Embedded projects from around the web » AVR Projects

Alarm clock with glass ringer

admin — Sun, 29 Aug 2010 18:43:00 +0000

This is another analog clock solution as we’ve seen before. But this one has alarm functionality. Fun thing is how alarm is ringed. It uses a motor with two weights that hit the wine glass and this way makes a sound that will definitely wake you up.

Lock runs on legacy microcontroller AT90S2313 that can easily be replaced with ATtiny2313 with minor fuse changes. Clock also has a battery backup that will ensure that alarm will ring even if mains will be out.

Analog like Duino watch

admin — Sat, 28 Aug 2010 20:29:05 +0000

Digital clocks with analog imitating display sometimes look much cooler than simple digit indication. So there is another clock based on ATmega328P microcontroller running at 8MHz. To display time there are two circles of 2 LEDs used to indicate hours and minutes.

WPvideo 1.10

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Clock is powered by two 3V coin batteries so size is almost right to make it wearable. Clock relies on DS1337 real time clock so microcontroller mostly is put on a sleep mode and is waken when time needs to be updated or displayed when button is pushed.

ATtiny2313 prime number generator

admin — Mon, 23 Aug 2010 21:59:47 +0000

Probably you know that prime number is a natural number that can be only divided by 1 and itself. So these might be 2, 3, 5 and so on and on. But how to find large numbers that are prime numbers. OK Lets leave theory and move head to the project.

WPvideo 1.10

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Prime number generator is based on ATtiny2313 microcontroller and continuously discovers prime numbers up to 13 millions. So further numbers are discovered slower and slower, because microcontroller has to check every number by doing simple math. Interesting solution of displaying numbers is that they are represented as a grid table of powers of two. By adding these number light by LEDs lets you to find number in decimal format.

Binary clock with neon lamps

admin — Mon, 23 Aug 2010 19:59:37 +0000

This is very nice looking binary clock that is equipped with 6×4 cool blue-phosphor neon lamps. It is designed to display binary time, but also it can play animations or do other stuff when programmed.

Clock is powered by AVR ATmega328 microcontroller. MCU takes a 60Hz signal from mains and then converts it to timing reference. So no RTC here what leads to lower accuracy as mains AC voltage frequency fluctuates a bit due to grid load intensity. But overall design looks great especially with these neon bulbs.

Test a WiFi around you with portable WiFon

admin — Fri, 20 Aug 2010 05:21:32 +0000

Project is pretty interesting as it uses La Fonera WiFi Access Point running OpenWrt that takes care of reading signal information. The other part is left for ATmega88 which reads buttons, outputs information to 16×4 LCD screen.

WPvideo 1.10

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Microcontroller communicates with AP via UART, while in access point there is a Ruby script running and taking care of sending actual data upon request. What this device actually does? – It scans the area for WiFi, shows channel, SSID, and MAC information. And of course some additional goodies:

“- displaying networks found by airodump-ng
- deauthentication of a selected client
- connecting to an unsecured network and scanning i with nmap
- several attacks using mdk3
- displaying CPU and memory usage”