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

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65 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
25 views

Correct MOSFET choice for brushed DC motor

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
27 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
14 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 ...
0
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1answer
47 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 ...
2
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1answer
53 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
90 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
52 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
43 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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0answers
15 views

Arduino Nano with Mac OS Yosemite 10.10 [migrated]

I have an Arduino Nano and i’m trying to use it with the Mac OS Yosemite (10.10). However, I’m having issues with the data transfer between the computer and the device. The Arduino is powered (LED is ...
2
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1answer
59 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
82 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 ...
2
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2answers
216 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 ...
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1answer
23 views

Bldc motor driver compability

I looking for a drive for my sensorless bldc motor for a project of mine. 1)Will I be able to drive my motor with ESC(electronic speed controllers) used to RC hobbyist powered by Smps. 2)what are ...
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1answer
46 views

Trouble splitting off LFO signal to drive LED

Background: I am trying to build a very simple noise box that doesn't need to be tuned to 1V/Oct or anything special. It simply has one VCO, two LFOs, and a VCA. The circuit is powered off of a dual ...
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1answer
28 views

What kind of driver should I implement in buck convertors

I have a couple of questions. In the diagram below, when the current falls to 0 , the NMOS is supposed to turn off. Similarly when the voltage error increase the PMOS turns off. However in the diagram ...
0
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1answer
51 views

step down switching frequency

If I have a power supply that outputs 32V,7A and I need to power an LED that requires 24V-2.8A, can i use this step-down module to power up the LED? ...
0
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1answer
22 views

TLC5916-Q1 LED Driver Serial interface

I am planning to use TLC5916-Q1 LED Driver for switching of 8 different color led's and in application,switching takes place at fast rate. Datasheet: http://www.ti.com/product/TLC5916-Q1 For ...
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1answer
46 views

Best way to regulate high voltage

I am currently working on a motor driver that should operate on 100V or higher voltages. I need to implement logic there with 3.3V. I could provide additional, low voltage source but that would give ...
1
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1answer
54 views

Brightness control with PWM dimming LED driver LM3406/06HV

I have an changing input voltage. I would like to feed it into LM3406 and have varying brightness from the Led. So I go through the datasheet. However,the only information and characteristic of the ...
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0answers
44 views

Battery powering two LED's with a led driver

Currently I am working on an application that is battery powered. I have two reflective sensors (RPR220 and RPR220-PC30N) which I am comparing to eachother. As a power supply I use 4 AA none ...
0
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1answer
57 views

CXA1512 LED CC/CV driver design?

Any help would be appreciated as I am new to LED drivers. I have a very basic understanding of electronics and I'm not up to designing my own driver yet. I have tried to power this LED with a ...
-3
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1answer
114 views

Make an opamp go rail-to-rail on a voltage higher than opamp supply

So I've chosen to work with an High Frequency Opamp that can only use 5V for power (I can't use any other Opamp). But I need the signals to go Rail-to-rail at say, 24V. So naturally I thought I'd just ...
2
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0answers
34 views

Laser diode driver at high currents

I have a fiber array package laser diode which draws 30A at 2.8V. I would like to use it in a laser cutter project, but I don't know how to go about designing a power supply for it. I came up with ...
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2answers
109 views

determine necessary current to drive a stepper motor?

I am trying to drive a stepper motor. It is a 12V unipolar motor. But it is not moving. I tried with L293D , ULN2003 etc. I think it is not getting sufficient current. But how do I determine how much ...
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1answer
38 views

Are drivers and libraries the same?

Can driver for some device (for example LCD display), also be called library (a set of functions for work with)? If not what is the difference, and what term is used for what?
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0answers
40 views

PIC 18F23k20 as LCD driver

I was asked to devise an LCD driver using a PIC18f. Here's some information on what I'm using. PIC 18f23k20 LCD-S401M16KR-81359 It's a 1/3 bias 4 common multiplexed 7-segment display. I have the ...
3
votes
1answer
121 views

How do I find out which current/voltage to use for an unlabelled LED panel?

I have a 600mm x 600mm LED panel with 576pcs 3014-type SMD LEDs in some unknown configuration/topology (edge-lit, similar to this one here: ...
0
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1answer
111 views

Visible light communication LED driver

I want to do "RC current shaping circuit" on LED for predistortion,but I don't know how to calculate "R" and "C",because I measure the Voltage waveform across a LED doesn't have this waveform,so I ...
0
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1answer
59 views

Help me clarify this really unclear diagram?

5.2 Reduce control IC exposure 2a. Connect VS and COM as shown in Figure 6. http://www.irf.com/technical-info/appnotes/an-978.pdf (H-bridge application notes) Do they want me to connect ...
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2answers
138 views

High power led driver for COB leds

I bought some chinese COB 100W Led lamps from Ebay and I was wondering what would be the most efficient way to power them. Led specifications: 24vDC 4.2A I want to use 4 leds in total, so that makes ...
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3answers
418 views

Light LED light?

I would like to mount 10 or 20 white LED on a thin rod, about 2 m long - and around 3 mm in diameter. I will need to accept various compromises for conflicting requirements, but I try to understand ...
0
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1answer
95 views

why my LEDs burned with the right driver?

I am trying to connect, in parallel, 18 LEDs that have these specs: LED size: 10mm; Voltage: 3.2V - 3.4V; Current: 20mA. Driver Type/Model: MeanWell LPC-20-350 (datasheet: ...
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1answer
123 views

Arduino LED Cube 8x8x8 with a Led Driver (TLC5940NT )

Me and a group of friends need to make a college project and decided to do a LED cube that can graph mathematical functions. We do not know how to code very well, and are very new to Electrical ...
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2answers
37 views

Hi Drive MOSFET waveform for charge controller

I have designed a charge controller using the BQ24650 IC from Texas Instruments. Although I am outputting the correct voltage, the hi drive waveform is not the square-shaped waveform I was expecting. ...
1
vote
1answer
75 views

Drive 8 Stepper motor simultaneous with different motion?

I have the need to drive 8 stepper motor together and with different motion behavior for each. Could I just get away with 8 stepper control board (easy driver) + an Arduino with enough pin to get the ...
0
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1answer
24 views

Loading new drivers

Suppose I'd like to make changes to the drivers of ADXL345 for SPI by building on https://github.com/analogdevicesinc/no-OS/tree/master/drivers/ADXL345 How should the updated drivers be loaded? Should ...
0
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3answers
112 views

Op-Amp based guitar direct box

I successfully built an active DI box using this circuit (image posted below), everything went fine and I'm happy of the result. Parts List ...
0
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1answer
193 views

BLDC motor waveforms

I'm trying to drive a brushless motor (BLDC) with an ATMEGA328p I use Timer0/1/2 to generate 3 different PWMs @ 62Khz. First I tried (only absolute values) $$A = \sin(T)$$ $$B = \sin\left(T + ...
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2answers
95 views

Led's in series light power degradation with strange results

I am doing life cycle test for 7 led's connected in series with current limiting resistor.(picture for reference) I am measuring light power(mW) with Thorlabs photo resistor for each led. Led's ...
0
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1answer
71 views

Transistor based relay driver for DC motor is not working with 12V-8A DC motor?

I am trying to run a 12V-8A DC motor from pic microcontroller output pin via relays(28V-30A output rating). It only starts for a split second and stops. Where as small DC motor runs perfectly on the ...
1
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1answer
72 views

Why is this a bad MOSFET/Driver for a Tesla Coil, what does one look for in a good one?

MOSFET: http://ixdev.ixys.com/DataSheet/99175.pdf Driver: http://www.irf.com/product-info/datasheets/data/ir2183.pdf What factors should one consider in selecting a good MOSFET/Driver combo, and ...
1
vote
1answer
108 views

Drive stepper motor with audio amplifier?

I am as a beginner in electronics contemplating how to build a motor driver for a stepper motor. From what I have read, the more sophisticated drivers will have a feature known as micro stepping ...
0
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0answers
106 views

looking for 300mA cree led driver circuit

I need help or need basic circuit of cree LED driver with the following info: Voltage input: 12v Output : 3.3v at 300mA Thanks for any help.
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votes
3answers
73 views

IR LED for night vision LED driver necessary?

I am working on a project that requires a night vision camera. I have a small camera placed on the PCB and 4 IR LEDs placed around it to illuminate the dark room. The rooms are about 20-30qm. I have ...
0
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0answers
28 views

Triggering Problem in 100W LED driver

Why a triggering problem, 100 Watt Driver(volts @ 3ampers), instantly it switches On, but once it is off again it wont switch on.Why does this happens in a led driver. Is this due to capacitors ...
0
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1answer
140 views

Help with building a 3 Phase DC Motor Controller

I'm looking to design the power stage of a 3 Phase DC Motor Controller for use with the Emrax 268 motor. The maximum input battery voltage would be no higher than 300VDC and the maximum continuous ...
1
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1answer
67 views

5v dc drops to 2v when applied to L293d [duplicate]

I have a 5v dc supply generated from voltage divider and this 5v is used to drive L293d. But the problem is as soon as 5v supply is given to L293d the voltage drops to less than 2v. what could be ...
0
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1answer
75 views

Fail Safe for circuit, when input is removed

I have built a circuit which inverts the signal of a ULN2003A, it is in turn connected to a relay. It is possible for the ULN2003A output to be disconnected from the external circuit as it is remote ...
0
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1answer
128 views

Buck converter not working

I designed a buck converter on breadboard as shown in the picture. I am applying PWM from my microcontroller. I am not sure why this circuit is not working, I have spent so much time on it. Is there ...