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DS 18B20 Digital Temperature Sensor. Component Guide 9

DS-18B-20 DS 18B20 is a Programmable Digital Temperature sensor that gives Digital outputs based on the temperature. It provides 9-12 configurable Bit temperature readings which indicate the temperature of the device. Information is sent to / from to connect from a Central Microprocessor to the DS 18B20. Power for reading, writing and temperature conversion can be derived from the Data line itself so that no external power source is needed.
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Room Thermometer using Multi meter. Sensor Circuit 13

Temperature sensor IC LM34/35, are used in various applications to detect temperature variations. These devices can switch off / on circuits when the temperature varies from the normal set level. LM 34 and LM 35 Integrated Circuits are precision temperature sensors widely used in temperature sensing applications. LM 34 senses temperature in Fahrenheit range while LM 35 senses temperature in Celsius (Centigrade) range. The output voltage of these sensors is linearly proportional to the temperature. LM 34 and LM35 sensors are too sensitive and the static electricity while handling may damage the device. You can make a Room Thermometer using Multi meter. If you use a Digital display unit, you can make a permanent set up.

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Heat Sensor

This is the circuit of a Heat sensor that beeps when it detects heat. It is an ideal add on circuit in heat generating devices like Inverter and Amplifier. The circuit uses a NTC Thermister as Heat sensor.

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