LM35 and TL431 Automatic Temperature Control

This is an electronic circuit that can be used as automatic temperature control application. The circuit switches a miniature relay ON or OFF according to the temperature detected by the one-chip temperature sensor LM35. When the LM35 detects a temperature higher than the preset level (set by VR1), the relay is actuated. When the temperature falls below the preset temperature, relay is de-energized. The circuit can be powered by any AC or DC 12V supply or battery (100mA min.)

Download : schematic, layout and PCB (pdf)
related search : Electronic circuit project, automatic application, temperauter controller, LM 35 (src)