Eletronic Hourglass led Diy Kits:
The suite adopts double layer PCB, and the circuit consists of 30 pieces white LED blue ray.
Under the control of MCU program, it displays analog hourglass iamge. It can be used as decoration of small night light.
Power Supply Voltage：3.3-5V
Electronic hourglass with electronic circuit control of the light-emitting diodes that sand, mimicking the movement of the hourglass. The electronic hourglass will be like a real hourglass, the upper part of the sand (light-emitting diodes) one by one down, the lower part of the sand a pile of pile up.