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

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55 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
45 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 ...
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1answer
98 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
92 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 ...
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2answers
67 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 ...
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1answer
35 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 ...
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1answer
93 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 ...
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0answers
45 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
79 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 ...
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0answers
34 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
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1answer
69 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
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1answer
142 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 ...
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2answers
67 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
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1answer
97 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 ? ...
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3answers
98 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 ...
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0answers
67 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 ...
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2answers
93 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
164 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: ...
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votes
1answer
65 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
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1answer
105 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 ...
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2answers
173 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 ...
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0answers
47 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 ...
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0answers
51 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 ...
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1answer
103 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 ...
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2answers
117 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
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1answer
111 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: ...
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2answers
37 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
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1answer
45 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
419 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
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1answer
85 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
174 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:
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1answer
60 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 ...
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0answers
92 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
233 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 ...
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3answers
183 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
89 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
68 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
107 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 ...
0
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0answers
91 views

Help with ICs, 2-digit 7-segment displays, 74HC4515

Can someone show me how to connect two DC56-11YWA 2-digit 7-segment LED displays to an Arduino Uno or Mega2560 using two 74HC4515s? Is there another IC that I will need in addition? I want to display ...
1
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1answer
158 views

High and Low Side Driver vs. Half-Bridge Driver

Please excuse me for what I am about to say as this type of area is all completely new to me. I am currently attempting to construct an H-bridge (which is a primer to my attempt in constructing a ...
1
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2answers
171 views

Can I use a dual high-side low-side gate driver as a dual low-side driver?

Some background: I am building a 350 VA DC to AC inverter, partly for my own curiosity, but mostly for a senior design project for my bachelor's. What I have with me is monolithic dual high-and-low ...
0
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2answers
115 views

Can the output of two 15-amp motor drivers be hooked up in series to achieve a 30-amp tolerance?

I had a cheap 15-amp motor driver that I bought on eBay. You can see product details here. I was planning to use this motor driver to power my robot, which uses two 24v wheelchair motors. Then I ...
0
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1answer
164 views

L298N damaged? What to do?

I'm trying to control a DC motor with the L298N motor driver and it worked for a brief moment. I've used the setup mentioned in this video tutorial, but someone in the comments said that with this ...
0
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2answers
61 views

Differential Driver Maximum Output Voltage Swing

I'm trying to understand how BTL driver on TI's DRV8662 Piezo Haptic Driver (datasheet) works. What I am confused about is how a 200Vpp output signal can be generated from a driver that only has rails ...
0
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1answer
66 views

Writting Joystick drivers for ARM Cortex [closed]

I need to write a driver for Xbox360 joystick controller, using its module and everything. The idea isn't just take the code, I'm really interesting in the theory behind it. Does anyone have any ...
0
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2answers
130 views

Motor/driver for smoothest and most constant speed

Which type of motor/controller can maintain the smoothest and most constant speed in the range 300 - 1000 rpm with minimal vibration? ie: low cogging torque, etc. I have an application in mind which ...
0
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0answers
49 views

Problem with microstepping mode and A4988POW

I'm trying to use the A4988POW stepper driver in 1/16 micro stepping mode to drive a stepper motor with low stepping frequency (~ 10 steps/s) for tacking an astronomical telescope. However in this ...
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2answers
709 views

Circuit to dim 40A/12V LED chain with PWM (Arduino output)

We have about 170 feet of LEDs (12VDC, 2.88W/foot) wired up in one chain. Currently they are driven by two switching power supplies (12V/27A). We'd like to control the whole chunk of them together, ...
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0answers
74 views

Multi Channel High Current LED driver

I am working on my capstone project in electrical engineering and I am looking for a RGB LED driver that can operate 350mA LEDs. I am using 9 RGB LEDs and I would like to get a multichannel LED ...
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2answers
68 views

Explain how this LED driver circuit will work - is there any way to turn on the LED?

Is there any way to turn on the LED in the below figure? You can apply different voltages at the diode input: