Circuit's Blog :
Return to BlogTV-B-Gone Device with Greater Distance
Posted Jan 31, 2012 at 1:59 pm
Figure 1
The project is focused on providing even greater distance that the TV-B-Gone device can reach in order to turn ON/OFF a television.
The modification of the design resulted to having 48 IR LEDs and an ATmega8 used to send the signals to the LEDs. The LEDs are arranged in 4 rows of 12 pieces in the LED board where the resistors are made to fit nicely between the LEDs. The rows were driven by 4 NPN transistors BD139. The assembly includes 48 LEDs, 48 transistors, and 192 holes along with the other parts.
The ATmega8 was chosen to be contained in the controller board since it has 8k memory that is required to store all the codes, an LED, a tact switch, an 8MHz crystal, and some resistors and capacitors. The code was adjusted from tiny85 to Atmega8 wherein getting the timers right was a little bit tricky. Some of the codes have been deleted to fit the 8k of ATmega8.
A Nokia Bl-5B battery is used to power the whole project. The battery could last for a long time but when it gets drained, it can be recharged from old Nokia phone.
Comments on this post:
Featured Products
Sullins Connectors
Wire-to-board interconnection options from Sullins feature a wide range of sizes and applications
MCC Voltage Suppressors
MCC’s TVS series high-power suppressors protect sensitive components from voltage spikes and transients
Bourns RS-485 Eval Boards
Evaluation boards that streamline evaluating circuit protection on RS-485 serial device ports
2 years ago: I liked the idea but doesn't it seem so bulky to become a remote controller for TVs?