Staff with Click Sound and Obstacle Alarm

People who are visually impaired usually use a staff to guide them as they walk. They tap with their staff to know if an obstacle is present around. Others use the echolocation technique. They produce a clicking sound through their tongue, foot, and fingers and through this they detect objects from their surrounding by sensing the echoes produced. The design above is a simple project that aims to assist vis ...

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DIAL ALARM-1

This is the lowest cost dialing alarm on the market and shows what can be done with an 8-pin microcontroller. The complete circuit is shown below. You cannot see all the features of this project by looking at the circuit - most of them are contained in the program. So, read on and see what we have included. . . Dial Alarm-1 has a single input (although a number of sensors can be placed in parallel on the sa ...

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Dialing Alarm using PIC16F628 Microcontroller

This is the lowest-cost dialing alarm on the market and shows what can be done with a PIC microcontroller. The complete circuit is shown below. You cannot see all the features of this project by looking at the circuit - most of them are contained in the program. So, read on and see what we have included. . . The programming socket is not on the PC board - it has been added for the time when you want to modi ...

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PIC12F675 Microcontroller Based Security Alarm Circuit

Crime in general is still on the rise, and having a security alarm installed is no longer a perquisite of the wealthy! Here is a simple and compact security alarm system to protect your home/shop and valuables. The circuit is built around a tiny microcontroller chip PIC12F675. Besides, a ready-made Passive Infrared (PIR) module is integrated with the alarm system for reliable human-motion detection. The bui ...

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Anti-Drowsiness Alarm

This reference design is an anti-drowsiness alarm, which aims to keep the drivers alert by disrupting one’s drowse. According to the study by U. S. National Highway Traffic Safety Administration (NHTSA), drowsy driving is the primary contributor of at least 100,000 auto crashes a year. Statistics shows that most crashes caused by drowsy driving occur from midnight to 8:00 am. During these times, a person of ...

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PIC24 Bedside Table Alarm Clock

Another year, another clock, but for the first time for my alarm clocks [1][2][3] I am not using an MSP430 but a PIC24 instead. Standby current is with 5.5 µA only slightly higher than that of my MSP430 based ones. Time keeping is done using the RTCC pheripheral, which I also used for the first time. It can be seen in action in this YouTube video: https://youtu.be/I8K4sLvQby4 Friendly green digits :) And of ...

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Website Down Alarm

If your website goes down, you want to be the first to know. Make it obvious when there's a problem by hooking up a big alarm light to a Tessel, which will ping your website every few seconds to check for trouble. Light patterns Continuously off: all is well Continuously on: website being monitored is down Two-second bursts (on or off): system error; monitoring isn't working (reset the Tessel) Materials Tes ...

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Alarm Phone Dialer with MT8880 and PIC 16F84A

Just hook this Alarm Phone Dialer up to something you would like to monitor, for example, a high water alarm, low temperature alarm, back window, garage door, etc. When the system is activated it will call a number of programmed numbers to let you know the alarm has been activated. This would be great to get alerts of alarm conditions from your home when you are at work. The microcontroller code is provided ...

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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) and waits for the enable line to go high via the tilt switch. It then produces a SPACE GUN alarm for approx 3 minute ...

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Tiny GSM alarm system using PIC16F84A

After GSM call alarm and GSM SMS alarm as two independent modules, I introduce the Tiny GSM alarm system. The main characteristic of this new version is that this device can operate standalone or as a module for existing alarm system. In previous versions we had only the "enable" pin that armed/disarmed the system. Now, aside from that pin we can arm/disarm the system by calling it with our phone. UPDATE 2: ...

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