AVT769 A

The presented project allows to realize some interesting and useful devices. In the maximum version, it is a lamp for a camping fridge with an acoustic thawing signal. Opening the refrigerator door causes the light to come on. Too long opening threatening to thaw and frightening catastrophe catastrophe will cause an intermittent warning signal.
The PCB is designed in such a way that it would be possible to implement several other projects - various types of signaling devices or devices useful in everyday life.

The device is especially recommended to electronics people who want to explore the secrets of signaling and all concerned about the proper operation of camping refrigerators

Selected parameters:

• in the full version with a fridge lamp
• thawing signaling - acoustic and light
• three LEDs
• the ability to easily perform other signaling functions
• triggering with a button or phototransistor
• power supply - 4,5Vdc (three 1.5V batteries)
• tile dimensions 57x48mm
• printed circuit board and documentation included
  A version with a set of independent components is available

Detailed description in