12v switch based on esp32;

Electrical characteristics

• Input 12v+
• Output 12v
• Has 5v expansion pad
• Has 3.3v expansion pad

Function

• Based on Esp32, intelligently controls DC 12v power supply. Based on Esp32 programming, use your mobile phone to control the opening and closing of the relay;
• The on-board LED indicator light displays different states according to the operating status. For example, when the computer is turned on but not connected to the Internet: flashing quickly; the network is successfully connected: steady on; the relay is on: flashing slowly;

Questions to be tested

• In the previous version: it works normally, but when the input voltage exceeds 12v (14v+), the 7805 module still generates serious heat. So in this version, it was replaced with a dc-dc chip (LM2596); I hope to solve the heating problem and increase the 5v load; of course, the input voltage cannot be too high. After all, if the pressure drop is too high, there will definitely be heat. The ideal input voltage is 12v;