose of resistor in inrush current circuit for MIC2289C LED driver
I am looking to use the MIC2289C LED backlight driver from Microchip in a circuit and have a question about the unnamed resistor that connects to the FB pin of the driver and the cathode of the LED ...
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What's causing MOSFET driver failure in my coilgun circuit?
I'm working on a small coilgun, and am running into an extremely annoying problem with my circuit.
Circuit schematic:
PCB Layout:
Key components:
Flyback diode: BYC30X-600PSQ
Flyback resistor: ...
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2
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LM311 ZCD out to LM555 reset
I have no background in electrical engineering other than curiosity; I'm more of a copycat. I have been trying to reproduce this schematic:
I have searched the forum but don't see anything remotely ...
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2
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103
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Driver circuit for dual-coil relay
I have a dual-coil relay. The coils are rated at 12 V. The coils set (or reset) at 6 V, and require a pulse of between 15 and 100 milliseconds.
The relay is TE Connectivity, part # V23130-C2021-A412.
...
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Scan codes from PS/2 keyboard misbehaviors
In my quest to build my first CPU, I am trying to hook up a PS/2 keyboard to my FPGA. The keyboard is a Perixx PERIBOARD-409P.
After a bit of reading, I hooked up the keyboard to a scope to verify its ...
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105
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What's the function of this schematic? - Waveshare E-Paper driver
I am currently designing my own PCB which combines a microcontroller board and a Waveshare e-Paper driver board (Schematics). I wonder what the functionality of this part here is. Can anyone help me ...
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Do I need a pull-down resistor with this MOSFET-based motor driver?
I'm using the circuit in the picture to control a 12 V DC motor with an ESP32.
Do I need an extra pull-down resistor between the microcontroler pin and ground to avoid my pin floating and maybe ...
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OpAmp filter drive capabilities
My application requires a high input impedance. Therefore I am using 2 x TLV313 OpAmps as unity-gain buffers for my ADS1296. They also provide an adequate common-mode output voltage (2.5 V) for my ADC....
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Need 64Hz square wave green LED driver for a mosquito zapper
I have several 10 watt COB (Chip-on-Board) green LEDs which apparently are the best color to attract mosquitoes if driven at an ideal pulsing square wave frequency of 64 Hz.
I was going to use a ...
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How to translate a connection (Step Motor Driver)?
I am following this connection to get a driver to an Arduino and a step motor. The original connection is this:
Green wire --> Step
Blue wire --> DIR
Red wire --> +5V
My driver, However, has ...
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Power supply design requirements for IGBT driver
I'm trying to determine the proper power supply type and output current requirement to drive a three phase IGBT driver (this is a follow up to a previous question I asked, although focused on a ...
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To decouple or not to decouple these LEDs/drivers?
I am designing an aluminum PCB for some custom aquarium LEDs. I've done a lot of searching on mouser and read lots of data sheets for drivers that would suit my needs. Most of them have "typical ...
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Motor voltage spike
The circuit below is used as a relay in order to cut-off the common ground C- and Motor-.
In my system, the m otor driver (Motor+,Motor-) is connected in parallel with the supercapacitors (C+,C-.) ...
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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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Output resolution of PWM H bridge drivers such as L298N
I am working on a project which require a high resolution of the output signal of L298N or similar driver. Is it possible to control the output signal with a 1% resolution or better? What is the ...
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325
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AC LED driving circuit - How to drive low voltage LEDs?
I've been tearing down LED light bulb to see how they were driven and found out that most of them use this very simple circuit:
This is my understanding of the circuit:
220V AC Input (I'm un Europe)
...
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Need help to make a portable LED light based on the LM3421
I am trying to make a portable LED light based on the LM3421. I would like to use it in buck boost mode.
Input voltage from 4s battery-- 12 to 16.8
LED voltage - 14.4
LED current - 3A
PWM frequency ...
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