This is a simple transmitter at 433MHz with the Receiver.
The receiver is pretty far away from the transmitter and as you can see there are many obstacles.
The transmitter is connected to the computer (serial port) and sends bytes to the receiver.
In this example the transmitter sends the bytes: one, two, three, etc.
The video is in low quality.
This slide show demonstrates all the steps of my final essay when I was student in national technical university of Athens (Greece).
Unfortunately most of the pictures are out of focus.
P.S. The music is coming from Windows XP intro, located at Windows\system32\oob ee\images with the name title.wma
IR remote control Robot with AT Keyboard.
It has a LCD and you can write messages with the keyboard from distance.
I made this robot for a Greek television show but it was never presented.
This is a simple homemade tape (cassette) player.
It amplifies (and filters) the signal directly from the head. The case is from an old car radio cassette player. The motor is spinning by giving 12V dc power.
In this example circuit i used different power supply for the motor and the circuit but you can use the same power supply.
P.S No additional circuit was used.
Read description in part 1
Note: In the video you will notice that sometimes the volume changes without touching the buttons. This is not a problem coming from the circuit but from the tape. This tape is pretty old and it has many problems. This is the reason I am pointing the tape
This is the same project like the one in the video http://www.youtube.c om/watch?v=ldJzHICl9 jg
This is the simplest generator because you have to build nothing
The only thing you need is a motor
When you are turning the motor's shaft then a voltage is generated. This voltage can easily light a common LED
This is a demo robot
It balances on the two wheels, using an ir sensor in order to calculate the angle (better the distance between the sensor and the ground)
Motors are continuous rotation servos
This is not the complete robot
This is a demo robot
It balances on the two wheels, using an ir sensor in order to calculate the angle (better the distance between the sensor and the ground)
Motors are continuous rotation servos
This is not the complete robot
This is a serial LCD for winAmp (without using third party software).
Besides the usual information on playing status and song's name, a visualization like the one at WinAmp's central window appears on screen
This is a simple wave player
It can play standard wave files at 2000 samples per second (low quality).
The hardware is very simple. Only one microcontroler, one I2C memory for storage, one 8bit DAC (ladder DAC) and an anti aliasing filter with an amp at the output is only what you need.
P.S. The wave file played is coming from a video interview file from Ubuntu
Here what happens when you place an electrolytic capacitor with the wrong polarity.
ATTENTION! Do NOT try this at home. You might burn yourself and the generated gas(or liquids) maybe toxic !!
This is the same circuit with the one in video:
http://www.youtub e.com/watch?v=vKGNjg 7ileY
The difference here is that we have a problematic DAC. This problem was fixed in the video:
http://www.youtub e.com/watch?v=vKGNjg 7ileY
P.S. The wave file played is coming from a video interview file from Ubuntu
This is the second demo of the simple hexapod robot with two continuous rotation servos.
This video demonstrates the construction of the three leg system (except the last step which is the actual placement on the robot. The last step is shown in video part 3).
