Tagged Questions

1
vote
1answer
30 views

What’s a good substitute for the TD62783AFNG?

According to its datasheet, the TD62783AFNG is an 8-channel high-voltage high source-current driver. It is a Darlington arrangement that can source (not sink) up to half an amp thr …
1
vote
1answer
72 views

Problems driving leds with the MM5450

First what is my final goal: to drive 24 RGB LEDS using a microcontroller connected serially to a Micrel MM5450 LED driver. It would be nice to be able to drive all of them individ …
3
votes
2answers
175 views

What is the purpose of “MOSFET driver” IC’s

There are dedicated "MOSFET driver" IC's available (ICL7667, Max622/626, TD340, IXD*404). Some also control IGBTs. What is the practical purpose of these? Is it all about maximizin …
1
vote
2answers
153 views

High voltage/current open-drain output driver

I am looking for an IC that can be used to drive high voltage/high current digital outputs from a microprocessor. I currently use an MC33298 in one of my designs, but Frescale now …
3
votes
3answers
332 views

How does the Linistepper, open source linear Stepper Motor Drive work?

I have been trying to get the Linistepper to work, however I can't seem the understand the working of the circuit. The circuit is here. The issues that I'm unclear about are: …
6
votes
3answers
1k views

Best way to control 75 LEDs with Arduino

Hi, I need to control 25 groups of 3 LEDs or 25 RGB LEDs. Each group will be dismissed from the uC by up to 20 cm (about 8 inches). 20 cm is very safe assumption but I think it wil …
5
votes
1answer
318 views

Is it possible to drive a stepper motor greater than 1000 rpm?

How could I achieve this? What are the stepper motor facts and principless that I have to keep in mind to design a circuit to achive this goal? Are there any readymade/open so …
3
votes
2answers
182 views

How to test if it is a non-multiplexed (static) LCD?

Hi, I got some static LCD's from an old cheap clock, calculator and the like and now I would like to use them for displaying simple things like temperature. They are connected wit …
5
votes
2answers
377 views

BLDC and three phase inverter

Hi, I want to run/control a BLDC motor from a DVD/CD-rom player and found a schematic how to do this, the so called three phase inverter (see right schematic on this page: http:// …
1
vote
3answers
79 views

Current source for CREE XLamp XP-G

Looking to play around with the CREE Xlamp series LED and was wondering what would I need to drive them off 110V household power? Output current needs to be in the range of 800-90 …