OLED THERMOMETER PIC12F629
OLED display, 128x64, 0.96", SSD1306, I2C with PIC12F629 and DS18B20 sensor. Oled is driven by software (bit banging) I2C.
Code includes functions for reading the sensor.
Temperature range is -55 to 100 centigrade.
470 ohm resistors are for attenuating 5V output of the pic to 3.3V input of the OLED.
 
OLED ROOM THERMOSTAT
OLED display, 128x64, 0.96", SSD1306, I2C. PIC16F628A Oled is driven by software (bit banging) I2C.
PIC12F1822 uses hardware I2C. Setting the room temperature by 2 buttons.
Output transistor is to drive a relay or directly 24VDC input to a central heating boiler. Hysteresis is 0.5 degree.
Reading the temperature is every second.
Circuit Description
See also Technical Tips
Pushbuttons are momentary N.O.
DS18B20 can be any type of casing.
OLED module is I2C interface, 4 pins connector. Driver SSD1306. From
ebay: https://www.ebay.co.uk/itm/0-96-I2C-IIC-Serial-128X64-White-OLED-LCD-LED-Display-Module-for-Arduino-UK/192294699203?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
OLED THERMOMETER USING DS18B20 DIGITAL SENSOR
Thermometer based on PIC16F876A
and DS18B20 digital sensor. Included C code and circuit diagram. Displays -55 to 125 centigrade. The temperature is read every 1 second. The math is using integers to calculate the degrees and the tenths of degrees are calculated separately.
Output at pin 3 can be used for driving a relay that is on when
temperature is higher than alarm setting. It can be used as a thermostat
or an alarm for over temperature. To set the alarm press SET for 2
seconds, then press DEGREE to set the alarm, then press SET again.
The OLED module is a 0.96" 128 X 64 pixel driven by I2C interface and
using SSD1306 driver IC. The OLED display uses low power LEDs and
suitable for battery operated. Power can be reduced farther by reducing
contrast.
You are free to use the circuit diagram and the software with no limitations.
 
Circuit Description
See also Technical Tips
OLED Thermometer
Pushbuttons are NO
DS18B20 can be any type.
OLED module can be bought from ebay: https://www.ebay.co.uk/itm/0-96-I2C-IIC-Serial-128X64-White-OLED-LCD-LED-Display-Module-for-Arduino-UK/192294699203?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649 |
Technical Tips
