Circuit diagrams and schematics - Electronic projects

This is the fully featured, jammed packed temperature readout unit. I can measure temperature from up at 8 DS1820 digital temperature sensors all on the same 1-wire bus. That’s right only 3 wires are needed to go to all the temperature sensors, GND, VCC and 1-wire data. All sensors will connect to the same cable! [...]

This temperature monitor circuit is used where a continous analog display of temperature value being monitored is not necessary. A simple indication whether the temperature value exceeded a maximum level or went below the minimum level is sometimes enough. The circuit here does just that, it indicated the temperature level about +25oC (77oF) or below [...]

In this circuit, the LT1025 cold-junction compensator provides the signal conditioning. The compensator voltage varies with the temperature of the reference junction in such a way that when summed with the thermocouple voltage, the combination behaves as if the reference junction were maintained at 0 C. (You should place the compensator as close as possible [...]