BC 557 HEAT SENSOR

HI, THIS IS A SIMPLE HEAT SENSOR USING BC557

SOLDERING IRON

IMM SOLID COPPER WIRE

WODDEN BASE

I MADE THE BASE BY CUTTING A SMALL PIECE OF WOOD AND BURNT IT USING GAS LIGHTER AND DRILLED SMALL HOLES SO THAT I COULD FIX SOME SOLID COPPER WIRE TO SOLDER THE COMPONENTS

THIS IS A SMALL CIRCUIT DIAGRAM WHICH USES A PNP TRANSISTOR BC557 AND A DIODE 1N4148 AND A 5MM LED AND A CURRENT LIMITTING RESISTOR (150OHM)

AFTER SOLDERING