Projects

4 ALARM SOUNDS

4 ALARM SOUNDS using PIC12F629

This project is a miniature 1-chip alarm. All you need is a tilt switch, battery and piezo to produce a complete alarm. If you want a very high output, you can add a Darlington buffer transistor, piezo tweeter and a 10mH choke. The chip does all the work. It sits in sleep mode (100 microamps)

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Single Chip Temperature Data Logger

Single Chip Temperature Data Logger

Introduction A data logger is a device that records measurements over time. The measurements could be any physical variable like temperature, pressure, voltage, humidity, etc. This project describes how to build a mini logger that records surrounding temperature values. It has following features: – Uses just one 8?pin chip, so very compact size circuit. –

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