A chip or a circuit that sends a signal with more current or voltage, or over longer distances.

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12 views

Unidirectional motor control

I am interested in controlling the speed of multiple small DC motors that will draw at most 1 amp each. I only need to run them in one direction, so an H-bridge IC like the SN54410 seems like the ...
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1answer
17 views

Ramps 1.4 stepper motor Slaving

So I am looking to run 2 stepper motors for x and y axis with a ramps 1.4 board, but since their are only one stepper motor driver per axis i was wondering how to accomplish this? (I'm thinking a ...
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1answer
26 views

Choosing Stepper Motor - Driver Combination

This is my first attempt at designing/building my own circuit and PCB, so please bear with me. I am building a small, portable device that makes use of a small, accurate motor. My goal is to make the ...
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41 views

Building electrical exercise bike [on hold]

If any question like this was asked before, sorry. We intend to build an exercise bike with a brushless motor. Anyone will be able to adjust the difficulty of bike. It could be easier or harder to ...
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2answers
122 views

Pull up on output pin of Buffer SN74HCT245

I am using SN74HCT245 Buffer operating on VCC=3.3V. So, I am getting 3.3V at each output pin of buffer (B1 to B8). But if I want to drive a load with 5V input, what options are available to me by ...
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0answers
36 views

jlink This device cannot start. (Code 10) in win7 after update driver

I have one J-link ARM programmer, SO for first time i start it via KEIL software, and KEIL updated it's Driver, So after driver Updated , it's made crazy!!! and the led of its got down , so when i ...
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0answers
12 views

ILI9163C ili9163C Parallel 8 Bit Header & Function Prototypes

I'm using a NHD 1.8" display with the 9163 controller chip and looking for help getting bootstrapped to working with the display using a Sam3s...8 bit parallel communication. It is an inherited design ...
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1answer
59 views

what is this error in PSPICE with IR2113

I want drive a buck converter with bootstrap technique. but this circuit does not work!
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11 views

Driving LRA actuator with a driver

I'm using a driver DRV2605L to drive a LRA from the link below. https://catalog.precisionmicrodrives.com/order-parts/product/c10-100-10mm-linear-resonant-actuator-4mm-type The problem is that the ...
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1answer
57 views

How to convert Clock signal to PWM signal?

Let's say i have a clock signal which i control its frequency making it going from 10Hz to 1000Hz. And i want to convert this to PWM signal, so that 10Hz gives 0% duty cycle and 1000Hz gives 100% ...
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1answer
51 views

H-Bridge driver circuit design

I have built the following H-bridge driver circuit (The red resistors R9 and R10 were not included). However during testing I have found that I am constantly blowing the high side P-Channel MOSFETS ...
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1answer
34 views

how does this differential ddr receiver work?

I'm looking at this simple schematic trying to understand how a DDR SSTL receiver works (the one on the left). I get that the input voltage will be compared to Vref and the output will be a ...
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2answers
141 views

Which method is better for liquid crystal overdriving?

Recently, I started to design a LC (Liquid Crystal) shutter glass. The question is which component should I use. This is the LC shutter I might use: PolarSpeed®-S However, there are a few more ...
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0answers
29 views

When do you use a brushless motor driver and when do you use an ESC?

I'm trying to build a drone from scratch on my ARM microntroller on a Tiva C series development board. I know you need a motor driver(controller) to control a motor, but in the case of a brushless ...
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1answer
30 views

Two-terminal Connection High-Side MOSFET driver

So I'm trying to make a discrete device that functions the same as the highlighted portion of the diagram, which is taken from a Battery Management System chip. I understand that n-type FETs are ...
1
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1answer
37 views

Multi-plex 8 BLDC motors using shift registers?

I want to drive 8 tiny diskmotors - they look like low current motors. robotshop 2mm vibrating disks I want to drive perhaps 2 or three of them at a time with pulse-width modulation signals and I ...
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1answer
25 views

LED Driver LM3410X not functioning

I am testing below LED Driver Circuitry on breadboard using LM3410X. Input Specs: Vin & DMM = 5V, L = 20 uH R=2 Ohm Only thing is I have'nt connected LED ( I am testing with 10k resistor as ...
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1answer
96 views

Is it possible to sink and source from one output pin using a darlington driver

Sinking and sourcing with a darlington driver I asked a question about sinking and sourcing LEDs while using a darlington driver. The images were slightly unclear so i have redrawn it. I had too many ...
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47 views

Sinking and sourcing with a darlington driver

I was making my circuit with around 60 LEDs with a microcontroller when i realised that i didn't have enough voltage for all the LEDs. I am going to add a darlington driver on another board, so the ...
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0answers
28 views

Driving an OLED panel at high fps

Full-color OLED panels are easy to get, some of them come with no controller. So I wonder if I can implement a high speed(~1000fps@1000Hz) controller. My work is related to psychophysics experiments ...
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1answer
64 views

Interfacing thousands of RGB LEDs in a matrix

So I have 3072 RGB LEDs I need to connect in a matrix. I have decided to split the project into smaller matrices and all LEDs are common Anode. Datasheet for LEDs is here: ...
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2answers
2k views

How to drive 1080p with only 540 pins?

I was trying to hack a 3-D system starting from the monitor: VG248QE. I teared it down to LCD matrix and driver. This is a 1080p(1920 x 1080) monitor so I was expecting that at least 1080(row) + ...
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0answers
57 views

Problem with coil current on NEmA 17 stepper motor and chinese A4988 driver

Since my driver for CNC/3D printer blew up (my fault), I decided to make one on my own. I am using chinese made NEMA17 stepper motors with max current of 2A@2.2 V and 1.1 ohm coil resistance. I have ...
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1answer
36 views

Multiple laser diodes in series using a driver board

I couldn't find this in the search so I hope that I'm not repeating a question that's been asked already. I'm using a driver board that monitors the photodiode feedback in a laser diode to maintain ...
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3answers
125 views

MOSFET Driver Failure

I'm having trouble with TC4421A MOSFET drivers in a new PWM DC Heater design blowing. The 12V power supply used during testing is capable of 25A. While doing my initial testing, I started off with ...
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2answers
93 views

Driving 4 white LEDs independently

I'm trying to design an efficient circuit that is able to drive 4 independent (ie, connected in parallel) white LEDs and to control their intensity independently as well, through PWM. The thing is: ...
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2answers
36 views

Is it possible to do “runtime” routing/switching of current paths?

I am designing a project involving 12 DC motors, only one of which will run at any time. I will be using a high-current-capable H-bridge driver (like this one), in order to run them bidirectionally. ...
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2answers
146 views

Can LED Driver chips drive the LED with continuous ON DIMMING?

I am assigned with the design of a LED driver with 1 A current and 5 V system power. The customer wants to control all the LEDs with simple switches, nothing digital is involved. So I am thinking of ...
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3answers
54 views

How to interpret the stepper motor voltage requirement?

I have a 8HS11-0204S stepper motor and need to match a driver to it. HERE it says that the recommended voltage for driving it is 12-24V. But if you open the (feeble) DATASHEET, it says that the rated ...
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1answer
36 views

enable pins on RS422 drivers IC

I am using an IC which is an RS422 driver chip. There are 4 drivers in silicon and each can be enabled using a mux kind of enabling system. The screen shot is below - My doubt is - the input comes in ...
2
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1answer
65 views

stepper motor constant torque

Is there a way to keep a stepper motor pushing without a given rpm? I have a large stepper motor that I want to assist another motor with as much torque as it can. The other motor is a small 9hp ...
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1answer
165 views

Will relays work to switch between two circuits which power same LED string?

I have two power supplies that share the same load, an LED string. The one power supply (Circuit A) comes from the AC Mains which is rectified and with the help of a switching mode driver IC, it ...
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1answer
99 views

Voltage Regulation

I am a young engineer and I need a help from you. I need to design a driver circuit which must power-up a LED (OC) if the measured volatge is greater that 50V (Voltage to be measured can be upto ...
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2answers
65 views

Matching Stepper Motor to Driver

I am planning to purchase a CNC-ready mill from its manufacturer but put the controls together myself separately using various off-the-shelf components. The control system will be based on the Arduino ...
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2answers
73 views

Best Practice for driving a valve

For driving a valve based on the datasheet we should limit the max current that flow into the solenoid. If we have an AC valve we should take the inrush current at the start-up into account and ...
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2answers
124 views

DC Motor driver using MOSFET(IRFZ44N)

Hi, I am trying to drive a motor using a MOSFET(N-Channel). In my circuit I have connected an indicator for me to know if my mosfet is working. And it really does, but whenever I connect my dc ...
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1answer
122 views

Bipolar stepper motor driving by Micro-controller Xmega

I am using Bipolar stepper motor Haydon Kerk 25343-05. My driver IC is DRV8833. The micro controller I am using is ATXMEGA16A4U. The bipolar stepper motor has 4 wires. 4 PWM output pins of ...
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0answers
45 views

MRF24WG0MA driver

I have a working embedded design that connects to the internet using an ethernet connection. I'm using an MCU that has the Treck TCP/IP stack running on it, wich drives the RJ45 connector but now I ...
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1answer
96 views

How do I measure the output voltage of an RGB LED controller?

I want to replace an RGB LED controller (much like this one) with my own MCU. Therefore, I think I need to know what voltage(s) the RGB LED controller outputs so I can make my MCU/component have the ...
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1answer
81 views

Correct MOSFET choice for brushed DC motor [closed]

I'm looking for a few MOSFETs for a really small motor. This question is exactly what I am asking but I'm afraid this might be marked as a duplicate. Basically, I have really small motors rated more ...
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1answer
60 views

Can I use a stepper motor driver to control a brushed motor?

I'm doing a bit of shopping lately and I pretty much see stepper motor drivers everywhere, although I couldn't find any for brushed DC motors. I attempted to use a 2n2222 but it's probably a bad idea ...
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0answers
69 views

can't change LEDs states using PCA9685

I have a PCA9685 IC connected to i2c of cubieboard like board. Also OE pin is connected to one GPIO pin. I'm using ic2tools to communicate with PCA9685, I can ...
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1answer
60 views

Driver circuit not controllable, heating up

I have a driver circuit here. simulate this circuit – Schematic created using CircuitLab Current source below is an optocoupler. Problem is: Q2 is on regardless the state of the ...
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1answer
90 views

AVR and MOSFET gate resistor

I am driving a MOSFET with AVR using PWM for controlling a motor. I have a 4K7 pull-up resistor on the gate. My question is, do I need a resistor in between the AVR pin and the gate? (The mosfet is ...
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1answer
246 views

What does 'L' mean in the name of motor driver IC “L293D”?

i was wondering what the letter L in the name L293D stand for and what does it mean.
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2answers
109 views

Mosfet gate driving circuit

I saw couple of h-bridge circuits based on IR2184 driver that have following circuitry connecting driver and transistor: My circuit will be full h-bridge driver with load 20A 24V DC motor. I have ...
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1answer
79 views

Can I connect various LED fixtures to one driver?

Let's say my driver is 32W (700mA). I should be easily able to connect 5 x 5W 350/700mA LEDs right? My idea is to use driver with DALI interface and control 5 LED's using just one address.
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1answer
75 views

Controlling a 8A DC pump with a PIC

I need to activate a 12VDC, 8A diaphragm pump with the output of a PIC16F628 (5VDC, 0.025A maximum). The standard way to do it, as I learned in college, is to saturate a transistor that will drive a ...
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0answers
273 views

Monster moto shield + Arduino +Pololu 12V, 29:1 Gear Motor Encoder hardware problem

Overflow enthusiasts! I am trying to build a balancing robot with two wheels, using the polulu gear motor as mentioned above. In order to have a strong motor driver,the monster moto shield is used in ...
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2answers
545 views

Understanding this LM317 LED Driver circuit

I came across this simple LED Driver circuit ( I am aware of the power losses but just wanted to understand its working) . Now in a Voltage regulator configuration , ADJ is connected to a voltage ...