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

learn more… | top users | synonyms

0
votes
1answer
66 views

Two different outputs from same type of IC's

Hello Electrical engineering community. I am using motor drivers to get 5v to 12v and I am controlling each motor with each IC L293D. Each motor driver is controlling each motor and the outputs is ...
-2
votes
0answers
41 views

How can I implement the Driver on harware? [on hold]

I designed a VCSEL driver using cadence, simulation results show that the design works well. but when I tried to implement the design on a PCB it doesn't work anymore. I would like to know what is the ...
-1
votes
1answer
59 views

How big of CC driver do I need?

I am making a grow light. I have 72 3-watt LEDs on an aluminum sheet. 10 blue 62 red. They are wired in series. How big or how many watts LED driver do I need to power the light? I have 100 watt CC ...
0
votes
2answers
62 views

What's wrong with this IR2110 pulse transformer driver?

I'm trying to drive two MOSFETs through a pulse transformer. I'm using the "Power Supply Cookbook – Second Edition" book from Marty Brown. According to the book the formula to calculate the number of ...
0
votes
0answers
56 views

Modifying LED driver

A friend of mine gave me an LED driver that drives 30-36V and 3 amp in the output. Is there any way I can modify that to get 20-22V and 4-4.4 A to power a new LED I got? I live in Argentina, and ...
0
votes
1answer
17 views

Drive Stepper Motor using parallel Port

im having a little difficulty to drive this kind of motors using parallel port..have googled loads tutorials but unfortunately couldnt found any color codes or types of motors i have..i cannot even ...
2
votes
2answers
69 views

Push-Pull driver for low side mosfet — is it a good idea?

I want to build an H-bridge to control a 36V dc motor (or possibly 48V but lets stick to 36V for now) The electronics that will control the H-Bridge (logic, etc) will run from a 12V ...
2
votes
4answers
143 views

Pulse Detection

I have the following simple LED driver. I over drive LED much beyond its current limits in terms of current. (50mA @ 25% duty cycle with an RMS current around 12mA). In this case the circuit ...
1
vote
1answer
119 views

Do these LED's have a constant current driver built in?

I bought these LED's of eBay and connected them all (5) in parallel with a 4.7Ohm series resistor each. This should have given me a total current draw of 1.7A. However, when I measured it, I was only ...
2
votes
1answer
90 views

Combining LC filters

I would like to add an EMI filter to a high power LED driver. The datasheet of the driver suggests an LC filter for the power line as shown below. However I would like to use more than one driver ...
0
votes
2answers
63 views

Controlling LEDs [duplicate]

I am needing to control about 75 Infrared LED's individually of each other (can turn each on and off) through the use of the program LABVIEW. Originally I was thinking of using multiplexers to ...
-1
votes
1answer
50 views

Are LED drivers inter-switchable?

MR16 type LED bulbs need their halogen counterparts' driver replaced due to low power consumption and they require an "LED driver" that can deliver the necessary wattage. On the other hand, LED ...
0
votes
1answer
73 views

Can I control multiple stepper motor drivers from one controller?

I need to drive 6 stepper motors in open loop with 1/4 microstepping. The application requires all 6 motors to move by the same number of steps at the same time. There are no sensors of any kind on ...
2
votes
1answer
56 views

Electromagnet for string vibration

I recently read a lot about guitar sustainers, for those who don't know what are they - it is basically an electromagnet with an amplifier. It takes an input from pickup, amplifies it and then ...
0
votes
1answer
130 views

Running a low voltage stepper motor with a A4988 and 5V power suply

I got this little car I built using two of these motors and A4988 drivers. It was running with a 12V power supply, but I'm trying to get it on a battery and running for about 8 hours. thought I could ...
2
votes
2answers
111 views

Sourcing current with sink LED driver

I'm using an existing keypad with 8 LEDs that source power. I was hoping to use and LED driver of sorts, but all of the ones I find only refer to sinking power. Is it possible to use these drivers to ...
0
votes
2answers
78 views

How do you perform circuit calculations for the darlington pair

I need to know what formulas or set of calculations would be used to figure out the base resistor and load resistors when hooking up a darlington pair as my datasheet for the ds2003 does not provide a ...
1
vote
1answer
44 views

Beagleboard USB Packet sniffer

I had picked up a beagleboard a few weeks ago and had then looked into the USB sniffer project that had been created a while back. (https://gitorious.org/beagleboard-usbsniffer/) I understand that ...
0
votes
1answer
96 views

Beep patterns generator

I would like to generate the following beep patterns using a piezo buzzer: Single long beep Two short beeps Single short beep Is there any specific chip I can ...
0
votes
0answers
54 views

AC Linear Actuator Driver for Arduino

For experimental purposes I want to build a 1-axis Polar Tracker and use an Arduino as a PLC unit. As I know it's necessary to use an Opto-isolator to prevent high-voltage from affecting low-voltage ...
2
votes
3answers
87 views

Parasitic Capacitance and AC Coupling

I was reading on Capacitive Coupling a bit and become confused when reading the Parasistic section, specifically regarding two claims. If a high-gain amplifier's output capacitively couples to ...
0
votes
0answers
45 views

Calculating power draw for LEDs and driver (TLC5941)

I am designing a backlit keyboard with 61 white LEDs. These will be individually driven by a TI current limited PWM driver (TLC5941). LEDs: 61 x Osram LCW JNSH.PC (Datasheet) Drivers: 4 x Texas ...
0
votes
1answer
80 views

Simple high side driver for multiplexed 7-segment displays?

How can I best drive and switch high side power (for multiplexing) between the 7 displays with as few components as possible, for under $2. I am trying to simplify a design. I have a custom board ...
1
vote
1answer
148 views

LED driver circuit help needed

Please help me figure out which inductor to use from this datasheet. Sorry - it's in Chinese as this is an Asian sourced IC and not sold in the US. (Use google translate if necessary - but, the ...
-1
votes
2answers
82 views

Can a few inexpensive components light a white led from 2 AAA alkaline batteries? [closed]

Please help with finding an energy-efficient LED driver circuit for 2 AAAs(all the way down to 2V), for example for this LED: ...
0
votes
1answer
110 views

Why is a resistor put before the gate of a transistor?

In most of the H-bridge driver circuits I've come across so far, there's a resistor in the path of the signal to the gate/base of the mosfets/BJTs, like in the images below why is it put there ? ...
0
votes
3answers
117 views

Hot MOSFET DC-DC Boost Converter

What: I'm designing a DC-DC Boost converter for a solar panel maxmimum-power-point-tracker (MPPT). Setup: I'm using a TPS2819 MOSFET driver connected to a FQD16N25C N-MOSFET. The TPS2819 is driven ...
1
vote
0answers
68 views

Driving, feeding and similar terms in electronics

My technical background isn't very strong, and I often hear about one circuit "driving" another, or "feeding" it. Although, intuitively, I believe I understand the concept, I am not sure I would be ...
0
votes
2answers
95 views

Can I use a LED Driver to control a Solenoid?

I have on order an LED driver and I want to use it as a simple 12v DC output to control a Solenoid Valve. The Driver says Constant Current & Constant Voltage. I obviously don't want 1A pumped ...
8
votes
1answer
225 views

Severe ringing when high side MOSFET in half bridge circuit switches on

I have designed a PCB (intended as a prototyping building block) that has a IR2113 high and low side gate driver driving two IRF3205 (55V, 8mΩ, 110A) power MOSFETs in half-bridge configuration: ...
-1
votes
1answer
71 views

How is possible to connect 3x 100w led lights to a 300w led driver?

Could you explain if is possible to connect 3x lamps of 100w to 300w led driver? The led driver specification is: constant current, 27-36v, 9A. The lights: 1x, 27-30v, 3.5A, and 2x, 30-36, 3A. So, ...
1
vote
1answer
133 views

Porting Linux drivers specifically I2C

I am developing an I2C driver for an accelerometer. My objectives (actually it's the restriction I have as per the project guidelines given in my institute): use Linux flavour of operating systems ...
1
vote
2answers
176 views

Peak current limiting motor

I've got a motor driver which can take 3A. But my motor seems to draw more than 3A as peak current when it's been turned on. And I would like to get rid of that since it blew up my motor driver a few ...
0
votes
0answers
58 views

How to connect SINAMICS V60 driver to RaspberryPi

I have a Siemens motor with SINAMICS V60 driver (10A). Here is the Getting Started Manual (28MB PDF) . I want to connect this driver to the GPIOs of my raspberry Pi board. The purpose is to control ...
0
votes
0answers
55 views

3x CAT4101 parallel with CREE LEDs

I've tested the LEDs with one CAT4101 and they work great, but now it's time to dial it up a notch. I've now got three CAT4101's wired up in parallel to give me 3A to drive two 10W CREE LEDs in ...
1
vote
1answer
105 views

Can a Solenoid be driven from one of the pins of a Servo controller?

Would it be possible to operate a solenoid (e.g. this Plastic Water Solenoid Valve - 12V - 1/2" Nominal, suggested for use with "a TIP120 or N-Channel power FET with a 1N4001 kickback diode to drive ...
-5
votes
2answers
122 views

Is it a bus or driver? [closed]

A responsible designer has decided that we have a bus on the right and a buffer on the left. Do you think the same?
2
votes
1answer
112 views

Something better than an H-bridge to drive motor?

Is there something better than an H-bridge to drive two motors using the ATmega8 with a 7V power supply? My teacher said the H-bridge overheats and is bad. Is there a better solution? For instance: ...
0
votes
2answers
40 views

Driving TEC below rated voltage

Can a TEC driving IC such as the MAX1979 rated for TEC voltages up to 6V be used to control a 12V TEC - can TEC work under their rated voltage, with the amount of heat moved controlled by current, or ...
0
votes
1answer
51 views

DRV8835 OCP false trip?

I built a simple motor driver circuit using Texas Instrument's DRV8835 motor driver IC. The IC is driven in IN/IN mode, (the mode pin is left unconnected, pulled down by the internal resistor). VM is ...
2
votes
2answers
505 views

Why use stepper/DC motor driver?

Why use or implement a DC/stepper motor controller? Is it not possible to connect the motor directly to an MCU output pin without the driver?
1
vote
1answer
91 views

How to choose a correct LED PWM driver?

I would like to control an RGB LED via a (vendor specific) microcontroller. However its maximum output current is 60mA whereas my LED requires 100mA. I have seen number of LED driver solutions with ...
0
votes
1answer
205 views

What are the functions of the ULN2003A and HCF4094 within this circuit?

We are building a wordclock and want to know what the following components do within the circuit: ULN2003A driver IC HCF4094 shift register This is the schematic:
0
votes
1answer
65 views

DRV8837 PWM input?

I'm setting up a DRV8837 driver to work with an adjustable DC motor voltage (controlling the rotation speed). The datasheet claims The DRV8837 is controlled using a PWM input interface, also ...
1
vote
0answers
107 views

Removing DC bias current from PWM driven transformer

Previously I asked this question about circuit topologies for driving a transformer by a PWM signal. From the answers and comments under that question, I understood that the DC bias current is ...
2
votes
1answer
298 views

Problem interfacing Platform Cable USB DLC9G

I just started working with FPGAs/CPLDs. Coding and simulation went well and now I wish to program a device. So, I bought the DLC9G programmer plugged it into the USB port. I di not install any ...
0
votes
3answers
246 views

Understanding the relationship of Pulse and Stepper RPM

I have a pretty simple script that I'm using to control the RPM of my stepper motor: ...
2
votes
2answers
98 views

Can I use this high-side driver with arduino?

I have salvaged a PCB with quite few single and multi-channel high side drivers. One of the is VN5E010AH. If I understood datasheet, this chip can drive high voltage using low voltage cmos compatible ...
2
votes
3answers
71 views

When is an analog input amplifier needed?

I'm reading in values that are coming within the ADC's Vref range... 2.5V. Why do all of the datasheets recommend driver amplifiers and what is the purpose of this if the voltage is in range? Is this ...
1
vote
1answer
134 views

Current Controlled Output Using PWM

I am looking to control a proportional valve with a PWM signal that will correlate into exact current amounts (for example a 25% duty cycle will output 200mA, and a 90% duty cycle will produce let's ...