This is the first project I made using 51 series MCU, together with my two friends Pengfei Gao & Kang zhao.
We had fun

The clerk in our shool’s canteen would always shout very loud to remind you that your food is ready. So it is always very noise in the canteen. Then we came out with the idea of this small device.

Every table in the canteen allows four students to have their lunch at one time. So this device has four LED in different colors and a buzzer and it can be controlled by a telecontroller. If we equip this device, which has its unique ID, on every table in the canteen, it would be convenient to aware a student that his food is ready by letting the LED flashes and the buzzer rings.

the chip:

the telecontroller module:


the shell: