Since the phototransistor is only triggered by the IR radiation, an IR LED must be placed nearby. The intensity of the IR radiation determines how much current is generated in the photo transistor. Therefore a large current must flow through the LED to create a higher intensity. Figure 3 shows an IR LED circuit. if ((propeller_posn==0) This devise can be modifying as a computer based display board. A wireless system can be used to communicate between the PC and the device. This would let the user to display any massage easily on propeller display. Now, Mount the whole project to a chipboard with the help of a toy DC motor. Keep in mind that if you use a powerful motor for high speed, you may use a 9V to 12V battery instead.

(propeller_posn==35) If you come up with any interesting modifications then I will gladly post a copy or a link to your new sketch with credits. The LED panel was mounted to motherboard as a separate module. Figure 9 shows the PCB layout of the daughter card and the list of components are found in the Appendix C. (propeller_posn==15) Display pixel graphics transmitted from the PC. Instead of translating a RS232 character as an ASCII bitmap, the RS232 character could potentially represent pixel values in a column. A PC running software (C code, Python or your favorite script, LabVIEW, etc.) could translate images into RS232 messages that this display could show.Insert a Green LED into the holes with the long leg on the left side. Now from the copper side, bend its legs to one side (Green LED’s i.e. LED 12 – LED 16 via R12 to R16 and A5 to A1 respectively).

Here a major challenge that we faced is the connecting +5V supply to the rotating circuit. We tried the various methods to do that. But finally we choose a method, as shown in the above figure. V DC voltage provided to Mother board using 9 V regulator circuit. User can plug a 9Vdc-24Vdc range DC power supply as the power source of Motor. Minimum 500mA and Maximum 1000 mA current supply must provide to Motor to get a proper rotation speed. Before cutting any strands, make sure the LED's are all straight. if a few seem crooked, just apply heat to the solders you made to straighten them out. Careful not to burn your fingers! (propeller_posn==45) Now insert the resistors and bend its leads the same as you did for LED’s. Cut the extra leads accordingly.

ATmega32A has an 8-Bit Processor and it has 32K of program space, 32 I/O peripherals. It runs up to 16MHz with external crystal. There are two external interrupts in ATmega32A named INT0 and INT1.These INT0 and INT1 external interrupts can be triggered by a falling or rising edge or a low level. Here we use external interrupt 0 (INT0). Mechanical AssemblyThe same way, insert the remaining Red LED’s (LED 1 – LED 11 via R1 to R11 and D2 to D12 respectively). According to above calculations, it can be interpret the radius is proportional to the rotation speed of LED s. Interrupts tape, which no longer serve any purpose. You will now be able to hold the inner layer in place with a few spots of glue. An Infrared LED (IR), also known as Infrared transmitter, is a special purpose LED that transmits infrared rays with nanometer range of wavelength. IR transmitters along with IR receivers are commonly used as sensors. The appearance is same as a most common LEDs.