In this video, we explore a DIY proof-of-concept project called “Musical Temperature Alarm”, published on Electronics For You.When the temperature rises (for example, by bringing a hot soldering iron close), the circuit detects it. Once the set limit is crossed, the music starts playing.In this video, we explore a DIY proof-of-concept project called “Musical Temperature Alarm”, published on Electronics For You.
Monitoring temperature is important to protect electronic equipment and maintain safe room conditions. Most temperature alarms use buzzers or LEDs, which can be irritating or easy to miss.
Monitoring temperature is important to protect electronic equipment and maintain safe room conditions. Most temperature alarms use buzzers or LEDs, which can be irritating or easy to miss. This project takes a different approach. Instead of a beep, this temperature alarm plays a melody when the temperature crosses a preset limit.
When the temperature rises (for example, by bringing a hot soldering iron close), the circuit detects it. Once the set limit is crossed, the music starts playing.
What You Will Learn
- How to use an op-amp as a comparator
- How to set a temperature threshold using a preset resistor
- How to design a low-power, battery-operated circuit
The components required to develop this project are:
- LM335 temperature sensor converts temperature into voltage
- TL071M op-amp works as a comparator to detect when the threshold is crossed
- UM66 melody IC generates a musical tone as the alarm
- Resistors
- Potentiometer
- Transistors
- Diodes
- Capacitors
- Loudspeaker
- Breadboard
