Comments on: Smart LED Prototypes

By: Sachin

Sachin — Sat, 03 Mar 2012 20:01:03 +0000

Sir, i would like to know more about implementing a software pwm. i have searched a lot for simple examples and was disappointed. Can you help me on this?.

By: Ron

Ron — Fri, 24 Feb 2012 23:49:46 +0000

Do you know how to make a tiny strobe circuit (maybe one strobe per second) for a 12v led?

By: Fiber-optic Christmas tree RGB LED upgrade | Nicholas C Lewis

Fiber-optic Christmas tree RGB LED upgrade | Nicholas C Lewis — Sat, 31 Dec 2011 07:31:38 +0000

[...] ATtiny13 and some transistors I had laying around. I found several example circuits and firmware, todbot and unixbigot. Both of these are very similar, however my final design is based on the second and [...]

By: Rotulos Electronicos

Rotulos Electronicos — Wed, 11 May 2011 09:54:05 +0000

Me encanta esta pagina, el contenido esta muy logrado, me gustaria saber si disponen de rss para estar pendiente de sus actualizaciones

By: nerissa

nerissa — Sat, 27 Nov 2010 13:23:14 +0000

hello, Im looking to attach 3 separate LEDs red, green and blue to a photo resistor and plan to mix the colours that way. using the motion of my hands. I have no idea of where to start, as im new to the whole Ardunio scene.

If you could help me out with how to go about constructing like this.
It would be a great help

Nerissa

By: Artem

Artem — Mon, 21 Jun 2010 17:38:49 +0000

I asked about Vf because i need (promised to my wife :) to make a small project with leds lighting from inside a small startfish skeleton (white semitransparent calcium thing) and it must be small. I am still puzzled how to power the whole thing and get it pretty bright. Currently i am thinking about CR2 battary with a small booster to 5-10V to power the leds and the attiny itself (i plan to use attiny44) is powered directly from the battery. The contrrol is via MOSFETs most likely. THis is just priliminary thoughs.

By: todbot

todbot — Sun, 20 Jun 2010 15:52:29 +0000

Artem, Yes, this is exactly correct. When run off 3V, these don’t work very well at all. Some LEDs work better than others, but in general it’s not that good.

By: Artem

Artem — Sun, 20 Jun 2010 15:17:06 +0000

Hmm. I see you power the whole thing from a 3V battery. But BLUE has a Vf if about 4V and you have put the R there too. How do you get away with this? IMHO you should get barely glowing blue if at all.

By: todbot

todbot — Mon, 19 Apr 2010 18:18:19 +0000

Hi Bazfum, Totally. I originally wanted something that looked like a regular LED (just two pins) but could be plugged into a "magic LED re-colorer" to set the color of the LED. In practice, the two pins were to be Gnd and 1-wire over power. Unfortunately, I couldn't get it to work as well as I wanted. And it wasn't easy to interface to Arduino. I2C was the 3rd or so choice down my list, and that's how BlinkM happened.

By: Three-component SmartLEDs « The tech telecom and all

Three-component SmartLEDs « The tech telecom and all — Fri, 16 Apr 2010 22:07:15 +0000

[...] Smart LED connects a single LED to a microcontroller and power source, allowing it to do fun stuff like [...]

By: bazfum

bazfum — Fri, 16 Apr 2010 21:56:07 +0000

What I’ve been wanting for a while now is an RGB LED with a Maxim 1-Wire controller built in. It would be nice to have a 3-pin LED that was fully programmable, possibly letting you load sequences in to run unattended, or simply hook up many LEDs to one I/O pin.

By: Bookmarks for March 30th through April 2nd « Stuff.za.net

Bookmarks for March 30th through April 2nd « Stuff.za.net — Fri, 02 Apr 2010 14:16:09 +0000

[...] Smart LED Prototypes « todbot blog Really like these, not sure what I would use it for but would love to build one. Just wish I could find a cheap source of these parts in South Africa [...]

By: The Pint Light! - Page 3

The Pint Light! - Page 3 — Fri, 29 Jan 2010 14:00:05 +0000

[...] pretty easy to do, and cheap: http://todbot.com/blog/2007/03/25/smart-led-prototypes/ If you don't own an AVR programmer it will be a bit more [...]

By: todbot

todbot — Sat, 23 Jan 2010 19:54:00 +0000

Hi techiebot,
Every 8-bit AVR chip is programmable with the AVRISP, with the exception of the weird ones, like maybe the 6-pin ones. You can definitely program an ATtiny13.

But also, I wouldn’t be so quick to offload sensor reading tasks to an ATtiny if you’re using Arduino. I would try using just the Arduino first and see how far you can get. If you find you’re running out of cycles, at least you’ll have some working sensor-reading code that you can pretty quickly port to an ATtiny.

By: techiebot

techiebot — Sat, 23 Jan 2010 15:20:35 +0000

Todbot: I have been building robots for a while now. I want my current one the have smart sensors (IR sensor, accelerometer, light detector, touch sensors) and the like but I don’t want to use up the Arduino’s processing time looking at them all the time. Do you think the aTtiny13 would work for sensor input?

Octopart.com shows that there are many flavors of the aTtiny13. Would any of them work with the AVRISP programmer?

Thanks