Content in “led”

All content tagged with or belonging to this tag/category.

picaxe trouble

electrictape22's picture

ok,

I just got a new picaxe 28x1 for christmas. I was trying it out and the pins don't seem to be working.

For example:

I connected a led to output pin 3 and ground and uploaded the code

main:

high 3

pause 5000

low 3

pause 5000

goto main

For some reason this code doesn't seem to do anything as the led just stays on constantly. and, yes I did wire the anode and cathode the right way

Is there something wrong with my chip, or am I just doing something incredibly obvious and dumb? 

 

Navigate around via Infrared Rangers
Using a
Rating:
4
Average: 4 (1 vote)
1-1-09 Roger has been working like this for a while, but I never went around to make a video of it. Here it is. I added some white LED's as head lamps and that is … Read more
Steps battery voltage up or down.
Rating:
0
The MC34063A is an easy to use DC-DC converter that can be used to step battery voltage up or down to run your processor, small servos or to make an efficient LED … Read more

I wish I had enough time to hack my graduation hat like this

Zanthess's picture

I was looking a while back for people that had hacked their graduation cap. I didn't find any links as to how to do it, but one professor actually designed a circuit board to replace the cardboard with some ultra-bright LEDs.

angered his fellow professors something fierce, but everyone else loved it.

link to the story 

Embedded video: 

SED or Smoke Emitting Diode

rik's picture

This is an attempt to record the very edge to which an LED can be driven. A failed attempt.

burned_leds_500.jpg

I tried to post this as a component page, but it would not take embedded video...

The LEDs I tried are rated at 30 mA maximum. The forward voltage is between 1.9 and 2.1 V. I used a power source of 8.1 V  and a variable resistor in series that could range from 5000 to 0 Ohm.

Embedded video: 

Cheap leds

Runaround's picture

need some bright leds?

Look here:

IKEA LEDS

10 bright leds for $3.90 (or 1,99 euros)

 

Can you work with LED???

Can you make a 3d LED cube with an Picaxe 28x1.  Like a 3x3x3 or bigger.  It something second I would love to do.  Robot is the first thing I want to do but learning more about LED and wanted to know if it is possible to do something like this.  I can't wait till I place my order in soon to get this and share my project with everyone.

Line follower
Using a
Rating:
4.333335
Average: 4.3 (3 votes)
Hello, I'm proud to show you my first robot. Its name is "War Pig" and it's a line follower. I'll give you some technical specifications about the … Read more

LED fun!

Nebster's picture

i think this little project would be good for your programming and electronics.

it looks like a lot of fun.

Embedded video: