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

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15 views

Direct Torque Control of Induction Motor (DTC)

I was working on a project on how to design a classical Direct Torque Control drive DTC but there is a ceratin point that i can't understand. How can we calculate the Reference values of the torque ...
-3
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2answers
62 views

I want to design over voltage cut off circuit using mosfet [on hold]

I am trying to design a driver of 40W with nominal input voltage 230V , output voltage 50V , current 800mA. I need over voltage cut off circuit , i don't want ready-made SSR , supply should cut off ...
-4
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0answers
25 views

Emergency fpl circuit [closed]

Recently I have seen a emergency led fpl which turned on just with my hand touching on two sides. When I used wattmeter,it was still on in case the wattmeter has turned on or off.so if we use it at ...
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2answers
38 views

Drive a capacitance load with a very large output resistance analog voltage source

I have a signal source with a very high output resistance. The output of this source is connected to the input of comparator. Actually the input capacitance of comparator is not large (about 20fF). ...
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2answers
88 views

Why can a 74HC595 drive 8 LEDs?

I don't understand, I have seen many people use the 74HC595 to drive 5V across 8 5mm green LEDs via 220Ohm resistors at the same time, whereas the datasheet says that the maximum Vcc current is 70mA. ...
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1answer
61 views

High currents LED switcher circiut for WS2811?

I am making one High Amp for WS2811 RGB LED driver in range 2 Amp, SO base on it's Datasheet the driver working by this way: there are some switcher circuit similar to this : But this kind of ...
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1answer
34 views

specific driver and motor combination

I am planning to make a 3D printer for a school project and would be grateful for your help. I want to combine the following driver [L298N Dual H Bridge DC Motor Driver IC; Driven part of the terminal ...
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1answer
74 views

Push-pull configuration over single mosfet

I'm dealing with a simple application in which I need to drive a pure resistive load and to control it by voltage. I control the load through a pwm signal coming from a microcontroller in 5V logic. ...
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0answers
24 views

Piezomotor control

I'm trying to control a piezomotor, here is his datasheet, and drive it with the TMC261, however I've read that a piezomotor requires a sinusoidal wave so an DAC in indispensable but also I've found ...
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0answers
27 views

LED pulses with constant current driver

I am trying to drive two Nichia LEDs, the NC4W rated at 13.6V/1A. My supply is either a pack of 4 18650 cells in series (16V) or a DC DC boost converter rated at least at 100W. I tried a couple of ...
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0answers
17 views

drv8833 motor driver with lipo-2s problem

I am using a drv8833 motor driver for brush motor and i have one problem. When i'm connecting its VIN and GND to powerbank battery, brush motor to BOUT12 and BIN12 to atmega 328p, setting BIN1 to '1' ...
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0answers
24 views

Problems when dimming triac with load have large capactive

I'm make a circuit to dimmer a led light bulb base on zero point crossing detect. But I have a problem with load, the led light bulb using RC type power supply to drive a string of led series. I think ...
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0answers
52 views

Why has my constant current driver no voltage output?

I am trying to build a lamp from a 300mA/max. 20V constant current driver (the one left over from here) and two 350mA, 15-17V white LEDs. When I do not connect anything to the driver, I can measure ...
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2answers
75 views

mosfet driver uln2003

simulate this circuit – Schematic created using CircuitLab hi, in the above circuit, why wont the motor run? connecting the motor - to Drain of the mosfet and the motor starts spinning. ...
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2answers
118 views

Can I drive stepper motor with AC voltage? [closed]

I want to buy this motor SANYO DENKI 103H7823-1741 for building my CNC I have found the datasheet over here in the website that I will buy it from it says Motor: AC; stepper; 100VAC; step 1,8°; ...
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1answer
61 views

What is an acceptable temperature rise for a Mosfet?

I will be using driving N-channel Mosfets with 5v PWM to switch 24v 2A(per channel) LED strips. I will use four per strip (RGBW) and have 6 strips, totalling 24 Mosfets on the PCB. I am looking at ...
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1answer
78 views

What is the type of this legacy motor and how is it supposed to be controlled?

A friend of mine is going to give me an old Dayton 8F047 which I would like to recycle, but it is now obsolete and I cannot find anything other than a schematic which is reproduced below. ...
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0answers
77 views

PN2222 as MOSFET (IRF3205) driver for 25kHz PWM

simulate this circuit – Schematic created using CircuitLab As far as I know, you calculate a transistor as a switch like this: Look for \$h_{FE}\$ Not the saturation \$h_{FE}\$ because ...
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0answers
30 views

Half bridge mosfet drivers

Hello I'm trying to make a DC-DC converter and I need to drive 2 mosfets using the folowing half bridge driver : http://docs-europe.electrocomponents.com/webdocs/0b3c/0900766b80b3c1b2.pdf Mosfet : ...
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1answer
74 views

Calculate Current Regulation - DRV8825

I am driving a bipolar hybrid stepper motor rated 1A with a DRV8825 at 12 V. About current regulation the datasheet says: 9.2.2.2 Current Regulation In a stepper motor, the set full-scale ...
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2answers
61 views

How to control a capacitive load using an Arduino Uno

I'm trying to control a liquid lens using an Arduino Uno, however, the lens driver I've been attempting to get hold of is no longer an option. The lens needs up to 60Vrms in order to function, and ...
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1answer
75 views

Stepper motor going one step forward and one backward

I have DRV8825 driver wired like that: And I'm sending high and low signal in loop. Each 2 high signals motor moves one step. And it moves forward then next step backward. Yes, I've tried to switch ...
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1answer
44 views

No HO pulse on IR2184 in half h-bridge

I am unable to get any output on HO pin of IR2184 high side gate driver when I tried to drive a half H bridge. Vcc is around 12-15V, input to IC is around 8V square wave, bootstrap capacitor voltage ...
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1answer
70 views

How to switch micro DC motors fast?

i'm planning to make micro/nano quadcopter and ive bought all major components so far. Only thing that i cant figure out are motor drivers. I was planning to use some kind of transistor to do that for ...
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4answers
200 views

10 Watt LED and LED Driver related question

I got a 10watt LED from Ebay but never thought that the driver and heat sinks are must-haves for this little master. When googled, I found several circuits of LED driver. But none of them are ...
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2answers
72 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
108 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
51 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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2answers
168 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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1answer
96 views

what is this error in PSPICE with IR2113 [closed]

I want drive a buck converter with bootstrap technique. but this circuit does not work!
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0answers
15 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
84 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
103 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 ...
3
votes
1answer
47 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
157 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
43 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
44 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
43 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 ...
0
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1answer
29 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
114 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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0answers
54 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 ...
0
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1answer
75 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: ...
14
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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
149 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 ...
1
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1answer
54 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 ...
3
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3answers
212 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
101 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
39 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
166 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
80 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 ...