How to Build LED Hours

Once the Internet came across an article about the hours for which figures hovered in the air: And I came up with the idea to make them. I came ... and went because there were a lot of problems. Since I had never done schemes microns, it was the most important question - how to flash the controller? And still many other questions: how power is transmitted to the rotating board? How are working hours? 

The building hours is divided into several stages: 

1) The mechanical part. I decided to start with the mechanical part as well as it is easiest to do. I bought this cooler's size – 92*92*20 mm: The second coil (containing 30 - 40 turns of copper wire with a diameter of 0.5 mm): All the mechanics finished, proceed to the next step. 

2) Revolving board. That clock circuit: The rotating digital clock on the micron PIC16F84A. On sale there are two types of microns: PIC16F84A-04I / the P PIC16F84A-20I / the P for this scheme is necessary first option. did the board and soldered all the details: Then did board with LEDs (for better display of numbers is better to paint board and LEDs black, LED front whittle away, so as not to dazzle the eye), and solder it to the base, screwed the rotor and all connected: rotary board is finished. 

3) The supply part. Now we need to make the power supply to the motor, an infrared LED, rotary board. To transfer power to the rotating part of the scheme, you can use different methods: sliding contact, RF - generator, etc. The most common is a method using a brush. Its disadvantages are known - an intermittent contact, sparking a lot of noise.  Therefore, it was decided to transfer power through a rotating transformer with an air gap. 

BTW, you can select the clock circuit at Banggood. Besides, you can easily get other electrical accessories (e.g. door eye hole camera) there with high quality and reasonable prices.