Yet another meter clock

It seems that meter clocks gained some popularity among hobbyists. Probably because it’s a bit challenging and great looking projects. This one is based on AT89C5051 microcontroller. Circuit is pretty simple where timing is counted by DS1307 chip and analog meters are controlled by sending voltage levels through DAC converters and amp buffers. Clock is graded to 24 hour scale and can show hours, minutes and seconds on three meters. To see more packaging examples follow here. Continue reading

Even Your Desktop Deserves a Clock As Well!

You’re thinking that your desktop is too plain and you would like to do something with it? Ok, what about a stylish LED Desktop Clock? Yeah, it’s sounds cool, isn’t it? Basically, this project is uses RGB LEDs to create a clock face and each of the hand is assigned with a color and as the hands overlap on the face of the clock, it will then mix the colors! The clock will use a single AA battery to power the display, where it is boosted to 5 volts with a switching mode power supply. Then, the power supply would be fined to use any AA battery that is at 0.7 volts or even higher. This means that it should still work fine with AA batteries, which maybe “dead” when used in other devices! For this project, make sure that you’re using DS1307 for the heart of the clock and with a CR2032 coin cell battery backup as well! Remember that the battery should also be sufficient, so it can keep the time for at least a couple of years!… Continue reading