I am building an induction heater controlled by an Arduino UNO.
The intention is to use a DS18b20 temperature sensor to check that the circuit does not overheat.
The induction heater is controlled by a Fostek relay with a trigger tension of 3V Vcc minimum. The relay is on pin 6.
The DS18b20 Data pin is connected to pin 15.
When I poll the temperature sensor on pin 15 (or any other pin, I tried several) via
the tension on pin 6 raises so much that it triggers the relay.
The temperature sensor connected to +5V, GND and Data (Pin 15) with a 4K7 resistor between Data and +5V
It seems to me that when the sensor gets polled, the level of all the pins is raised above 3V.
Any help is much appreciated.