Multiple ADC using dspic30f3010

Started by angeline in comp.arch.embedded12 years ago 1 reply

I have written a code to do multiple ADC conversion using dspic30f3010. I am trying to test whether it works . but it seems like not doing what...

I have written a code to do multiple ADC conversion using dspic30f3010. I am trying to test whether it works . but it seems like not doing what I want . I wonder is it I have wrote it something wrong . I set this code to sample from AN2 and AN3 as my analogue input. And, I test it on two LED's . where if it's above this voltage then the LED will light up. Further to this , I need to use t...


DIP package LED dot matrix displays

Started by Andrew Smallshaw in comp.arch.embedded12 years ago 12 replies
LED

Maybe 10-15 years ago I remember seeing fairly small dot-matrix LED modules that were arranged to provide 4 characters per module in a DIP-like...

Maybe 10-15 years ago I remember seeing fairly small dot-matrix LED modules that were arranged to provide 4 characters per module in a DIP-like package. I'm thinking they'd be ideal for my latest project but can't find any reference to them now. Does anyone have any pointers? Alternatively does anyone have any ideas for alternatives? I'm looking for 16 alphanumeric digits (could possibl...


Some sort of anti-glare screen?

Started by in comp.arch.embedded11 years ago 6 replies
LED

My project board looks great in a dimly lit room, the LED's are nice and bright. In a well lit-up room though, it looks crap. I'll be...

My project board looks great in a dimly lit room, the LED's are nice and bright. In a well lit-up room though, it looks crap. I'll be putting my board in a transparent perspex case. I wonder is there any kind of layer or coating I can put on the perspex so that the LED's will look bright in daylight?


Questions on LED PWM

Started by Mike Silva in comp.arch.embedded11 years ago 9 replies

I need to drive some RGB LEDs to generate a bit of eye candy and I'm wondering if anybody has some experience on a few questions. First, I'm...

I need to drive some RGB LEDs to generate a bit of eye candy and I'm wondering if anybody has some experience on a few questions. First, I'm thinking of using 5 bits of intensity per color since the entire RGB value would fit nicely in 16 bits. Anybody have an opinion whether 32 intensity levels for an LED is "smooth enough" or "disconcertingly jumpy"? The LEDs are going to be pretty busy ...


Recommendations for a QVGA LCD Display

Started by arma...@hotmail.com in comp.arch.embedded15 years ago 2 replies

I'm looking for a Transflective, Landscape, QVGA (320X240), TFT with Touch screen and LED backlight. There are a number of displays that come...

I'm looking for a Transflective, Landscape, QVGA (320X240), TFT with Touch screen and LED backlight. There are a number of displays that come close (Sharp LQ036Q1DA01 (no touchscreen), Torisan/Sanyo TM038QV-67A02A (no LED backlight), Sanyo TM035QV-67P06A/Sharp LQ035Q7DB02 (portrait mode only)), however, I cannot find one that matches all my requirements. Can any one help ? The display...


LED video sender and receiver working principle

Started by piyushpandey in comp.arch.embedded4 years ago

Hi guys I was actually doing a project which involves high end processor and fpga for the display of the video on a LED Display panel which...

Hi guys I was actually doing a project which involves high end processor and fpga for the display of the video on a LED Display panel which might many of you have seen in public places or seminars or concerts where these large displays are used. My question is how should I proceed as it is actually cluster of many complex modules I think like Sender card Receiver card Hub card etc...


Simple "LED driver" chip?

Started by Richard H. in comp.arch.embedded13 years ago 33 replies

I'm looking for a driver chip to run several "high-current" (20-30mA) LEDs from a single MCU. I've got enough MCU pins for a 1:1 solution,...

I'm looking for a driver chip to run several "high-current" (20-30mA) LEDs from a single MCU. I've got enough MCU pins for a 1:1 solution, but the current exceeds the MCU ratings for direct connection. There's no shortage of advertisements for LED driver chips like Maxim's MAX6966, which could do the job (via SPI). I've got to think there's a simple multi-channel transistor package fo...


Jellybean barcode driver part?

Started by larwe in comp.arch.embedded14 years ago 7 replies

Is there such a thing as a jellybean 74- or 4000-series part that takes a binary or BCD input and drives a bar graph LED from it? I need to...

Is there such a thing as a jellybean 74- or 4000-series part that takes a binary or BCD input and drives a bar graph LED from it? I need to drive an 8-LED bar graph from a 4-bit data source with the minimum of components, and right now the simplest option appears to be a micro (well, or a PAL, but it's easier for me to develop a micro). The drive lines are output-only and can't be switche...


What is the best Microcontroller for interfacing the Matrix Display

Started by Anonymous in comp.arch.embedded2 years ago 8 replies

Hello All, My current project is to interface the display to the controller that gets the data through a Ethernet port and displays it on P10...

Hello All, My current project is to interface the display to the controller that gets the data through a Ethernet port and displays it on P10 LED display. I have a 16X32 P10 LED display. I have to make a 32X64 display with four such displays. The controller gets the data from either Zigbee or Ethernet (Using HTTP or TCP/IP protocol), extracts the information from the received packets and f...


Simple ARM timer interrupt question

Started by Paul Marcel in comp.arch.embedded15 years ago 17 replies

I'm trying to get a very simple timer interrupt working in C on Atmel's EB40A board. The processor is an Atmel AT91R40008. I'm using the gnu...

I'm trying to get a very simple timer interrupt working in C on Atmel's EB40A board. The processor is an Atmel AT91R40008. I'm using the gnu tools from codesourcery (arm-none-elf-gcc etc). I have some non-interrupt samples working. The interrupt is not working. LED1 (the main loop LED) blinks, but the timer LED doesn't blink. I found this sample on Atmel's web site but that loaded timer1_asm_...


Is PWM of OE pin on 74HC595 okay for LED brightness?

Started by dw in comp.arch.embedded15 years ago 2 replies

First off... I'm a PIC and electronics novice. I am breadboarding a cicuit to control LEDs using IO expansion. I am using the serial in -...

First off... I'm a PIC and electronics novice. I am breadboarding a cicuit to control LEDs using IO expansion. I am using the serial in - parallel out double-buffered 74HC595 shift register to control the LEDs. The shift register is controlled by a PIC 18F452. I created a PIC program to control the LED patterns. Now, I want to control the brightness of the LEDs. I tried using the...


Problem in LED Blinking program for gcc and olimex board LPC2378

Started by sach in comp.arch.embedded12 years ago

dear all, Please help me, I am using gcc compiler with eclipse. My board is of olimex LPC2378, I am writing a program to blink the LED. I am...

dear all, Please help me, I am using gcc compiler with eclipse. My board is of olimex LPC2378, I am writing a program to blink the LED. I am blinking the leds which are connected at P0.26 to P0.24. So for that I am configuring the registers as following... IODIR = 0x07000000; IOCLR = 0x0700 0000; to glow LEDs IOSET = 0x0700 0000; to making LEDs OFF But there is no any effect on LE...


Q: Driving a lot of leds

Started by Chris in comp.arch.embedded14 years ago 9 replies
LED

What do you guys do when you have to drive quite a few leds? ie 4 segented led displays and 20 standalone? 8 bit shift registers?

What do you guys do when you have to drive quite a few leds? ie 4 segented led displays and 20 standalone? 8 bit shift registers?


max number of led displays that could be multiplexed

Started by Joel in comp.arch.embedded10 years ago 6 replies
LED

I've got eight 7-segment displays. I know I've multiplex four at once but eight seems like a lot. It'd be slick to need just 16 pins. Can it...

I've got eight 7-segment displays. I know I've multiplex four at once but eight seems like a lot. It'd be slick to need just 16 pins. Can it be done? --------------------------------------- Posted through http://www.EmbeddedRelated.com


intefacing a LCD, Keypad

Started by Anonymous in comp.arch.embedded12 years ago 1 reply

Hi Can someone lead me to any tutorials or notes on the basics of interfacing a LCD, Keypad and LED with a 32-bit Micro ?? thanks newbie

Hi Can someone lead me to any tutorials or notes on the basics of interfacing a LCD, Keypad and LED with a 32-bit Micro ?? thanks newbie


Num lock indicator

Started by eeh in comp.arch.embedded15 years ago 1 reply

Hi, I need to interface to a PC Keyboard by MCU. I can get key from it. Howeever, I also need to turn on or off its num lock LED indicator....

Hi, I need to interface to a PC Keyboard by MCU. I can get key from it. Howeever, I also need to turn on or off its num lock LED indicator. I have tried but failed to do that. Could anyone kindly give an example code (C or asm) to me? Thanks!


multplexing 7 segment leds

Started by david in comp.arch.embedded15 years ago 3 replies
LED

hi group, i have a lumex ldq-m284ri quad seven segment led display and am wonder how to display separate digits on each segment since they are...

hi group, i have a lumex ldq-m284ri quad seven segment led display and am wonder how to display separate digits on each segment since they are connected together. my friend said i need to multiplex it, but he was not sure how to do it. does anyone have experience on this technique and what to share it. thank you in advance. dave


Driving LED with PWM, Beginner's Question

Started by syr123 in comp.arch.embedded11 years ago 2 replies

Hi all! True beginner here, but was very excited to find this site. I would greatly appreciate if someone could shed some light on whether or...

Hi all! True beginner here, but was very excited to find this site. I would greatly appreciate if someone could shed some light on whether or not I am going about a project correctly. Here are the facts: Using - PIC16F690 with an external 20Mhz crystal oscillator, powered by 5V (at 300mA? at least that's what the wall wart says - seems to be about 1 amp when I measure it). I am tryi...


AVR and dim LEDs.

Started by artswan in comp.arch.embedded13 years ago 14 replies

Hello all. I have been working with PIC microcontrollers for over 2 years now and I am familiar with and like them. However, recently I have...

Hello all. I have been working with PIC microcontrollers for over 2 years now and I am familiar with and like them. However, recently I have started dabbling with Atmel AVR microcontrollers to see what they have to offer. Especially, since they seem quite popular these days and are showing up in more open-source products. I have done some simple flashing LED circuits with the ATmega8 and 48, ...


PWM LED Array

Started by Gene in comp.arch.embedded8 years ago 22 replies

Hi all, Mostly a beginner here looking for some advice. I'm trying to create an array comprised of 63 vanilla (T1) single color LEDs connected...

Hi all, Mostly a beginner here looking for some advice. I'm trying to create an array comprised of 63 vanilla (T1) single color LEDs connected in one manner or another to a PIC32. Some of the considerations that I'm facing are that: 1. I'd like to avoid resistor arrays if possible. 2. It should be PWM dimmable. 3. It should consume as little power as possible, as it will likely share a 500...