A chip or a circuit that sends a signal with more current or voltage, or over longer distances.
0
votes
0answers
24 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 ...
0
votes
0answers
12 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' ...
0
votes
0answers
21 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 ...
0
votes
0answers
49 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 ...
0
votes
2answers
61 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.
...
1
vote
2answers
110 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°; ...
-2
votes
1answer
60 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 ...
1
vote
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.
...
0
votes
0answers
55 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 ...
0
votes
0answers
25 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 : ...
0
votes
1answer
62 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 ...
1
vote
2answers
58 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 ...
0
votes
1answer
73 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 ...
0
votes
1answer
36 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 ...
-1
votes
1answer
66 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 ...
0
votes
4answers
139 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 ...
0
votes
2answers
70 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 ...
0
votes
1answer
78 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 ...
0
votes
1answer
48 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 ...
1
vote
2answers
149 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 ...
-2
votes
1answer
86 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!
0
votes
0answers
13 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 ...
0
votes
1answer
73 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% ...
0
votes
1answer
99 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
42 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 ...
1
vote
2answers
154 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 ...
1
vote
0answers
40 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 ...
0
votes
1answer
38 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
vote
1answer
41 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
votes
1answer
28 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 ...
0
votes
1answer
108 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 ...
0
votes
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
votes
1answer
71 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
votes
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) + ...
0
votes
0answers
114 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 [email protected] V and 1.1 ohm coil resistance. I have ...
1
vote
1answer
48 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
votes
3answers
192 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 ...
1
vote
2answers
100 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: ...
1
vote
2answers
38 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.
...
1
vote
2answers
157 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 ...
1
vote
3answers
71 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 ...
0
votes
1answer
44 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
votes
1answer
71 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 ...
1
vote
1answer
236 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 ...
3
votes
1answer
100 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 ...
0
votes
2answers
97 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 ...
0
votes
2answers
77 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 ...
0
votes
2answers
183 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 ...
0
votes
1answer
139 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 ...
1
vote
0answers
55 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 ...
