| An ATtiny2313 based Binary(or Geek) Clock using DS1307 clock chip IC and DS32KHZ clock oscillator chip |
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| I have decided not to publish the codes for my projects anymore in the public domain. Incase if you are interested and want to know more about this particular project, feel free to email me. |
| An AVR (AT90S2313) based Digital Temperature Thermometer/Thermostat (Based on Dallas thermometer chip DS1620) ( 1998 - Carried out at undergraduate school ) |
Download the assembly code The programmer hardware schematic and the software for programming the AVR can be found at http://www.lancos.com/siprogsch.html.
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| An 89C2051 Based Caller ID Unit
For this project I had used the popular ATMEL microcontroller 89C2051 for its low pin count. The DTMF decoding for the incoming calls was achieved by using the MITEL chip MT8870. An LCD module from LAMPEX was used for displaying the decoded telephone number. I had carried out this project back for my home in India. There is, however, a subscription fees for the caller ID activation, charged by the telephone company in INDIA. I will be putting out the schematic and the code for this particular project very soon.
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An Ultrasonic Rodents Deterrent |
This was a basically a repellant circuit which used ultrasonic waves to create stress in pests like rodents, wall lizards, squirrels, etc. Mostly all animals are sensitive to ultrasonic frequencies in the range of 40Khz - 60Khz. The circuit had a 555 timer configured as an astable (free-running) multivibrator whose output drives a piezoelectric tweeter. This circuit had enough power to keep the unwanted guests out of a small room. For larger areas, a suitable power amplifier should be used between the 555 output and the tweeter. I will publish the schematic soon on this site. |
