Let's Make Robots!

led

Finds you the perfect Led for your project in a fun way
The Fun Led Checker Tester was something I needed for my workbench for a long time. Whenever you have an idea you start by going through your parts. Leds are in … Read more

Two Dumb Questions; TX/RX LEDs on TTL and Wheel on Motor

Good evening everyone,

Two dumb questions:

One,

I'm working on getting simple RX/TX traffic indicator lights on a 3.3v TTL system.

 

The LED is a tri-color RGB LED (datasheet).  I'm trying to accomplish something like in this post here, the Olin answer.

A few questions google has not answered

Hello everyone,

 

This is my first time building a simple robot. I am going to follow the "Start here" bot instructions, but I ordered a few extras to add in. I ordered a few leds and am trying to find a small speaker to use.

My questions:

1. What speaker can I use that will be compatitible with the start here project? (picaxe 28)

2. How do I wire said speaker to the picaxe properly? (I want to just play simple beeps and boops to start off with)

Blinks when getting dark
Last Friday my little one brought back an empty Yakult bottle from the Kindergarten. The teacher said the kids should build something with it. Since we once already … Read more
Scrolls a message in an 8x8 LED matrix
This may not look like 12 hours of work, but I reckon I spent appx 4 hours writing a little program to design the font, about 2 hours making the font, probably … Read more

Heatsinking a 50 Watt LED

EDIT: Converted to Celsius.

So, I'm working with this LED kit:

Robot water level sensor idea

All,

I spend 2 - 2.5 hours each day commuting to and from work, and I have plenty of time to think about things. 

One thing I have been thinking about is that I have never seen anyone use liquid as a way to keep a robot level.  I can't imagine that I am the only one to think of this; people must have looked into it and discarded it as a solution, or we would have three of these on our workbenches right now.  Or am I onto something really, truly original? 

Walk forword,back.left,right,balance one leg, up-down 1 or 2 leg,Turn right-left,Control With Bluetooth
Using a
My new Biped Robot "Red-Dragon V3"   what's new -Remove the camera Read more
In his research my brother needed to accurately control 96 LED’s on top of an Microwell plate. He had a similar setup earlier but wasn’t completely happy with … Read more
You can glow LED in 512000 colours using keyboard keys
I created this software using Processing software. If the selector is set in red, then the software sends values from 0 to 79, depending upon how much brightness is … Read more
Displays
After struggling for days with multiple designs, I have come up with something showable (I doubt this word exists). I have not included automatic movement here. I … Read more
Tells the direction of motion
The device uses 2 ldrs. It is programmed to check if any of them is low(I mean not receiving light). If so, then it checks if now the other one is low. Based on … Read more
Upon starting my Arduino adventures/misfortunes one of my first projects was hooking a resistor and an LED to the board and making it blink. But just like those … Read more
Thats an interesting an captivating slideshow of some pics captured during programming a RGB LED to glow in different shades through Arduino... Read more
RGB LED Glows in 7 different shades.
7 different shades of RGB LED.. Enjoy watching it.. And the URL that I have provided abive is for watching a slideshow of some pics captured during programming a … Read more
Light moves
The light seems to run as the LEDs glow one after the other. I've used a 555 timer IC and a CD4017 decade counter. Read more
Different colours at different rates
The RGB led glows in 7 colors and at 2 different rates. Hope you like it......Cheers...... Read more
UPDATE 28/12/2013 VIDEO of LEDko playing... macarena http://youtu.be/632UrOgEVBg VIDEO of LEDko playing the piano: http://youtu.be/OWzvuD2DSA0 LEDко is a robot … Read more
Counts down from 9 to 0 and beeps too
This is one of my 1st Arduino projects. Along with Arduino, I've used a seven segmeent led display and a piezzo buzzer. First, it beeps to indicate start. Then, … Read more
Navigate around, controlled by wireless tilt/accelerometer enabled controller
Using a
I've been building things like this for a while, and actually, LMR was one of the first places that introduced me to hobby robotics. I had already been building … Read more

Happy Birthday, LED!

Today (October 9) in 1963, Nick Holonyak, Jr. demonstrated the first visible-spectrum light-emitting diode to the bean-counters at General Electric.  He mixed Galium and Arsenide in a way that chemists told him was impossible to create that first familiar red glow.  Today, we're on the verge of replacing all innefficient filament-based lights with his invention (if the conspiracy theorists don't get their way, that is.)

[SOLVED] toggle ON/OFF remote LEDs

I can't believe I'm just about to ask this... but it has been a nasty weekend and despite all I've managed some progress. So yeah, now a feel a little silly at throwing the towel at some LED toggling.

So, I have a prototyped remote (TX) that send X, Y info from a joystick plus four buttons. The information is transmitted as an array in the shape of:

[XXX, YYY, A, B, C, D]

Draws light trails in long exposure photographs.
Using a
My heads been buzzing with project ideas lately and one such idea revolves around a light painting (aka light graffiti) robot. Too often I don't follow through with … Read more

LED trigger to picaxe signal

I found a new sound sampler module for my yellow drum machine. The problem I have right now is that the switch to operate and trigger the playback was a motion sensor. Essentially a LED in a thin tube.

I want to change that so that I can trigger that function from the Picaxe output.

Sound sampler board

Shines toward Spectator
Using a
The Starbot is a custom robot made for one of my sons. It is a star that shines and rotates to where the spectator is. My son found this wooden star-on-a-stick … Read more
So, this challenge is for anyone! From analog guys to digital guys. Only thing you should make is get leds turn on and off alternately, when you switch on and off … Read more
Decorative lamps, very simple circuit, two smd leds one 15 omh resistor and 5V supply. Attached with hot glue Read more