DENEST Retro Steampunk Wall Clock Decor Wall Air Plane Propeller Clock Ornament Design Industrial Wall Aviation Ornament for Cafe Bar (Have clock)

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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!

Conventional methods of displaying images or massage to public are using LCD display and dot-matrix LED displays. Propeller LED display is a special kind of device that project an image, text or time as if the images are floating in the air. Actually the floating images emerge by synchronizing LED’S blink to form an image at particular time and rate. Here is a speciality of this project. usually, we make a POV display using a big, high-speed Dc motor because our POV circuit runs on 9v or another little bit weighty battery. This devise displays only the time. Therefore we can modify this devise for display date besides time. The motor/secondary assembly can now be inserted into the base unit. It will be glued using a few drops of After that, the soldering begins! Be very careful when soldering the digital pins; it is very easy to accidentally connect to digital pin connections. Soldering here can be challenging, so I recommend using electric tape to keep wires still when soldering.http://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/f2012/cfz4_sjh234/cfz4_sjh234/FinalProjectDocumentation.html The first prototype was built using magnet wire for the spinning air-core transformer. 28 gauge wire was used in the handmade prototype. 28 gauge wire has a cross-sectional area roughly equal to a 1oz 100 mil wide PCB trace. The actual PCB used 10 mil wide trace for lower current by taking advantage of the ~4 ohm equivalent series resistance (ESR) of the PCB trace at the cost of lower power transfer to the secondary board.

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.Now insert the resistors and bend its leads the same as you did for LED’s. Cut the extra leads accordingly. (propeller_posn==30)

The transformer primary will then be glued to the board on the other side, around the motor. Before Insert the Blue Led above the green led as shown in fig (Blue LED 17 via R17 and A7). Connect R17 as 2.2kΩ and join the cathode of this LED to the cathode of other LED’s. Now, connect the positive leg of this Led to one end of the resistor R17 and the other end to the Arduino +5V pin. On the front, This pin will connect to the last LED. For easy reference, when flipped over each digital pin connects to its closest positive LED strand/pin. This is how the LED's will be soldered to their respective Digital Pin. It's a bit confusing to explain but very easy to follow if you look at the picture. Flip the pixelmap for the time to be readable at the top or bottom (there is a #define constant already in code to select).

Version 3 (Summer 2006)

(propeller_posn==45)

The most important part of the system is microcontroller. It controls whole system. In here I have used an ATmega32A microcontroller. I decided to dust off this old classic project and bring some improvements from what I have learned from the older versions. The biggest problems with the first 3 versions I built many years ago is that none of them really lasted more than a year or two because the slip rings or brushes wear out and cease to conduct current for the spinning board. Even the brushes inside the DC motors wear out and they simply quit running. Also I used to have trouble programming PIC microcontrollers and not to mention that many of the code I'm used to for PICs were written in raw assembly code. No more!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. The FSK modulator circuit shown above will function fine with RS232 either in the standard signaling format (-3 to -15V low, +3V to +15V high) or TTL levels (0V low, +3.3V to +5V high). The diode at the base of the transistor clamps the base of the transistor to ground to prevent negative signal voltages from causing damage to the transistor. I used the Schmitt buffer oscillator instead of a 555 timer because I anticipated a possible need to switch the transformer coil at > 500KHz, which is beyond the capabilities of the 555 timer. Also cheaper 555 timers actually tend to be 100KHz versions. 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 is a calculation for calculate the rotation speed of the LEDs when a picture is displayed with a frame rate of 25Hz.