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

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1answer
48 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 ...
0
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0answers
5 views

STEPPER MOTOR CONTROLLER Using LEONARDO PRO MICRO [migrated]

I want to Use LEONARDO PRO MICRO and A4988 Stepper Motor DRIVER to control Nema 17 Stepper Motor. Please let me know how to hookup these together. Please give me a circuit for this type of ...
1
vote
0answers
48 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 ...
0
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1answer
47 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
votes
4answers
493 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 ...
-2
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0answers
9 views

error code 10 for arduino device driver [migrated]

How to fix error code 10 while installing device driver for arduino in windows 8.1? The LED on the board is blinking after connecting it to the laptop.so i don't think so that the board is damaged.
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0answers
34 views

Interfacing a PS2 controller with PC

I was wondering how can I interface a PS2 controller to a PC via USB. What are my options to do so? will the buttons be read as a keyboard strokes ( can the controller buttons be mapped to keyboard ...
-1
votes
2answers
27 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 ...
-1
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0answers
53 views

Motor driver PWM not working?

I have two Motor Driver L298N dual H-bridge, i have each ENABLEA and ENABLEB from both drivers share a PWM pin in the ARduino uno board like so: ...
-1
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0answers
48 views

porting a linux driver to PIC

alright, basically, i want to use a SnadPIC, a 32-bit PIC MCU with OTG powered board (http://easypickit.weebly.com/) to interface with RTL8188SU, a single chip implementing 802.11gb/g/n, with ...
1
vote
1answer
97 views

How to install Altera USB master driver for Windows 8 (64 bit)?

I am trying to connect Altera Stratix 4 board with my PC in which Quartus 11.0 is per-installed. But my PC is not detecting USB JTAG connection from the board. What I am guessing is that, this ...
1
vote
2answers
140 views

LED glowing when the driver's ground is cut off

I made a simple circuit with a premade LED driver (Recom RCD-24-0.35), analog-dimmed by a MCP4921 DAC, which is controlled by a 3.3V microcontroller board. You can see the schematic below, Q1 is ...
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vote
2answers
80 views

3.1 volt 400 mA laser driver

I've done quite a bit of searching here and on Google, but I think I still need help. Using either of these power supplies: 12V 1A or 5V 2A How can I build a circuit to drive a laser diode with ...
0
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0answers
41 views

Current spikes when driving stepper motors

I am trying to figure out appropriate values for a timeout mechanism provided by the DRV8811 stepper motor driver. While doing my research I came across a website that conveniently has a write-up ...
1
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1answer
33 views

Unified Driver model for low speed and high speed microcontrollers with limited and good memory

I am trying to develop an experimental RTOS. I am stuck in the driver layer design. I want to make the driver layer libraries friendly for the other layers but then again I would like to have high ...
0
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2answers
40 views

When a datasheet specifies output current is it per pin or aggregated for all pins?

When a datasheet specifies something like output current, as with the 74FCT244 or for example, is this referring to the aggregated output current between all pins or the capacity of a single pin ? ...
0
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1answer
31 views

clock drivers low current consumption

I am trying to drive a 30 pF load cap (1 pF times 30 or 2pF times 15 or so on) from a ring oscillator generated clock. The frequency I want is 250 Mhz. What is the best approach to keep the input ...
0
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2answers
90 views

How to reduce current

I need help reducing current in my motor driver. The chip is the L293D motor driver with output max 600mA. My stepper motors draw maximum 350mA per phase and operate at 12V, so I am concerned about ...
0
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1answer
55 views

Fan Control using Motor Driver, looking for suitable solutions

I want to control the speed of a fan (which is a 2-phase brushless DC motor). I am currently using a suitable power supply to run the fans. My source is a Data Acquisition device that outputs up to ...
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votes
3answers
89 views

LSM9DS0 driver for MSP430

I am working on a project to interface LSM9DS0 with a MSP430. Looking for a driver in C / C++ that I can use as a reference design.
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votes
1answer
36 views

Turn Stepper Motor Off when Idle

I was wondering if there is a way to cut power to my stepper motor when it is not in use. I dont particularlily need it to hold its position because in my setup it doesnt really need to torque agaisnt ...
1
vote
3answers
176 views

Does running parallel circuits for LEDs decrease their output?

Sorry if the questions here are elementary but my electrical knowledge is limited. I am planning to build an aquarium light fixture and I am having trouble grasping how to best use a driver. The ...
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2answers
115 views

Limit drawn current but not voltage (LED driver for 100W LED)

So I have serial connected 8 LiPo's with corresponding controllers to monitor the battery pack. Now, they deliver 32 volts which is precisely what I need but they deliver way to much amperage compared ...
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2answers
68 views

share eletromechanical buzzer between 2 mcu's?

I'm trying to 'share' a buzzer between 2 separate mcu's, one is on a multirotor flight controller (STM32 or Atmega328), the other is a module I'm adding that needs to use the same buzzer. diagram: ...
0
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0answers
36 views

Designing a motor driver for my robot

I'm new to electronics and i have a task at hand : to design a motor driver board for my turtlebot(an open source robot) . Having said that , im using a johnson gear side shaft motor that draws at max ...
5
votes
2answers
178 views

Voltage spikes when driving DC motor with N-channel MOSFET

I'm trying to drive a DC motor (12V, 100W) with MOSFET IRFP054N. PWM frequency is 25 kHz. Here's the schematic: I know DSEI120-12A is not the best diode for this but I don't have any better right ...
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1answer
125 views
0
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1answer
47 views

Connecting two DC motors on a single driver channel

Is it a good idea to connect two DC motors on a single driver channel? Here are the motor specs: Operating Range: 6 - 12VDC · No load current: 40mA (6VDC) · No load current: 70mA (12VDC) · ...
0
votes
1answer
42 views

Per coil vs. per phase current

I'm working on a project using this stepper motor it is rated at 1.5 A/Phase current. Initially I planed of using this driver, so I checked if it can provide enough current for the motor. The website ...
0
votes
1answer
171 views

How does underdriving a powerful (eg. 50w, 100w) LED chip work?

My question concerns under driving an LED chip. Unlike quality brand chips (Bridgelux, Cree), in my experience, under-driving non-brand ones make things more long lasting and favorable. Using the ...
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0answers
77 views

Supply for autonomous car with sensors and DC motors

I'll be using the Guibot Motorduino for an autonomous car project. This includes L293D motor driver and 7805 voltage regulator. The other components: Multi-Chassis - Tank Version with two DC ...
0
votes
2answers
126 views

Why does my 24 volt DC servo motor run at 5 volt DC and not at 24 volt DC?

Why does my 24 volt DC servo motor move with 5 volt DC drawing 5 amps, but does not move with 24 volt DC? The power supply is 24 volt DC up to 10 amps. Datasheet are available for the DS4S servo ...
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0answers
63 views

Stacking DC-DC converters

I'm currently building a high-power LED driver to be powered from a 2.7V supercapacitor. To this end, I'm seeking a solution with high current rating (up to 3A, so ideally a controller IC rather than ...
0
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1answer
68 views

LED Backlight driver output current

Our LCD has 10 series white LEDs for backlight with total Vf of 15V and current of 40ma. The backlight circuit is designed with SC4509. As per the datasheet its recommended output voltage is 20V and ...
0
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1answer
110 views

Analog/PWM Dimming signal for a LED driver (LIPO battery low-voltage cut-off)

I am using a 4S LIPO-battery and a commercial constant current LED driver to drive a LED setup. Data Sheet for the driver To avoid abusing the LIPO battery, I would like to build a low-battery ...
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0answers
52 views

Design considerations for internal PC parts

I'm designing a PWM fan controller. It will be interally mounted inside a PC and will take power from the normal 4 pin Mate-N-Lock ("molex") connector. The on-board MCU and LCD will draw power from ...
3
votes
6answers
328 views

MOSFET PWM switch jamming on - why?

The circuit presented here is sized to switch 100W at a minimum pulse width matching 250Hz. But actually it's currently only being asked to switch around 10-20W. The load is an array of LEDs. Q1 ...
0
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1answer
76 views

Comparison of the efficiency of DC motor current limiting / control methods?

I'm using the wheels and motors of an RC toy car as a simple robotics platform. The car has 2 motors, one drives the back wheels, the other steers the front wheels. The steering motor is stalled by ...
1
vote
1answer
89 views

Driver for triac

Can you explain this schematic: Especially part where are optotriac and triac. I can't understand why if turn on optotriac \ then main triac will be open. Because I made a real scheme and ...
0
votes
1answer
46 views

What does shutdown mean for the IR2184

I'm trying to understand & design a circuit using two IR2184 half bridge drivers and some n channel mosfets to create a full H-bridge to control a motor. Reading the datasheet for the IR2184 it ...
2
votes
2answers
197 views

What LED driver IC options do I have to build a two-cell driver for a 3 W LED?

I need a very small and light 3 W flashlight/headlamp for a kind of specific purpose. I want to use two AAA Eneloop cells. In the datasheet there is discharge curve at 1.6 A, so I guess I ...
0
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0answers
52 views

Reference Current for many LED drivers

I am developing a project in which I need to control many LEDs simultaneously. Therefore, I am using many TLC5940PWP LED Drivers (which are driven themselves by small microcontrollers connected by an ...
0
votes
1answer
179 views

Beaglebone Black PWM Driver for 12VDC 1.05A Motor | Drive from Positive Side

I have several 12VDC 1.05A pumps I am using in my hombrew system which I would like to drive via PWM on my BBB. Each one will have a hall effect flowmeter attached so that I can get flowrates, totals, ...
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0answers
74 views

adjustable current driver for high power LED

I am trying to driver 3 high power RGB LED "Edixeon RGB" I want the current to be able to vary from 0 to 350 mA I am using three classical linear circuit, one for each color, with a current sensor ...
1
vote
1answer
252 views

Controlling 90 LEDs using one WS2811

I wanted to build a circuit where i would be able to control 90 LED's using one WS2811 and have a total of 60 WS2811. In this circuit I hope to connect 30 LED's per channel, there is no need for me ...
0
votes
1answer
39 views

Output Pin of Burleigh PZ-150 Amplifier Driver Analog High-Voltage Power Supply Unit

I have found a Burleigh PZ-150F Analog Amplifier Driver. However I could not locate the manual. What connector cables are compatible with the output port of this amplifier? It seems there are two male ...
0
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1answer
86 views

Choosing a high-power LED Driver IC [closed]

I need an LED driver to power one (or more) high-power LED(s) for a torch. Design requirements: Efficiency is paramount, since the power source is either a battery or a supercapacitor. Must be able ...
0
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1answer
70 views

How does this motor drive circuit work?

The Drive terminals are connected to a PWM signal generated by an arduino micro controller. The purpose of this circuit is to isolate the arduino from the motors to avoid too much current being drawn. ...
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0answers
99 views

Help identifying a voltage regulator

I'm trying to build a portable screen so that I can watch movies around my apartment if I need to move away from my TV screen (think a WiiU gamepad or a tablet). I have many raw components and I think ...
1
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3answers
83 views

Can I get constant current at the output of a buck convertor (to drive a LED)?

I want to drive a LED with a buck converter circuit as shown in the schematic below. In order to keep the circuit simple, the system will run open-loop (i.e.; there won't be any voltage or current ...