LM56 Thermostat Project Circuit Diagram values of R1, R2 and R3 for the required trip points VT1 and VT2 can be determined using the subsequent equations.

VT1 = 1.250V x (R1)/ (R1 + R2 + R3)

VT2 = 1.250V x (R1 + R2)/ (R1 + R2 + R3)

where:

(R1 + R2 + R3) = 27 k Ohms and

VT1 or T2 = [6.20 mV/degree Celsius x T] = 395 mV therefore:

R1 = VT1/ (1.25V) x 27 k Ohms

R2 = (VT2/ (1.25V) x 27 k Ohms)

VT1 = 1.250V x (R1)/ (R1 + R2 + R3)

VT2 = 1.250V x (R1 + R2)/ (R1 + R2 + R3)

where:

(R1 + R2 + R3) = 27 k Ohms and

VT1 or T2 = [6.20 mV/degree Celsius x T] = 395 mV therefore:

R1 = VT1/ (1.25V) x 27 k Ohms

R2 = (VT2/ (1.25V) x 27 k Ohms)

This cyberbanking ambit thermostat application IC LM56 diagram which simple activity you can use as advertence guide. As you know, IC LM56 is actual bifold achievement low ability thermostat characterize by National Semiconductors. 2 abiding temperature cruise credibility alleged VT1 and VT2 are fabricated with adding the IC LM56 1.250Volt centralized voltage advertence by three alfresco resistors (R1, R2 and R3) component. there's 2 agenda outputs for IC LM56 that is Output1 becomes LOW back the temperature increases aloft T1 and goes HIGH back the temperature decreases beneath (T1±Hysteresis Temperature). Basic IC LM56 has a array of advantageous appearance such as centralized temperature sensor, 2 centralized voltage comparators, centralized voltage advertence etc.