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

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16 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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7 views

programming attiny88 & attiny828 with arduino [migrated]

I found some information that the attiny88 and attiny828 can be programed from an arduino, similar to the programing of the attiny85/45, simply connecting the right pins. How to program Atmel ATtiny88 ...
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2answers
53 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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0answers
47 views

Driver development for USB [closed]

I have been reading a lot of stuff and I am confused now. I have a microcontroller board with a USB port. It has an ARM core too, I want to develop the driver code to read and write the contents of ...
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1answer
37 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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26 views

Writing 64-bit driver for BCD2000? [migrated]

I want to write 64bit driver for Behringer BCD2000 DJ controller, because it doesn't exist on Behringer official site, and I have a few questions about this topic. From where to start when writing ...
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31 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 ...
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1answer
39 views

h drive for stepper motor

I am having a problem trying to find the right h-drive for my nema stepper motor. It's rated for 3.08V and 2.8amps. Unfortunately, I can't find an H-drive that will accommodate. They are either too ...
3
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1answer
100 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: ...
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1answer
101 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 ...
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1answer
57 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
45 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
397 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 ...
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1answer
82 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
74 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
33 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. ...
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1answer
60 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 ...
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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 ...
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3answers
91 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 ...
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1answer
129 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
88 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 ...
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1answer
57 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 ...
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1answer
64 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 ...
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0answers
21 views

H-Bridge driver misfiring and referenced to >VCOM?

Circuit below. Circuit is a full-bridge with IR2183 drivers being operated at 12V. Measurements were taken with reference to GND at JC2. Hey, take a look at this stuff, HIGH SIDE IN RED, LOW SIDE IN ...
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1answer
72 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 ...
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0answers
84 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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3answers
59 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 ...
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0answers
23 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 ...
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1answer
112 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 ...
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1answer
55 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 ...
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1answer
60 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 ...
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1answer
109 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 ...
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2answers
71 views

Inrush Current Booster

I probably need help more with terminology (and thus, how to find the answer that already exists) than with technology. My current hobby project is a low-power device — max current is 100mA at 5V* — ...
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1answer
51 views

Zener diode in stepper motor driver with TPL7407L

In TPL7407L's datasheet, there is a stepper motor driver schematic as below There is a zener diode denoted as "optional". However the 'COM' pin is connected to 'VSUP' directly. The 'optional' means ...
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0answers
55 views

driver for 3 x 30 watt leds in series

I am trying to build a lamp using 3 x 30 watt led, a heatsink and hook them up in series to a driver. I have 220 volts outlet (Europe). I am a newbie in electronics Can someone help me choose a right ...
0
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1answer
62 views

Timed Infrared or Infrared PWM Signals

We are trying to have a moving IR receiver pickup a specific IR-led for a range of IR-LEDs. The options we're looking at : Send and unique pwm signal from each different led, the moving object ...
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1answer
60 views

Trying to power a 100-watt Cree Xpe array as efficiently as possible with dimming

I've recently purchased a 100-watt Cree 30-module XPE multichip ...
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0answers
103 views

Can I connect my Innolux screen to Raspberry Pi 2 using TFP401 HDMI/DVI Decoder to 40-Pin TTL Breakout

Setup Raspberry Pi 2 TFP401 HDMI/DVI Decoder to 40-Pin TTL Breakout - Without Touch Innolux 5.6 LCM aSi TFT type LCD I am hoping to be able to connect the Pi2 to the Driver using a small HDMI ...
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1answer
54 views

Another DIY Led Question (Complete Newcomer)…sorry

I have 10 Bridgelux leds (forward voltage 3.5 to 4.5v, drawing 750ma max). I also have a 36v Mean Well HLG Driver, offering 1.12a. It seems to me that trying to run all 10 leds (in series) is ...
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1answer
52 views

Relay driver circuit with input referenced to positive

I built a standard relay driver circuit as shown in the first schematic here: It works as expected, but I now realized my input is between the positive terminal instead of ground. How can I adjust ...
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2answers
227 views

SPI Troubleshooting, Teensy, Arduino, and tri-state

I'm trying to get my SPI bus devices up and running on a custom circuit board that I've soldered together. Unfortunately, I neglected to add probe testing spots on this particular circuit board, and ...
3
votes
1answer
60 views

How to deal with analog pin drivers with output switching?

I'm trying to figure out if there's any way to affordably improve the performance of an analog pin driver that needs to be periodically isolated from its load, for the duration of self-calibration. ...
2
votes
3answers
76 views

Courses about deploying Linux on embedded systems

I am a new grad student in EE and am trying to take full advantage of my time here at the uni. I have always wanted to understand how to get Linux running on embedded platforms, but from the outside ...
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0answers
20 views

Individual Control of 4 DC Motors with 1 Motor Driver

I am trying to control 4 DC Motors with a position feedback signal, with access to only one of manufacturer's motor control driver boards. Since I don't need simultaneous control over all of them, I ...
0
votes
1answer
53 views

Minimize Current Sensing Loss in LED Driver

Design voltages and currents: Vo = 100V. Iout = 50mA. Po = 5W. R4 is the output current sense resistor. The reference voltage for the error amplifier is 2.5 V which implies that under the target ...
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1answer
85 views

High Power LED connected to Dry battery

I am new to electronics as i love working with circuits. I have 12V 6W SMD LED, which I want to attach with Battery Powered Driver which currently gives me from 10v-14v DC with 50mAmp. Shall I connect ...
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0answers
98 views

Discrete logic multiplexer

I posted a more in-depth outline of what I'm doing here, but basically I'm building this circuit (for n=3): The circuit displays an output based on the combination of three three-input DIP ...
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1answer
137 views

IRF540 power Mosfet 12 volt motor gate resistance

I have a IRF540 power Mosfet driving a 12 volt motor. Currently I am using a 100 ohm gate input resistor, It is working fine. What I want is the maximum gate resistor value that I can use and still ...
6
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4answers
691 views

Multiplexing a Circuit

Frankly, I'm overwhelmed with this circuit that I have to start building in lab tomorrow. Last week we built an octal decoder that takes a 3-bit binary input from 000 to 111 and displays a unique ...
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votes
2answers
47 views

How to use Max3795 for driving VCSEL at 100 MHz?

i am trying to drive my OPV380 see datasheet( http://optekinc.com/datasheets/OPV380.pdf) with a square wave data at 100 MHz. i am using now a Max3795 ...